Re: -[NSColor setBackgroundColor:] not working in 10.6
- (void)drawRect:(NSRect)rect {
[...]
[img drawInRect:rect ...];
}
Not related to your original problem, but please note that the NSRect passed to
drawRect is the dirty area that needs to be redrawn. In many cases this matches
self.bounds, but not always. So using this rect as position to draw your image
is a bug in this case and might result in unexpected drawing errors.
Regards,
Mani
--
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LittleSecrets - the encrypted notepad
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Watchdog - baffle the curious
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Re: init returns nil or raises exception?
Op 7-10-2010 18:12, Jean-Daniel Dupas schreef: Le 7 oct. 2010 à 18:04, Kyle Sluder a écrit : On Thu, Oct 7, 2010 at 12:47 AM, Remco Poelstrare...@beryllium.net wrote: While still in the process of cleaning up my code, I read in the documentation of NSObject that -init should return nil if it fails to initialize. But a paragraph lower it's stated that -init should always return a functional instance or raise an exception. Isn't that in conflict with the allowance of returning nil? File a documentation bug. I would imagine the paragraph about the exception is saying that an exception must be raised rather than returning a half-constructed instance of the object. I agree. The must raise an exception is a bug in the documentation IMHO. There is a lot of recent API that used the 'return nil' pattern (especially methods design to return an NSError by ref). Ah, I see. I hoped it was 'the new way to go'. I like to more than checking for nil, but I might be a bit lazy :) I'll file a bug to get the docs updated. Regards, Remco Poelstra ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: init returns nil or raises exception?
On Fri, Oct 8, 2010 at 12:04 AM, Remco Poelstra re...@beryllium.net wrote:
Ah, I see. I hoped it was 'the new way to go'. I like to more than checking
for nil, but I might be a bit lazy :)
Checking for nil and assigning to self should be reflexes. You can
combine the two if you like. Whenever I write an -init method, I
always follow the same pattern. I don't even need to think about it:
- (id)init {
if (!(self = [super init]))
return nil;
// do other initialization
return self;
}
To my brain, it might as well be required syntax.
--Kyle Sluder
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Re: init returns nil or raises exception?
Op 8 okt 2010, om 09:57 heeft Kyle Sluder het volgende geschreven:
On Fri, Oct 8, 2010 at 12:04 AM, Remco Poelstra re...@beryllium.net wrote:
Ah, I see. I hoped it was 'the new way to go'. I like to more than checking
for nil, but I might be a bit lazy :)
Checking for nil and assigning to self should be reflexes. You can
combine the two if you like. Whenever I write an -init method, I
always follow the same pattern. I don't even need to think about it:
- (id)init {
if (!(self = [super init]))
return nil;
// do other initialization
return self;
}
To my brain, it might as well be required syntax.
Yes, but in the rest of my code I've to do the check as well, so this is
actually not a good thing to do:
[someObject doSomethingWithObject:[CustomClass
customClassObjectThatMightBeNil]];
Assuming there is also a convenience class method that calls that same init as
above.
Regards,
Remco Poelstra___
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Re: Calling maincontroller
On 7 okt 2010, at 22:13, Quincey Morris wrote:
On Oct 7, 2010, at 11:58, Hans van der Meer wrote:
In my application I instantiate a MainController (the delegate having
awakeFromNib) from where all actions are dispatched. In order to send
messages to the displaywindow residing in MainController, there is the
problem how to find this MainController from other callers (possibly on
other threads). Now it is coded as follows:
In MainController.c:
static MainController *controller = nil;
controller = self; /* in its init method */
+ (void) message:(NSString *)msg;
{ dispatch_async(dispatch_get_main_queue(), ^{[controller message:msg];});}
- (void) message:(NSString *)msg;
I am not very happy with the static variable but do not see another way to
accomplish this. I fear my solution is not as much in the spirit of Cocoa
programming as it should be.
Is there a better way?
If it's your application delegate, other objects can find it as [NSApp
delegate] or [[NSApplication sharedAppplication] delegate].
That is exactly what I needed. My code now is:
- (void) message:(NSString *)message;
{
dispatch_async(dispatch_get_main_queue(),
^{[[NSApp delegate] message:message];});
}
And this will get rid of the static variable and the class function in the
MainController. It is of course a matter of which style one prefers. For me
this coding most clearly expresses what goes on and shows it at exactly the
point where the action is invoked.
Thanks!
Hans van der Meer
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Problem using dictionary
Hi, I've the following code: NSDictionary *dict=[[NSDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@Indexes ofType:@plist]]; //This is actually a global initialized in +initialize. NSString *key=[NSString stringWithFormat:@%...@.%@,page,property]; NSLog(@%@,key); NSLog(@%@,[[dict valueForKey:key] description]); NSLog(@%@,[[[dict valueForKey:page] valueForKey:property] description]); The result from the code is: page1.fwRevCode (null) 6 The first and last are exactly what I expect. But why can't the dictionary find the value with the full key? Thanks in advance. Regards, Remco Poelstra___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Problem using dictionary
Ah, I should use valueForKeyPath:. Is there a reason valueForKey: is documented directly but valueForKeyPath: is not? Kind regards, Remco Poelstra Op 8 okt 2010, om 13:34 heeft Remco Poelstra het volgende geschreven: Hi, I've the following code: NSDictionary *dict=[[NSDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@Indexes ofType:@plist]]; //This is actually a global initialized in +initialize. NSString *key=[NSString stringWithFormat:@%...@.%@,page,property]; NSLog(@%@,key); NSLog(@%@,[[dict valueForKey:key] description]); NSLog(@%@,[[[dict valueForKey:page] valueForKey:property] description]); The result from the code is: page1.fwRevCode (null) 6 The first and last are exactly what I expect. But why can't the dictionary find the value with the full key? Thanks in advance. Regards, Remco Poelstra___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/remco%40beryllium.net This email sent to re...@beryllium.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Where is SimpleTextInput sample code project?
Text and Web Programming Guide for iOS (http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/CustomTextProcessing/CustomTextProcessing.html) says: The code was taken from the SimpleTextInput sample code project. Does that sample code project exist? Where? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Question about MPMusicPlayerController
I have an app I am playing around with to play my music on my Touch. When I
select a genre that is in a table, I construct a query to get all the tracks
for that genre, start that queue, build UI in a scrollview.
However if I choose a Genre like Rock that is available and has a lot of
tracks in it, my app crashes. Works for less-populated genres. Am I doing
something really stupid here?
In my -tableView:didSelectRowAtIndexPath
MPMediaQuery *query = [[MPMediaQuery alloc] init];
[query addFilterPredicate:[MPMediaPropertyPredicate
predicateWithValue:[liveGenresArray
objectAtIndex:indexPath.row]
forProperty:MPMediaItemPropertyGenre]];
NSArray *songs = [query items];
if([songs count]0){
selectedNowPlayingRow = 0;
[myPlayer setQueueWithQuery:query];
[nowPlayingSongs removeAllObjects];
for(MPMediaItem *song in songs){
NSString *songTitle = [song
valueForProperty:MPMediaItemPropertyTitle];
[nowPlayingSongs addObject:songTitle];
}
songTitleLabel.text = [nowPlayingSongs objectAtIndex:0];
[self updateNowPlayingScroller:query];
[myPlayer play];
[query release]
///...
Google Voice: (508) 656-0622
Twitter: eric_dolecki XBoxLive: edolecki PSN: eric_dolecki
http://blog.ericd.net
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Release autoreleased object now
Is there a way of forcing an autoreleased object to be released right now? I am encountering problems in my image processing code where I am receiving (and later discarding) a lot of large blocks of autoreleased memory in a loop. This is not getting cleaned up until the end of the loop (when I drop back into the run loop) and I am running out of memory. The problem is coming from OS functions such as [image TIFFRepresentation] that return autoreleased objects, so it is obviously considered ok to autorelease large chunks of memory. My question is whether I can tell the OS to release the memory *now* rather than waiting until the pool is drained. At the moment I am bracketing the relevant parts with my own autorelease pools, but that is getting a bit tedious. I would like just to be able to call [imageRep releaseNow] or something. I suspect that just calling 'release' on the autoreleased memory would be a Bad Idea. Any suggestions very welcome! Cheers Jonny___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Release autoreleased object now
On Oct 8, 2010, at 9:58 AM, Jonny Taylor j.m.tay...@durham.ac.uk wrote: The problem is coming from OS functions such as [image TIFFRepresentation] that return autoreleased objects, so it is obviously considered ok to autorelease large chunks of memory. My question is whether I can tell the OS to release the memory *now* rather than waiting until the pool is drained. At the moment I am bracketing the relevant parts with my own autorelease pools, but that is getting a bit tedious. I would like just to be able to call [imageRep releaseNow] or something. I suspect that just calling 'release' on the autoreleased memory would be a Bad Idea. No, you cannot force an autorelease pool to release its contents without calling -drain. Wrapping the autorelease-intensive portions of your code is the correct approach. --Kyle Sluder___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: [iPhone] Changing iPhone Application Language Programatically.
Tharindu, We had to do something similar and decided to eschew .lproj files entirely; we simply created an ivar in our app delegate to store the current language and switched out strings (stored in strings files) based on the current language. There’s no reason you couldn't do the same in your app. -Jeff Kelley On Monday, October 4, 2010, Tharindu Madushanka tharindu...@gmail.com wrote: Hi, I would like to know whether its possible to change to a language other than provided list of languages in iPhone Settings. By default using localized .lproj folders .strings files we could make applicaton localized into selected language. For example, Languages like Sinhala are not in those set of languages in Settings. And there also does not have Sinhala Keyboard on iPhone. But Sinhala unicode font is available from iOS 4 onwards which is nice even it has some rendering issues. If I want to build a localized app for that language, is it legal and whether its possible that I will create si.lproj directory and programatically forcing the app to use strings in that folder ?? Thanks and Kind Regards, Tharindu. tharindufit.wordpress.com -- Jeffrey R. Kelley slauncha...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
confused about floats
I've got two float values (x and y) that I'm using to change the
coordinates of a drawing action that is being looped through. I can
add a value to x and it draws the next image along, but I want to test
the value of x and if it is out of bounds I want to reset it to zero
and increase y, so I get a grid of images drawn.
For some reason, even though I can do
x = x+128;
and it moves the image accross, x seems to be null so I can't test
against it, my if statement ' if (x 300){' always fails.
This must be something really simple I just can't see it this morning?
I'd appreciate any help.
Many Thanks
Amy
Full code being used:
- (IBAction)generateKitImages:(id)sender;
{
NSObject *kit;
kit = [[kits selectedObjects] objectAtIndex:0];
NSString* fileName = [[kit valueForKey:@kitName]
stringByAppendingString:@.jpg];
NSString* kitimagePath = self applicationSupportFolder]
stringByAppendingPathComponent:@images]
stringByAppendingPathComponent:@kit]
stringByAppendingPathComponent:fileName];
//NSLog(@Kit Image Path: %@, kitimagePath);
//create new image 300px square
NSImage *targetImage;
NSSize targetSize = NSMakeSize (300, 300);
targetImage = [[NSImage alloc] initWithSize:targetSize];
//select all images for kit
NSArray* kitImages = [kit
valueForKeyPath:@kitItems.kitItemProduct.productImage];
//set coordinates to x,y - 0,0 to start
float x = 0;
float y = 0;
//for each image
NSEnumerator *imageLoop = [kitImages objectEnumerator];
NSString *imgPath;
while ((imgPath = [imageLoop nextObject])) {
NSImage *img = [[NSImage alloc]initWithContentsOfFile:imgPath];
//NSLog(@Image: %@,img);
//resize to 100px high
//get original size
//NSSize *origSize;
//origSize = [img size];
//calculate scale factor
//[img setScalesWhenResized: YES];
//[img setSize: NSMakeSize (100., 100.)];
//apply image to view
[targetImage lockFocus];
[img drawInRect:NSMakeRect(x,y,100,100)
fromRect:NSMakeRect(x,y,100,100)
operation:NSCompositeCopy
fraction:1];
[targetImage unlockFocus];
//set new coordinates
x = x+100;
//if coordinates are too wide, start new row - if x300, reset x to
0 and add 100 to y
if(x 300){
x = 0;
y = y+100;
}
}
//apply kit logo to view
//apply kit date (text) to view
//save files out
//create a NSBitmapImageRep
NSBitmapImageRep *bmpImageRep = [[NSBitmapImageRep alloc]initWithData:
[targetImage TIFFRepresentation]];
//add the NSBitmapImage to the representation list of the target
[targetImage addRepresentation:bmpImageRep];
//get the data from the representation
NSData *data = [bmpImageRep representationUsingType: NSJPEGFileType
properties: nil];
//write the data to a file
[data writeToFile: kitimagePath
atomically: NO];
//link images to kit
[kit setValue:kitimagePath forKey:@kitImage];
}
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Not understanding NSString's compare:options:range:locale: method
This method isn't doing what I expect it to do (which probably means that I'm expecting the wrong thing.) //= NSRange range = NSMakeRange(0,1); NSString *s1 = @ab; NSString *s2 = @ac; //Just compare the first character NSComparisonResult result1 = [s1 compare:s2 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 1 = %d, result1); //Now swap the order of the strings NSComparisonResult result2 = [s2 compare:s1 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 2 = %d, result2); //= I get a result of -1 both times. Since we are only comparing the first character, shouldn't the result be 0? Thanks for any illumination, Derek Huby ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
create multiple Custom Views
I know this should be really easy, but I've been unsuccessful finding an explanation or tutorial in Apple's documentation or in Google. A couple terse examples did show up, but I did not understand them or they didn't seem to apply. In simplest form, I need to put two Custom Views onto the one window in Interface Builder along with two buttons to control them. Each button should cause a new Bezier line to be drawn on its associated window. The buttons are no problem, but controlling the two Custom Views individually is. Lots of material covers a single Custom View. I have no difficulty creating one and using it, although I do not understand specifically what assigns the Custom View pointer to in -(void)drawRect:(NSRect)rect or –(id)initWithFrame:(NSRect)frameRect. I'm accepting on faith that the system “knows” because there is only one Custom View in the one NSView subclass in these examples. However, I think I need to know how to assign the arguments when there is more than one Custom View, in order to direct the init and draw to the correct Custom View. When I naively drag a second Custom View and AppController onto the window, make the connections, and attempt to associate the two Custom Views and use two IBOutlets to control them, I fail completely. Maybe I'm barking up the wrong tree, trying to do this with only one subclass of NSView for both Custom Views. Questions: Where can I find out how to assign the init and draw arguments to one Custom View or the other? Or is this the wrong approach? Is one subclass required for each Custom View? This seems cumbersome when there are several Custom Views. Are IBOutlets for each Custom View the right approach? Is this the place for lockFocus, to draw on only the correct Custom View? And most important of all, is there a good example with explanation that I can follow? Thanks in advance, Nick___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Return value of performSelector:onThread:?
Hi,
I have a background thread which needs the main thread to create an object
(because part of the initializer isn't thread safe).
The performSelector: methods don't expose the return value of the message, even
with waitUntilDone:YES. I'm not happy with my workaround, which is to use an
instance variable:
@interface MyClass : NSObject {
id tmpObj;
}
@end
@implementation MyClass
- (void)foobar
{
[self performSelectorOnMainThread:@selector(createMyObj) withObject:nil
waitUntilDone:YES];
id myObj = tmpObj;
[tmpObj autorelease];
tmpObj = nil;
// do stuff with myObj
}
- (void)createMyObj
{
tmpObj = // create object
[tmpObj retain]; // retain object, so it doesn't get auto-released
}
@end
Has anyone else got a cleaner technique? Perhaps provide an NSMutableDictionary
to withObject: ?
- Abhi
- - -
Kind Regards,
Abhi Beckert
Senior Programmer
Precedence - Websites. Hosting. Marketing.
1300 363 160
http://precedence.com.au
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Re: Problem using dictionary
On Oct 8, 2010, at 04:47, Remco Poelstra wrote: Is there a reason valueForKey: is documented directly but valueForKeyPath: is not? They're both documented, but it requires familiarity with how to read the Cocoa documentation, which is an important point that goes beyond just this example. The methods are documented as part of the NSKeyValueCoding protocol here: http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/Reference.html It's briefly mentioned, in that document and slightly more definitively in: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/Overview.html that there's a default implementation of NSKeyValueCoding in NSObject. NSDictionary inherits this behavior from NSObject, but because the default 'valueForKeyPath:' is documented as operating in terms of 'valueForKey:', NSDictionary only needs to override the latter, and its own documentation only needs to document the override. The point is to keep in mind that the behavior of objects is documented in their reference guides *and* those of their superclasses. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Not understanding NSString's compare:options:range:locale: method
On Tue, Oct 5, 2010 at 4:48 AM, Derek Huby dh...@mac.com wrote: This method isn't doing what I expect it to do (which probably means that I'm expecting the wrong thing.) //= NSRange range = NSMakeRange(0,1); NSString *s1 = @ab; NSString *s2 = @ac; //Just compare the first character NSComparisonResult result1 = [s1 compare:s2 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 1 = %d, result1); //Now swap the order of the strings NSComparisonResult result2 = [s2 compare:s1 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 2 = %d, result2); //= I get a result of -1 both times. Since we are only comparing the first character, shouldn't the result be 0? From the docs: range The range of the receiver over which to perform the comparison. The range must not exceed the bounds of the receiver. So you are comparing @a to @ac in the first case, and @a to @ab in the second. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Not understanding NSString's compare:options:range:locale: method
Hi Derek, The range argument only applies to the receiver of the message. So, with your first example, you're comparing @a against @ac. Aki On 2010/10/05, at 2:48, Derek Huby wrote: This method isn't doing what I expect it to do (which probably means that I'm expecting the wrong thing.) //= NSRange range = NSMakeRange(0,1); NSString *s1 = @ab; NSString *s2 = @ac; //Just compare the first character NSComparisonResult result1 = [s1 compare:s2 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 1 = %d, result1); //Now swap the order of the strings NSComparisonResult result2 = [s2 compare:s1 options:NSLiteralSearch range:range locale:[NSLocale currentLocale]]; NSLog(@Result 2 = %d, result2); //= I get a result of -1 both times. Since we are only comparing the first character, shouldn't the result be 0? Thanks for any illumination, Derek Huby ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/aki%40apple.com This email sent to a...@apple.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Return value of performSelector:onThread:?
On Thu, Oct 7, 2010 at 10:49 PM, Abhi Beckert a...@precedence.com.au wrote:
I have a background thread which needs the main thread to create an object
(because part of the initializer isn't thread safe).
The performSelector: methods don't expose the return value of the message,
even with waitUntilDone:YES. I'm not happy with my workaround, which is to
use an instance variable:
Has anyone else got a cleaner technique? Perhaps provide an
NSMutableDictionary to withObject: ?
Using GCD:
id myObj;
dispatch_sync(dispatch_get_main_queue(), ^{ myObj = CreateTheObject(); });
--Kyle Sluder
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Re: Return value of performSelector:onThread:?
On Oct 7, 2010, at 10:49 PM, Abhi Beckert wrote: The performSelector: methods don't expose the return value of the message, even with waitUntilDone:YES. I'm not happy with my workaround, which is to use an instance variable: Use the withObject: parameter. If you use a mutable dictionary, you can shove multiple parameters into it for the method to use, and the method can add the return value. Whatever gets triggered after the method is done can examine the dictionary to see the result. Just make sure you do the memory management correctly. -- Seth Willits ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: confused about floats
A stripped down version of your code works as expected here.
- (IBAction) test:(id) sender
{
//set coordinates to x,y - 0,0 to start
float x = 0;
float y = 0;
while (YES) {
NSLog(@x = %f, y = %f, x, y);
x = x+100;
//if coordinates are too wide, start new row - if x300, reset x to 0
and add 100 to y
if(x 300){
x = 0;
y = y+100;
}
}
}
I have in the past run into spooky code generation bugs.
http://www.mailinglistarchive.com/xcode-us...@lists.apple.com/msg07399.html
I wonder if you've run into one too. Does it misbehave in both Debug and
Release builds?
Also, are you sure x is getting past 300?
_murat
On Oct 5, 2010, at 2:07 AM, Amy Heavey wrote:
I've got two float values (x and y) that I'm using to change the coordinates
of a drawing action that is being looped through. I can add a value to x and
it draws the next image along, but I want to test the value of x and if it is
out of bounds I want to reset it to zero and increase y, so I get a grid of
images drawn.
For some reason, even though I can do
x = x+128;
and it moves the image accross, x seems to be null so I can't test against
it, my if statement ' if (x 300){' always fails.
This must be something really simple I just can't see it this morning? I'd
appreciate any help.
Many Thanks
Amy
Full code being used:
[snipped]___
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Re: confused about floats
Just wanted to confirm that this is a repost of the previous thread?
http://lists.apple.com/archives/cocoa-dev/2010/Oct/msg00117.html
--Kyle Sluder
On Tue, Oct 5, 2010 at 2:07 AM, Amy Heavey a...@willowtreecrafts.co.uk wrote:
I've got two float values (x and y) that I'm using to change the coordinates
of a drawing action that is being looped through. I can add a value to x and
it draws the next image along, but I want to test the value of x and if it
is out of bounds I want to reset it to zero and increase y, so I get a grid
of images drawn.
For some reason, even though I can do
x = x+128;
and it moves the image accross, x seems to be null so I can't test against
it, my if statement ' if (x 300){' always fails.
This must be something really simple I just can't see it this morning? I'd
appreciate any help.
Many Thanks
Amy
Full code being used:
- (IBAction)generateKitImages:(id)sender;
{
NSObject *kit;
kit = [[kits selectedObjects] objectAtIndex:0];
NSString* fileName = [[kit valueForKey:@kitName]
stringByAppendingString:@.jpg];
NSString* kitimagePath = self applicationSupportFolder]
stringByAppendingPathComponent:@images]
stringByAppendingPathComponent:@kit]
stringByAppendingPathComponent:fileName];
//NSLog(@Kit Image Path: %@, kitimagePath);
//create new image 300px square
NSImage *targetImage;
NSSize targetSize = NSMakeSize (300, 300);
targetImage = [[NSImage alloc] initWithSize:targetSize];
//select all images for kit
NSArray* kitImages = [kit
valueForKeyPath:@kitItems.kitItemProduct.productImage];
//set coordinates to x,y - 0,0 to start
float x = 0;
float y = 0;
//for each image
NSEnumerator *imageLoop = [kitImages objectEnumerator];
NSString *imgPath;
while ((imgPath = [imageLoop nextObject])) {
NSImage *img = [[NSImage
alloc]initWithContentsOfFile:imgPath];
//NSLog(@Image: %@,img);
//resize to 100px high
//get original size
//NSSize *origSize;
//origSize = [img size];
//calculate scale factor
//[img setScalesWhenResized: YES];
//[img setSize: NSMakeSize (100., 100.)];
//apply image to view
[targetImage lockFocus];
[img drawInRect:NSMakeRect(x,y,100,100)
fromRect:NSMakeRect(x,y,100,100)
operation:NSCompositeCopy
fraction:1];
[targetImage unlockFocus];
//set new coordinates
x = x+100;
//if coordinates are too wide, start new row - if x300,
reset x to 0 and add 100 to y
if(x 300){
x = 0;
y = y+100;
}
}
//apply kit logo to view
//apply kit date (text) to view
//save files out
//create a NSBitmapImageRep
NSBitmapImageRep *bmpImageRep = [[NSBitmapImageRep
alloc]initWithData:[targetImage TIFFRepresentation]];
//add the NSBitmapImage to the representation list of the target
[targetImage addRepresentation:bmpImageRep];
//get the data from the representation
NSData *data = [bmpImageRep representationUsingType: NSJPEGFileType
properties: nil];
//write the data to a file
[data writeToFile: kitimagePath
atomically: NO];
//link images to kit
[kit setValue:kitimagePath forKey:@kitImage];
}
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[iOS] NSUserDefaults-backed Properties
Hello everyone!
I'm working on cleaning up an app that was written by a colleague of mine a
while ago, and one of the things that he did quite a bit was use properties
(declared as @properties, with custom getters/setters) that are actually backed
by NSUserDefaults. Seemingly, this was to provide excellent persistence - no
matter how the app closed or crashed, it always remembered exactly what was
going on. This is still important even with the advent of multi-tasking, as I
am still targeting 3.x, as well as users without multi-tasking.
Here's an example of one of his properties:
- (BOOL)gameShouldBeCounted { return [[NSUserDefaults standardUserDefaults]
boolForKey:@gameShouldBeCounted]; }
- (void)setGameShouldBeCounted:(BOOL)shouldBeCounted {
[[NSUserDefaults standardUserDefaults] setBool:shouldBeCounted
forKey:@gameShouldBeCounted];
[[NSUserDefaults standardUserDefaults] synchronize];
}
Calling synchronize that often can't possibly be efficient, but it seems to be
the only way to make sure that defaults actually get written right away. Does
anyone have any recommendations of how to make this better? I was thinking
about some sort of KVC/O system, where actual ivars were used and
NSUserDefaultsController was set to observe them and update asynchronously, but
I have no idea where to start with a system like that.
Any advice is welcome!
Sincerely,
Carter Allen___
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Re: Return value of performSelector:onThread:?
On Oct 8, 2010, at 11:52 AM, Kyle Sluder wrote:
Using GCD:
id myObj;
dispatch_sync(dispatch_get_main_queue(), ^{ myObj = CreateTheObject(); });
__block id myObj;
dispatch_sync(dispatch_get_main_queue(), ^{ myObj = CreateTheObject(); });
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Re: Problem using dictionary
Op 8 okt 2010, om 20:34 heeft Quincey Morris het volgende geschreven: On Oct 8, 2010, at 04:47, Remco Poelstra wrote: Is there a reason valueForKey: is documented directly but valueForKeyPath: is not? They're both documented, but it requires familiarity with how to read the Cocoa documentation, which is an important point that goes beyond just this example. The methods are documented as part of the NSKeyValueCoding protocol here: http://developer.apple.com/library/mac/#documentation/Cocoa/ Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/ Reference.html It's briefly mentioned, in that document and slightly more definitively in: http://developer.apple.com/library/mac/#documentation/Cocoa/ Conceptual/KeyValueCoding/Concepts/Overview.html that there's a default implementation of NSKeyValueCoding in NSObject. NSDictionary inherits this behavior from NSObject, but because the default 'valueForKeyPath:' is documented as operating in terms of 'valueForKey:', NSDictionary only needs to override the latter, and its own documentation only needs to document the override. That seems reasonable, but makes the documentation harder to read. In the old days where I used Delphi, the inherited methods were all shown as such and it gives a direct overview of what is available. Especially in this case, where the valueForKey* methods are neither mentioned in the NSObject docs, not that NSObject followsNSKeyValueCoding. Well, maybe Apple adds such functionality someday to their doc browser. Kind regards, Remco Poelstra ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
CPP reference operator
can parms be passed to obj-c methods by reference as in name:(type)parm ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
Thanks. I am compiling Objective-C++; -koko On Oct 8, 2010, at 2:57 PM, Dave Carrigan wrote: On Oct 8, 2010, at 1:45 PM, k...@highrolls.net wrote: can parms be passed to obj-c methods by reference as in name:(type)parm Yes, as long as you're compiling as Objective-C++ (i.e., your file extension is .mm). -- Dave Carrigan d...@rudedog.org Seattle, WA, USA ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
On Oct 8, 2010, at 2:45 PM, k...@highrolls.net wrote: can parms be passed to obj-c methods by reference as in name:(type)parm Yes, but only if you use ObjC++. Nick Zitzmann http://www.chronosnet.com/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Problem using dictionary
On 8 Oct 2010, at 3:14 PM, Remco Poelstra wrote: That seems reasonable, but makes the documentation harder to read. In the old days where I used Delphi, the inherited methods were all shown as such and it gives a direct overview of what is available. Especially in this case, where the valueForKey* methods are neither mentioned in the NSObject docs, not that NSObject followsNSKeyValueCoding. Well, maybe Apple adds such functionality someday to their doc browser. In Xcode, Project Class Browser, in the Configure Options sheet, turn on Show Inherited Members. Good luck. — F ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
On Fri, Oct 8, 2010 at 1:45 PM, k...@highrolls.net wrote: can parms be passed to obj-c methods by reference as in name:(type)parm You know, you can try these things out before you ask the mailing list. http://gist.github.com/617545 --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
I did and was getting, and still am, invalid results. So, I asked to be sure I was not violating something and thereby getting invalid results. I ain't that lame ... -koko On Oct 8, 2010, at 3:07 PM, Kyle Sluder wrote: On Fri, Oct 8, 2010 at 1:45 PM, k...@highrolls.net wrote: can parms be passed to obj-c methods by reference as in name:(type)parm You know, you can try these things out before you ask the mailing list. http://gist.github.com/617545 --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
On Fri, Oct 8, 2010 at 2:09 PM, k...@highrolls.net wrote: I did and was getting, and still am, invalid results. So, I asked to be sure I was not violating something and thereby getting invalid results. I ain't that lame ... In that case, be more forthcoming in describing your specific problem. Can I do X? is far less helpful than When I try to do X, the compiler complains about Y and then my cat coughs up a hairball, even though the latter might contain a red herring. So what's the specific problem you're having with using reference types as arguments to Objective-C methods? Include code demonstrating the problem for best results. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Making Java Calls from Objective-C !!
Hi, I want to know how to make java calls from Obj-C. (Java Bridge Seems to be deprecated). Is it possible with out bridge ? If yes , Can any body help me on Where to start ? Thanks, Kongara___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Making Java Calls from Objective-C !!
On Oct 8, 2010, at 3:25 PM, Naresh Kongara wrote: Hi, I want to know how to make java calls from Obj-C. (Java Bridge Seems to be deprecated). Is it possible with out bridge ? If yes , Can any body help me on Where to start ? Under normal circumstances I would be tempted to say STFW, except that, as you pointed out, a lot of the information out there on the Web is obsolete. The Java Bridge, for instance, was removed from Snow Leopard. So this is actually a good question. So I found this, which has an answer that is not use the bridge but I haven't tried it myself: http://stackoverflow.com/questions/1822549/calling-java-library-from-objective-c-on-mac Nick Zitzmann http://www.chronosnet.com/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Making Java Calls from Objective-C !!
Hi, I think rococoa is for making Objective-C calls from Java, not in opposite way (making Java Calls from Objective-C). Thanks. Kongara On Oct 8, 2010, at 2:34 PM, Rui Pacheco wrote: Just Objective-C or Cocoa? Try this: https://rococoa.dev.java.net/ On 8 October 2010 22:25, Naresh Kongara nkong...@apple.com wrote: Hi, I want to know how to make java calls from Obj-C. (Java Bridge Seems to be deprecated). Is it possible with out bridge ? If yes , Can any body help me on Where to start ? Thanks, Kongara___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/rui.pacheco%40gmail.com This email sent to rui.pach...@gmail.com -- Best regards, Rui Pacheco ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Making Java Calls from Objective-C !!
Hi Yes, it can be done but you need to become good friends with JNI. http://developer.apple.com/library/mac/#technotes/tn2005/tn2147.html Good luck! -daryl -- Daryl Thachuk Montage Technologies Inc. http://www.montagetech.com On Oct 8, 2010, at 3:25 PM, Naresh Kongara wrote: I want to know how to make java calls from Obj-C. (Java Bridge Seems to be deprecated). Is it possible with out bridge ? If yes , Can any body help me on Where to start ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
Well, it appears that the problem is not a language problem. I was passing a reference to a CPP object instance, doing some work and then setting member variables in the CPP object instance. Upon inspecting the CPP object instance member variables upon return they were displaying 'garbage' in the debugger. This is what prompted the question. Letting the code run and using NSLog to see the values they are good. Ergo, this seem to be a 'bug' in the Xcode debugger. Cost me lots of time though. -koko On Oct 8, 2010, at 3:16 PM, Kyle Sluder wrote: On Fri, Oct 8, 2010 at 2:09 PM, k...@highrolls.net wrote: I did and was getting, and still am, invalid results. So, I asked to be sure I was not violating something and thereby getting invalid results. I ain't that lame ... In that case, be more forthcoming in describing your specific problem. Can I do X? is far less helpful than When I try to do X, the compiler complains about Y and then my cat coughs up a hairball, even though the latter might contain a red herring. So what's the specific problem you're having with using reference types as arguments to Objective-C methods? Include code demonstrating the problem for best results. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Problem connecting to Oracle with app run from XCode
Greg Guerin wrote: Timothy Mowlem wrote: I can run the XCode built app as well from the command line after setting LD_LIBRARY_PATH (as a non-admin user and without using sudo). If that env-var is the cause, then printf() the value of it in both cases, and manually compare them. Use the getenv() C function. You might also read the Mac OS X man page for 'dyld', if you haven't done so yet. Xcode Help Open man Page... -- GG Thanks for the input. I might have been slightly misleading but I think LD_LIBRARY_PATH is fine. For a while I was getting a link error at runtime until I read the XCode documentation and found the correct place to set the env var to run it within XCode, by selecting the executable under the Executables group, choosing GetInfo and adding the env var under the environment area of the Arguments tab. I confirmed that it is finding and using the library using printfs. I have also discovered that if I start XCode from the terminal, which means it WILL pick up the environment from the shell, that the application DOES then run successfully when launched from XCode. So the conclusion is that something in my shell environment that is not present in XCode when it is launched normally is causing the problem. Has anyone seen anything similar? Thanks. Tim___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Making Java Calls from Objective-C !!
Naresh Kongara wrote: I want to know how to make java calls from Obj-C. (Java Bridge Seems to be deprecated). Is it possible with out bridge ? If yes , Can any body help me on Where to start ? Use JNI. Also see this Java-Dev message: http://lists.apple.com/archives/java-dev/2009/Oct/msg00497.html Google this: JavaNativeFoundation And you might get a better answer by asking on Java-Dev: http://lists.apple.com/mailman/listinfo/java-dev -- GG ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
UITableViewCell Display Issue
In my table view, when a user touches a row, I want to change the alpha value of a subview within the row's content view via animation as well as insert some rows below that one or remove some rows from below that one. I'm able to animate the insertion and deletion of the rows from under the touched row. But I can't seem to animate the alpha value for a subview. The crazy part about it all is even though the subview doesn't appear when I touch the row, if I slide the row out of view and back in view again, it looks the right way. Can anyone tell me what I'm doing wrong? Thanks! Jason ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Making Java Calls from Objective-C !!
Nick Zitzmann wrote: So I found this, which has an answer that is not use the bridge but I haven't tried it myself: http://stackoverflow.com/questions/ 1822549/calling-java-library-from-objective-c-on-mac One of its answers is use TCP/IP. I have done that, and it works well. Same-process JVM via JNI's invocation API, or different process running /usr/bin/java via NSTask. For security, confine the network to loopback interface (lo0), which is quite easy to do in Java. I chose JSON as the data format: simple, compact, readily available libs for Cocoa and Java. I also used CocoaAsyncSocket on the Objective-C side, which simplified use of sockets and streams. YMMV. -- GG ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Freeing the property list returned by class_copyPropertyList()?
How do I free the array I get back from class_copyPropertyList()? TIA, -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Freeing the property list returned by class_copyPropertyList()?
free(). Dave On Oct 8, 2010, at 5:22 PM, Rick Mann wrote: How do I free the array I get back from class_copyPropertyList()? TIA, -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/davedelong%40me.com This email sent to davedel...@me.com smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Trouble calling class_addIvar()
I'm trying to add an ivar to a (sub)class in the base class' +initialize method. I'm not sure if it's too late to do it at this point or not. If I can't do it here, i don't know where to make the call. I'm calling it like this: char const* ivarNameCString = ivarName.UTF8String; size_t size = sizeof (NSData*); uint8_t align = log2(size); bool success = class_addIvar(self.class, ivarNameCString, size, align, @); The values for the parameters end up being: ivarNameCString:mOutputDataCacheChannel1 size: 8 align: 3 The documentation doesn't specify what the last parameter should be, other than to name it types. I assumed that was supposed to be a type string, although I don't know why you would specify more than one. Anyway, this returns false, but I have no idea why. Can anyone help me out? Thanks! -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
On Fri, Oct 8, 2010 at 4:39 PM, Rick Mann rm...@latencyzero.com wrote: I'm trying to add an ivar to a (sub)class in the base class' +initialize method. I'm not sure if it's too late to do it at this point or not. If I can't do it here, i don't know where to make the call. From the documentation: Adding an instance variable to an existing class is not supported. http://developer.apple.com/library/ios/#documentation/cocoa/reference/ObjCRuntimeRef/Reference/reference.html Use objc_setAssociatedObject instead. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
I think you can only use class_addIvar() in between corresponding calls to objc_allocateClassPair() and objc_registerClass(). Docs: http://developer.apple.com/library/ios/documentation/cocoa/reference/ObjCRuntimeRef/Reference/reference.html#//apple_ref/doc/uid/TP40001418-CH1g-SW10 Dave On Oct 8, 2010, at 5:39 PM, Rick Mann wrote: I'm trying to add an ivar to a (sub)class in the base class' +initialize method. I'm not sure if it's too late to do it at this point or not. If I can't do it here, i don't know where to make the call. I'm calling it like this: char const* ivarNameCString = ivarName.UTF8String; size_t size = sizeof (NSData*); uint8_t align = log2(size); bool success = class_addIvar(self.class, ivarNameCString, size, align, @); The values for the parameters end up being: ivarNameCString: mOutputDataCacheChannel1 size: 8 align:3 The documentation doesn't specify what the last parameter should be, other than to name it types. I assumed that was supposed to be a type string, although I don't know why you would specify more than one. Anyway, this returns false, but I have no idea why. Can anyone help me out? Thanks! -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/davedelong%40me.com This email sent to davedel...@me.com smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
On Oct 8, 2010, at 16:42:18, Kyle Sluder wrote: On Fri, Oct 8, 2010 at 4:39 PM, Rick Mann rm...@latencyzero.com wrote: I'm trying to add an ivar to a (sub)class in the base class' +initialize method. I'm not sure if it's too late to do it at this point or not. If I can't do it here, i don't know where to make the call. From the documentation: Adding an instance variable to an existing class is not supported. http://developer.apple.com/library/ios/#documentation/cocoa/reference/ObjCRuntimeRef/Reference/reference.html Yes, I read that. I had hoped that I'd be able to add ivars before the class was instantiated. In this case, the class is being loaded dynamically at run time. Is there no way to get in the middle of the load and add an ivar? In any case, sure seems like I ought to be able to do it in +initialize. I'll try objc_setAssociatedObject(). Thanks. -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
On Fri, Oct 8, 2010 at 5:00 PM, Rick Mann rm...@latencyzero.com wrote: Yes, I read that. I had hoped that I'd be able to add ivars before the class was instantiated. In this case, the class is being loaded dynamically at run time. Is there no way to get in the middle of the load and add an ivar? In any case, sure seems like I ought to be able to do it in +initialize. The documentation states you can't add ivars to classes that have already been registered. In order for a class to receive +initialize, it logically must already have been registered with the runtime. Therefore, it's quite apparent why class_addIvar() can't be called from +initialize. The fact that you want to add instance variables to a class at all is a terrible code smell. Like Fresh Kills Landfill bad. What are you trying to achieve? --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
Oh. I can't even really use this. I don't know what I need to associate at runtime, at which point I know what it is by a string value. Since I can't use a string value as a key, I can't really make the association. I could associate an NSMutableDictionary, but if I do that, I may as well just make that a member of my base class. On Oct 8, 2010, at 17:12:28, Kyle Sluder wrote: On Fri, Oct 8, 2010 at 5:00 PM, Rick Mann rm...@latencyzero.com wrote: Yes, I read that. I had hoped that I'd be able to add ivars before the class was instantiated. In this case, the class is being loaded dynamically at run time. Is there no way to get in the middle of the load and add an ivar? In any case, sure seems like I ought to be able to do it in +initialize. The documentation states you can't add ivars to classes that have already been registered. In order for a class to receive +initialize, it logically must already have been registered with the runtime. Therefore, it's quite apparent why class_addIvar() can't be called from +initialize. The fact that you want to add instance variables to a class at all is a terrible code smell. Like Fresh Kills Landfill bad. What are you trying to achieve? --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
On Oct 8, 2010, at 17:12:28, Kyle Sluder wrote: The documentation states you can't add ivars to classes that have already been registered. In order for a class to receive +initialize, it logically must already have been registered with the runtime. Therefore, it's quite apparent why class_addIvar() can't be called from +initialize. Hmm...thinking about it a bit more...how do dynamically-synthesized property ivars work (where you just @synthesize them without declaring an ivar)? Do they use class_addIvar()? That suggests I'm wrong about class layout. -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
main window disappears on resize
I have a document based application with a main window that, when I try to resize the window, the window just completely disappears. The application doesn't crash and I can open up another window by 'Project -- New' in the main menu. And of course if I try to resize it, it will disappear. And my debugger doesn't show anything when it disappears. Any idea how to help track this problem down? Any help much appreciated. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: main window disappears on resize
On Fri, Oct 8, 2010 at 5:28 PM, Shane software.research.developm...@gmail.com wrote: I have a document based application with a main window that, when I try to resize the window, the window just completely disappears. The application doesn't crash and I can open up another window by 'Project -- New' in the main menu. And of course if I try to resize it, it will disappear. And my debugger doesn't show anything when it disappears. Any idea how to help track this problem down? Break on -[NSWindow orderOut:]? --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
ivars and fundamental types
Can I not use the objective-C runtime to get and set an objects ivar's if they are of primitive types like int and float? -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
SRV record lookup
In one of my apps (Cocoa Desktop 10.6+ - not iOS) I need to perform some SRV lookups; I know there are a few ways to do this, but I'd like to know if anyone can speak from experiencefrom this link I can see that there are indeed a few different methodsany ideas? http://stackoverflow.com/questions/258284/srv-record-lookup-with-iphone-sdk Thanks, jeremy smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Trouble calling class_addIvar()
On Oct 8, 2010, at 5:27 PM, Rick Mann wrote: Hmm...thinking about it a bit more...how do dynamically-synthesized property ivars work (where you just @synthesize them without declaring an ivar)? Do they use class_addIvar()? That suggests I'm wrong about class layout. It be compilation time code generation with the new runtime(s), the compiler can generate the storage during compilation of the class's implementation b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CPP reference operator
On Oct 8, 2010, at 4:20 PM, k...@highrolls.net wrote: Ergo, this seem to be a 'bug' in the Xcode debugger. Cost me lots of time though. Sorry, but if you're going to use Objective-C++, you're going to have get used to that. The debugger ***SUX*** at display of C++ types, so when you see something that you can't understand, step 1 is nearly always to add some logging so that you can see the real values. Although most of the time this is not really a problem, since most of the time instead of displaying garbage, it just refuses to display any values. -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ivars and fundamental types
On Fri, Oct 8, 2010 at 9:50 PM, Rick Mann rm...@latencyzero.com wrote: Can I not use the objective-C runtime to get and set an objects ivar's if they are of primitive types like int and float? Of course you can - it would be useless otherwise. Where did you get the idea you can't? sherm-- -- Cocoa programming in Perl: http://camelbones.sourceforge.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ivars and fundamental types
On Oct 8, 2010, at 20:04:13, Sherm Pendley wrote: On Fri, Oct 8, 2010 at 9:50 PM, Rick Mann rm...@latencyzero.com wrote: Can I not use the objective-C runtime to get and set an objects ivar's if they are of primitive types like int and float? Of course you can - it would be useless otherwise. Where did you get the idea you can't? object_setIvar() takes type id. -- Rick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ivars and fundamental types
object_setIvar() takes type id. object_getInstanceVariable()? outValue: On return, contains a pointer to the value of the instance variable. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ivars and fundamental types
And its inverse, object_setInstanceVariable, which takes a void* to the new value of the ivar. Cheers, Dave On Oct 8, 2010, at 10:18 PM, Dave Keck wrote: object_setIvar() takes type id. object_getInstanceVariable()? outValue: On return, contains a pointer to the value of the instance variable. smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
