Re: How to get music list?
I have a problem getting the iTunes list, and then making the tableview display the iTunes list. The problem, is actually getting started. Which class should I use? I wrote some sample code a couple months ago to read in the playlist names from the iTunes XML file. It might help get you started if you decide to go that route. You can find it here: http://codehackers.net/blog/?p=65 - Bob Warwick ___ 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 [EMAIL PROTECTED]
Re: Array help!
From a quick glance, I'd say you've connected your tableview outlet
to the scrollview in Interface Builder, not the tableview. Tableviews
are contained within scrollviews. You can confirm by checking what
the outlet's connected to under the 'outlets' tab of the info panel in
IB.
-Bob Warwick
On 17-Jul-08, at 5:50 PM, Eric Lee wrote:
I'm doing Challenge from Chapter 6 in the 3rd edition of the Cocoa
Programming for mac OS X book, and I've ran into some trouble.
While I'm trying to reload data, there's always this warning the says:
Warning: 'NSScrollView' may not respond to '-reloadData' (Messages
without a matching method signature will be assumed to return 'id'
and accept '...' as arguments)
I have no idea what it means, and no idea how to correct it.
here's the code:
App Controller.m
-
#import AppController.h
@implementation AppController
- (id) init
{
[super init];
array = [[NSMutableArray alloc] init];
return self;
}
- (NSInteger)numberOfRowsInTableView:aTableView
{
return [array count];
}
- (id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn
row:(NSInteger)rowIndex
{
return [array objectAtIndex:rowIndex];
}
- (void)tableView:(NSTableView *)anotherTableView
setObjectValue:(id)anObject
forTableColumn:(NSTableColumn *)anotherTableColumn
row:(NSInteger)rowIndex
{
[array replaceObjectAtIndex:rowIndex withObject:anObject];
}
- (IBAction)addThing:(id) sender
{
NSString *string = [textField stringValue];
NSLog(@Got string %@ from textfield, string);
[array addObject:string];
[tableView reloadData];
}
@end
AppController.h
--
#import Cocoa/Cocoa.h
@interface AppController : NSObject {
NSMutableArray *array;
IBOutlet NSTextField *textField;
IBOutlet NSScrollView *tableView;
}
- (IBAction)addThing:(id)sender;
@end
---
I've connected everything. Also, I think there are other problems,
since when I press a button that's supposed to add an object into
the TableView, nothing happens, even though a log appears on the
console.
Thanks!
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Re: how to save keyboard shortcuts?
On 25-Jun-08, at 12:04 PM, HAMSoft Admin wrote: I'm really new at this so please be kind! I recently learned how to make menu item keyboard shortcuts for my program. The problem is that on the next launch of the program the shortcuts are gone, so they are not being automatically saved. Is there a setting in IB for my menu to enable auto-saving of them or do I have to do it manually? I'm setting them with something like this: [menuitem setKeyEquivalentModifierMask:NSControlKeyMask | NSCommandKeyMask]; [menuitem setKeyEquivalent:@U]; If I have to do it manually I'm not sure how. First to get the modifier keys for a particular menu item I'm using this... int thekmm = [menuitem keyEquivalentModifierMask]; But I don't understand the returned integer. Plus do I have to create an array of modifiers and keys for every menu item in my program and save/restore that on every launch? Thant doesn't make sense, so there must be an easier way. Thanks, Hank Hello - Have you considered setting your keyboard shortcuts in IB? Just select your menu item in IB and change the Key Equiv. from the attributes panel. -Bob Warwick ___ 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 [EMAIL PROTECTED]
Re: Table View/Array Troubles
On 13-Jun-08, at 2:21 AM, Kyle Sluder wrote:
On Thu, Jun 12, 2008 at 2:00 AM, Bob Warwick
[EMAIL PROTECTED] wrote:
Calling the NSMutableArray convenience method array will return an
autoreleased object. You should do this instead:
- (id) init
{
[super init];
myNotes = [[NSMutableArray alloc] init];
return self;
}
Actually, it should really be like this (I've been pedantically
explicit):
- (id)init
{
self = [super init];
if(self != nil)
{
myNotes = [[NSMutableArray alloc] init];
}
return self;
}
Note that -init is NOT required to return the same object that self
refers to. Therefore it is always required that you re-assign self in
your overridden initializer if you need to access it, and you must
return that modified self*.
--Kyle Sluder
Of course you're correct here, and right to be absolutely pedantic in
regards to how to write an init method properly. In the case of the
original question, NoteController and Note were both subclasses of
NSObject which I believe should behave as expected in the my example.
To indulge my own curiosity, in a case like this where you know the
behaviour of the superclass like NSObject, is there any advantage to
doing it Kyle's way as opposed to my example?
-Bob Warwick
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Re: Table View/Array Troubles
On 12-Jun-08, at 2:16 AM, Gabriel Shahbazian wrote:
Hi,
I've posted the source to an app I'm working on. If someone can take
a look and tell my why my tableview is not working with my array, it
would be of great help.
Source:
http://novisdesign.net/Labs/Alien%20Notes.zip
-Gabe
I found a couple problems in a quick look through your source:
Your NoteController init method looks like this:
- (id) init
{
[super init];
myNotes = [NSMutableArray array];
return self;
}
Calling the NSMutableArray convenience method array will return an
autoreleased object. You should do this instead:
- (id) init
{
[super init];
myNotes = [[NSMutableArray alloc] init];
return self;
}
Also, you populate your tableview by calling the title method of a
given note. Your title method looks like this:
- (NSString *) title
{
return [self title];
}
You're looking to access the title variable of the note instance, but
instead you just call the title method again. This creates a big ol'
neverending recursive call. You're wanting to do this:
- (NSString *) title
{
return title;
}
I'm also not too confident about how you're handling setting the title
and content of a note. Personally I'd use an NSMutableString for both
of those and set the content of the string when setTitle: or
setContent: is called.
-Bob Warwick
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Re: Regular Expressions?
On 6-Jun-08, at 4:31 AM, Cemil Browne wrote: Hi all, This might be a really silly question - but am I missing something obvious? Is there any support at all for regular expressions in the Cocoa libraries? I can't find anything and I've found some third-party frameworks - but surely something so necessary must be buried in the string classes somewhere? How would I do a simple substring search or replace in 10.4? Thanks, Cemil Hello - There is no regular expression support in Cocoa. You might find http://www.cocoadev.com/index.pl?RegularExpressions useful in helping to find a library to do it for you. Search and replace in Cocoa looks like this: NSString *someString = @The quick brown fox; NSString *newString = [someString stringByReplacingOccurrencesOfString:@quick withString:@slow]; You can find this in the NSString documentation. It creates a new string with the substring replaced. -Bob Warwick [EMAIL PROTECTED] ___ 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 [EMAIL PROTECTED]
Re: Regular Expressions?
Hello - Whoops! I can read. You use the replaceOccurrencesOfString:withString:options:range: method in NSMutableString. It works on the same instance of the string instead of creating a new string. For example: NSMutableString *someString = [NSMutableString stringWithString:@The quick brown fox]; [someString replaceOccurrencesOfString:@quick withString:@slow options:NSCaseInsensitiveSearch range:NSMakeRange(0, [someString length])]; -Bob Warwick [EMAIL PROTECTED] On 6-Jun-08, at 4:54 AM, Cemil Browne wrote: Bob, Thanks for the reply... However, stringByReplacingOccurrencesOfString only works in Tiger, though, right? What did everyone do last year for it? -Cemil On 06/06/2008, at 5:51 PM, Bob Warwick wrote: Hello - There is no regular expression support in Cocoa. You might find http://www.cocoadev.com/index.pl?RegularExpressions useful in helping to find a library to do it for you. Search and replace in Cocoa looks like this: NSString *someString = @The quick brown fox; NSString *newString = [someString stringByReplacingOccurrencesOfString:@quick withString:@slow]; You can find this in the NSString documentation. It creates a new string with the substring replaced. -Bob Warwick [EMAIL PROTECTED] On 6-Jun-08, at 4:31 AM, Cemil Browne wrote: Hi all, This might be a really silly question - but am I missing something obvious? Is there any support at all for regular expressions in the Cocoa libraries? I can't find anything and I've found some third-party frameworks - but surely something so necessary must be buried in the string classes somewhere? How would I do a simple substring search or replace in 10.4? Thanks, Cemil ___ 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/warwick%40codehackers.net This email sent to [EMAIL PROTECTED] ___ 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 [EMAIL PROTECTED]
Re: Best Practice for Returning Immutable Objects?
On 3-Jun-08, at 12:56 PM, Karl Moskowski wrote:
I have a few methods that return NSData objects, but the objects are
created and manipulated as NSMutableData, and then copied to an
immutable version along these lines:
NSMutableData *myData = [NSMutableData data];
:
:
return [NSData dataWithData:myData];
Would it be sufficient to cast, like this?
:
return (NSData *)myData;
Does this generalize to other non-collection classes, e.g., NSString?
Hello -
It depends if you actually want to return an immutable object or not.
When you call a method, the return type isn't a guarantee that the
returned value will be a member of the specific class shown, but
rather a member of or a subclass of the class shown. You can return
that NSMutableData without casting it from a method which says it
returns NSData and it's still technically valid.
For example, in these three classes only the first returns an NSData
object, the other two return NSMutableData objects
- (NSData *) returnImmutableData {
NSMutableData *someData = [NSMutableData data];
return [NSData dataWithData:someData];
}
- (NSData *) returnSomeData {
NSMutableData *someData = [NSMutableData data];
return (NSData *)someData;
}
- (NSData *) returnSomeOtherData {
NSMutableData *someOtherData = [NSMutableData data];
return someOtherData;
}
In general, I'd say it's best to return what you're actually claiming
to return.
-Bob Warwick
[EMAIL PROTECTED]
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