The Change Time Scale slider in Apple's Instruments application implements a
novel self centering time based algorithm. A very interesting approach to a
slider. Perhaps you also need to think outside the box and implement the
desired behavior in a custom control.
--Richard Somers
On Jul 31
{
dispatch_async(_queue, ^{
for ( ... ) {
if (_isQueueCanceled == YES) {
break;
} else {
// do work
}
}
});
}
When invalidateQueue returns the thread has been canceled.
Richard Somers
Just curious. Which Core Data document format are you trying to reverse
engineer: XML, binary, SQLite, or all of them?
Richard Somers
On Jun 25, 2013, at 8:31 PM, Michael Crawford mdcrawf...@gmail.com wrote:
Take a guess at the document format.
Write an importer that reads that format.
Put
when
adding objects to the managed object context.
Does anyone have any insight on how to determine what objects are added or
removed from an NSArrayController?
Thanks,
Richard Somers
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, at 12:10 PM, Erik Stainsby erik.stain...@roaringsky.ca wrote:
I'd also recommend Scott Stevenson's Cocoa and Objective-C: Up and Running
and follow that with Stephen G. Kochan's Programming in Objective-C
That would also be a good choice.
--Richard Somers
image, and then somehow tell the system to use that.
--Richard Somers
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offscreen rendering machine updating or replacing
the cursor image every so often.
--Richard Somers
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directory and start fresh again. The whole process takes
about a minute and has been bullet proof.
I still use Git for reviewing history, managing branches, merging changes from
one branch to another, etc., but this modified workflow has made my day to day
development go much faster.
--Richard
--Richard Somers
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https
of preference plist
file aliases. One of the items is an alias to com.apple.iWork.Pages.plist. Why
would my app need default access to the Pages preference plist file? This seems
like a violation of sandboxing.
A lot of this simply does not make sense. What am I missing?
--Richard Somers
plist file is readable but not writable.
--Richard Somers
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Help
panel let the user choose a
location where a save was not allowed and subsequently would result in failure.
--Richard Somers
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try swizzling.
--Richard Somers
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On Sep 10, 2012, at 5:59 AM, Motti Shneor wrote:
Although I don't need such heavy-weapons, and I don't at all deal with
programmatic bindings here, I'd still like (if possible) to learn some more
about the implementation of your internal tools. I didn't yet have a chance
to work with
On Sep 9, 2012, at 3:32 AM, Motti Shneor wrote:
- (NSUInteger)isObserver:(id)object on keyPath:(NSString *)keyPath
withContext:(void *)context]; // the returned number is the count of same
observances with 0 as not-observing).
and something like
- (BOOL)removeObserver:(id)object;
On Sep 7, 2012, at 3:55 PM, Jens Alfke wrote:
On Sep 7, 2012, at 12:01 PM, Richard Somers rsomers...@awinets.com wrote:
MyApp(469,0x1009fbcc0) malloc: *** error for object 0x12f6b19a0: pointer
being freed was not allocated *** set a breakpoint in malloc_error_break to
debug
Following
I have an intermittent error that I can not make any progress on solving so I
thought I would ask for some help from someone more experienced than myself in
debugging. Program execution halts in Xcode with the following error:
MyApp(469,0x1009fbcc0) malloc: *** error for object 0x12f6b19a0:
On Jul 30, 2012, at 12:19 PM, ecir hana wrote:
when jumping from line to line in a textview with up and down keys, it
exhibits this scrolling behavior - when the cursor is at the very top and I
hit up (and vice versa), it scrolls the document half page up, that is,
the current line is now in
Controls in the window-frame area (that is, in the toolbar or bottom bar)
normally have a textured style as stated in the OS X Human Interface
Guidelines. In 10.7 Lion textured controls became semi-transparent with some of
the background showing through. This results in most window-frame
On Jun 24, 2012, at 11:56 PM, Abhijeet Singh wrote:
I want to perform some action in my application whenever user presses any key
on keyboard or uses the mouse. How can I trap these events.
One way to do this would be to subclass NSApplication and override sendEvent:.
The documentation
The Mac App Store guidelines indicates that Apps that are beta, demo,
trial, or test versions will be rejected.
So if potential customers need to go to my website to download a demo version
then I might as well offer the retail version for sale on my website also. Why
use the Mac App Store?
John and Mikkel,
Thanks for the insight on multiple contexts in Core Data. It helps a bunch.
--Richard
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I have a question about multiple contexts.
First a quote from the Core Data Programming Guide - To consider this from a
different perspective, a given object in a persistent store may be edited in
more than one context simultaneously. Each context, however, has its own
managed object that
On May 8, 2012, at 3:01 AM, ecir hana wrote:
I create a window like this:
id window = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 200,
200) styleMask:NSTitledWindowMask backing:NSBackingStoreBuffered
defer:NO] autorelease];
[window cascadeTopLeftFromPoint:NSMakePoint(20,20)];
On May 8, 2012, at 8:51 AM, ecir hana wrote:
Yes, document-based.
However, not sure if it is an issue, but I have my own subclassed window
controller. The docs also say that the default for shouldCascadeWindows is
YES. I tried to set it to YES in setShouldCascadeWindows:, without luck.
On May 2, 2012, at 7:19 AM, ecir hana wrote:
- I saw that Xcode named the Info.plist differently (it prepends my project
name to it) - is it ok just to call it Info.plist? Is there any convention?
On May 1, 2012, at 8:50 AM, Fritz Anderson wrote:
NIBs _are_ how it works. They don't contain or generate code. They don't
contain or generate scripts. They don't exercise much of the API you're
trying to use. They contain archived objects and their connections.
True, but the beginner may
I have a number of controls with custom bindings that are programmatically
added to a view hierarchy in a window. Calling –unbind: on these controls when
the window is closes is a challenge.
But it actually does not seem to matter. If –unbind: is never called and the
window is closed there are
On Apr 28, 2012, at 1:30 PM, Quincey Morris wrote:
To get an answer on this, you'll probably need to say which memory model
you're using: GC, ARC or traditional RR.
I am using traditional retain and release.
--Richard
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On Apr 28, 2012, at 1:30 PM, Quincey Morris wrote:
To get an answer on this, you'll probably need to say which memory model
you're using: GC, ARC or traditional RR.
Actually now that I have done a little more research it appears that my
question regarding programmatically calling -unbind:
, 2012, at 10:17 AM, Richard Somers rsomers...@awinets.com wrote:
I have a number of controls with custom bindings that are programmatically
added to a view hierarchy in a window. Calling –unbind: on these controls
when the window is closes is a challenge.
Why? Someone has to have called -bind
On Apr 2, 2012, at 11:01 PM, Jerry Krinock wrote:
That is expected behavior. The tildefied document, as I call it (tilde =
~) is in fact the old document, prior to migration, which Core Data has
renamed. It is an undocumented feature of Core Data. Apparently, the idea
is that, with help
On Apr 2, 2012, at 4:20 PM, Richard Somers wrote:
Can anyone shed some light on this?
It appears that others have also recently experienced frustration with
automatic lightweight migration and have come up with zero answers.
Jan 26, 2012
http://stackoverflow.com/questions/9014668/core-data
When tabbing into a text field containing text, the text is selected. When
clicking into a text field containing text, the I-beam cursor indicates the
insertion point.
How can I make clicking into text field containing text, initially select all
the text just like tabbing does?
Thanks for
On Mar 30, 2012, at 3:22 PM, Richard Somers wrote:
When tabbing into a text field containing text, the text is selected. When
clicking into a text field containing text, the I-beam cursor indicates the
insertion point.
How can I make clicking into text field containing text, initially
On Mar 19, 2012, at 10:20 PM, Charles Srstka wrote:
As everyone knows, if you have a view with a bunch of subviews and you’ve got
NSLayoutConstraints set up for everything, in many cases you might end up
with a minimum or maximum size for the view beyond which the constraints are
On Mar 17, 2012, at 6:12 PM, Roland King wrote:
So often I find I start with
@synthesize foo=_foo;
and by the time I get to the end of the project I've written custom foo: and
setFoo: methods which do something else too.
I have also done that but I recently read a blog where the
On Mar 6, 2012, at 2:28 PM, Mikkel Islay wrote:
Does anyone know the reason why the UIKit-additions for NSString, NSValue
etc. aren't mentioned in the respective class references in the Apple
documentation for iOS?
It appears that the same NSString Class Reference documentation for the Mac
On Mar 1, 2012, at 7:12 AM, Eric Giguere wrote:
I'm on the verge of loosing my sanity...
I've been hitting this error for a long time now.
If I try deleting the C object before saving the new stuff, I get this error:
Domain=NSCocoaErrorDomain Code=134030 The operation couldn’t be
SOLVED - Thanks for all the comments.
On Feb 11, 2012, at 11:56 PM, Graham Cox wrote:
Making it an object is easy and usually it turns out that the desire to
resist doing that is misguided, based on some faulty assumptions.
I decided to resist no longer and make my custom strut an object. I
On Feb 12, 2012, at 1:28 AM, Kyle Sluder wrote:
Hmm. The Foundation Release Notes for 10.5 indicate that KVC supports
arbitrary structs (see section titled Support for Arbitrary Types in KVC and
KVO)
Yes I have read that several times. It seems to be at odds with the Core Data
Core Data Question
I have a custom struct that I would like to make key-value coding compliant so
it will work with Core Data as a non-standard persistent attribute. Is it
possible to make a custom struct key-value coding compliant?
I would rather not store it in the managed object as an
On Jan 30, 2012, at 6:27 PM, Jens Alfke wrote:
On Jan 30, 2012, at 1:34 PM, Richard Somers wrote:
Why does Core Data change entity names to upper case and attribute names to
lower case in the XML store?
I don’t know; but the format of that XML is supposed to be private to
CoreData
Why does Core Data change entity names to upper case and attribute names to
lower case in the XML store?
--Richard
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On Dec 15, 2011, at 8:29 AM, Mike Abdullah wrote:
I'm trying to track down a bug and have a copy of a customer's console log to
help me. There's rather a lot of messages like this:
open on /Users/foo/bar/mydocument.package/DSC_0221.jpg: File exists
Searching the web has been
On Nov 25, 2011, at 6:17 PM, Steven Spencer wrote:
I'm using a NSTrackingArea in a view to receive mouseMoved events.
The cursor location in the mouseMoved and mouseDragged events have
non-integer coordinates (as expected).
e.g. x:140.601562 y:128.082031
However, the mouseDown and mouseUp
On Nov 22, 2011, at 1:59 AM, Gustavo Pizano wrote:
I will make some debugging on my friend MBA and see if something's wrong in
the code, if not, then I guess I will be filling up a Bug report, because
this issue makes no sense to me.
Is this done completely in Interface Builder or in code.
On Nov 21, 2011, at 5:11 AM, Peter Hudson wrote:
I have an NSTableView whose position I want to control purely programatically.
How do I stop the user from changing its position using the mouse - including
two finger swipe gestures ?
The position of the NSTableView is set with
On Nov 21, 2011, at 3:08 PM, Gustavo Pizano wrote:
So im wondering what its going on because I have tried the behavior on 2
iMacs, 2 MPB and 2 MBA, on the latest one is the only one that doesn't behave
as expected. What can it be?
Perhaps it is a graphics card issue. One way to check out
On Nov 16, 2011, at 6:16 PM, Tom Harrington wrote:
I'm finding that if I use nested managed object contexts,
awakeFromInsert will be called twice on new objects.
On Mac OS X 10.7 NSManagedObjectContext can have a parentContext.
Perhaps this would be applicable.
--Richard
The normal pattern for Interface Builder Outlets is assign but I have an outlet
that must be retained to work corectly. The outlet is not in File's Owner but
is in a custom view in a window.
// Interface
@property (retain) IBOutlet NSArrayController *myController;
// Implementation
@synthesize
On Nov 18, 2011, at 9:31 AM, Kyle Sluder wrote:
On Fri, Nov 18, 2011 at 8:23 AM, Richard Somers wrote:
The normal pattern for Interface Builder Outlets is assign but I have an
outlet that must be retained to work corectly. The outlet is not in File's
Owner but is in a custom view
On Nov 18, 2011, at 12:42 PM, Kyle Sluder wrote:
It means that NSWindowController will balance NSNib's extra -retain.
It doesn't balance the additional -retain from calling your setter.
Consider the following case. The additional -retain from calling setter is not
balanced. The outlet is not
On Nov 18, 2011, at 1:33 PM, Corbin Dunn wrote:
You are probably orphaning (which is a leak), your window controller
subclass. Make sure it's dealloc is called; I'm guessing it won't be. This
isn't shown in leaks, since it isn't a true leak.
Good suggestion. I just checked and the window
On Nov 18, 2011, at 9:23 AM, Richard Somers wrote:
The normal pattern for Interface Builder Outlets is assign but I have an
outlet that must be retained to work corectly. The outlet is not in File's
Owner but is in a custom view in a window.
// Interface
@property (retain) IBOutlet
One way would be to subclass NSWindow and override the designated initializer
-initWithContentRect:styleMask:backing:defer: method. In the initializer you
could query the screen resolution and set the window frame accordingly.
--Richard
On Nov 14, 2011, at 8:10 AM, Koen van der Drift wrote:
Do something like this.
- (void)prepareWindowCollectionBehavior
{
if (MySystemVersion_10_07_OrLater()) {
#ifdef MAC_OS_X_VERSION_10_7
NSWindowCollectionBehavior behavior = [_window collectionBehavior];
behavior = behavior | NSWindowCollectionBehaviorFullScreenPrimary;
I find that not having explicit instance variable declarations lets me focus
the class interface. I think that focusing on the interface is more helpful in
the long run.
--Richard
On Nov 13, 2011, at 12:16 AM, ico wrote:
If so, is it a better approach that just declare the property and let
This can be very confusing but I think it goes something like this.
The default application launched is the version with the highest
CFBundleVersion where CFBundleVersion is a monotonically increasing string,
comprised of one or more period-separated integers.
In the Xcode 4 target summary
On Nov 9, 2011, at 9:36 AM, Andy O'Meara wrote:
Well, if you have a serial number/license scheme, copy-protection scheme,
crypto, or payment mechanisms that use objC, then realize they're on display
for everyone to see.
Use functions instead of a class to restrict the amount of information
On Nov 10, 2011, at 9:13 AM, Matt Neuburg wrote:
Sometimes it pops up a little way.
Sometimes it pops up a long way.
Sometimes it fails to pop.
Sometimes it pops but when you stop the app it doesn't pop back down.
It's non-deterministic programming!
Xcode animation!
I think they
On Nov 9, 2011, at 12:46 AM, Greg Parker wrote:
Note that Shuttle missions carried ordinary laptops running ordinary
operating systems to do the science work other than flying the spacecraft.
The scientists couldn't afford Shuttle-grade development costs nor
Shuttle-grade development
SOLVED
On Oct 13, 2011, at 4:55 PM, Mike Abdullah wrote:
I'm pretty sure the array controller is observing
NSManagedObjectContextObjectsDidChangeNotification to arrange its objects.
Normally, this doesn't fire until the end of the runloop. But you can force
it to by calling
SOLVED
On Oct 6, 2011, at 8:40 AM, Keary Suska wrote:
AFAIK you will need to manage selection restoration semantics yourself, and
it may not be easy and it may be fragile. Note also that the preserve and
avoid empty selection settings will also have an effect. That being said, the
Consider a NSArrayController in entity mode. When a managed object is inserted
into the managed object context the controller's arrangedObjects property is
not updated immediately.
Calling a controller 'fetch:' immediately after inserting the managed object
into the managed object context does
On Oct 13, 2011, at 3:12 PM, Keary Suska wrote:
How is this happening? Via code? or Via the NSArrayController (add: or
insert:)? In the latter case the docs say, Beginning with Mac OS X v10.4 the
result of this method is deferred until the next iteration of the runloop so
that the error
On Oct 10, 2011, at 9:05 AM, Koen van der Drift wrote:
I'm looking to implement a simple iTunes/Mail like source list in an app, and
have been rummaging through the internets for some decent tutorials and
sample code. I found some, but they are all a bit outdated. Basically, I want
to
It is very common for Applications to update the selection during undo
operations.
By default NSArrayController automatically selects objects as they are
inserted. This works if objects are added using one of the controller's add or
insert methods. If objects are added directly to the
On Oct 5, 2011, at 1:39 PM, Nick wrote:
I have a task to write a simple vector graphics editor, which has a window, a
sheet (which can be bigger than the window), and some objects (triangles,
rectangles) to be placed on this sheet (and then, edited, e.g. rotated,
stretched) by their
On Sep 29, 2011, at 8:42 AM, Nick wrote:
how can I get a keydown (and keyup) events in an NSDocument-oriented
application for a particular document's window?
I'd like to get a control activated/deactivated on the window, depending on
whether the specific key is pressed or released.
Key
On Sep 25, 2011, at 11:13 PM, Jerry Krinock wrote:
I'm debugging a corner case wherein undoing a group containing deletion of a
managed object causes a Core Data could not fulfill a fault exception on
this object. It would help to understand exactly how managed objects are
un-deleted.
On Sep 26, 2011, at 12:34 PM, Jerry Krinock wrote:
Note: It looks like we have a private discussion going on here. I'm not sure
if that was intentional. Anyhow…
Another individual took it private for some reason.
As I said, nothing is being fetched at this point. As I said in my other
Is there a secret to getting symbolic breakpoints to work?
Set symbolic breakpoint 'keyDown:' (without the quotes) and nothing happens.
Set a breakpoint in the gutter and it works fine.
I am using Xcode 4.1 with the LLDB debugger. When I try to switch to the GDB
debugger Xcode crashes. The
On Sep 21, 2011, at 9:43 AM, Jens Alfke wrote:
Is there a secret to getting symbolic breakpoints to work?
Set symbolic breakpoint 'keyDown:' (without the quotes) and nothing happens.
The name has to be like “-[MyView keyDown:]”, otherwise it’s ambiguous which
-keyDown: method you mean —
On Sep 21, 2011, at 12:10 PM, Quincey Morris wrote:
I'm not seeing this behavior in gdb (with Xcode 4.2).
In Xcode 3, if you tried to set a breakpoint on (say) 'keyDown:', Xcode would
pop up a sheet listing all the different matching symbols (all the methods in
the various classes where
On Sep 21, 2011, at 1:49 PM, Quincey Morris wrote:
I made a brand new project in Xcode 4.1 and got the same results as before.
gdb crashes when just using a method name like 'keyDown:' for the symbolic
breakpoint. It would appear that this has been fixed in Xcode 4.2. Also you
have
On Sep 15, 2011, at 8:13 AM, Leonardo wrote:
I need to build using SDK 10.5. I work on Lion and XCode 4.1
If you need the MacOSX10.5.sdk one way to do this is to make a unix hard link
to the sdk included with Xcode 3. To make a hard link use the following
commands from the Terminal
On Sep 15, 2011, at 10:40 AM, Scott Ribe wrote:
Minor nit, that's a symlink, not a hard link. One important difference is
that a symlink can cross volume boundaries...
Correct. Second important difference is symbolic links may refer to directories
which this is.
--Richard
On Sep 13, 2011, at 6:01 AM, Motti Shneor wrote:
Event Programming guide says: ...
It appears that Apple's guidelines are on the safe side, something that will
always work.
Cocoa Design Patterns by Buck and Yacktman says: It is possible to manually
manipulate the Responder Chain to insert
On Sep 6, 2011, at 9:30 AM, Torsten Curdt wrote:
So what should one use e.g. for normal IBOutlets with AppKit?
The answer is in the 2010-12-21 revision of the Memory Management Programming
Guide.
It seems to be missing however from the current 2011-03-24 revision of this
document.
Here is
in the Mac Dev
Center, none of them use either of these much-touted but quite complicated
new features.
Have you looked at TextEdit 1.7 (Lion) in the Examples folder?
--Richard Somers
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Autosaving in Place, NSDocument Autosaving Changes (Section
updated since WWDC 2011), Things to Watch For When Enabling NSDocument
Autosaving in Place (New since WWDC 2011), NSDocument Asynchronous Saving,
NSDocument UI and File Access Serialization, and NSDocument Duplicating.
--Richard Somers
On Aug 14, 2011, at 12:36 AM, Eli Bach wrote:
I wonder what the FinalCutPro and the rest of those apps guys do with all
their custom UI.
I have often wondered about that question myself. If you look inside the Xcode
bundle you will find a single nib file (MainMenu.nib). So it would appear
On Jul 23, 2011, at 4:32 PM, Jerry Krinock wrote:
The last time I looked at Services, it only allowed you to access the
selected (highlighted) text. Is there any way to get and replace the text
of an entire document?
I don't know.
On Jul 23, 2011, at 4:44 PM, Jerry Krinock wrote:
Is
On Jul 23, 2011, at 11:36 AM, Jerry Krinock wrote:
That being said, primarily because of the lack of User Scripts support in
Xcode 4 which I find intolerable, I'm using Xcode 3.2.5 for my daily work,
and of course running Lion.
I converted all my user scripts to automator services. It took
On Jul 21, 2011, at 11:33 AM, vincent habchi wrote:
But anyhow, as somebody pointed out, there are far better ways to get the MAC
address of the en0 port than executing BSD commands in a subprocess.
Apple sample code GetPrimaryMACAddress works well with Lion.
I have a binding to the User Defaults Controller in Interface Builder in Xcode
4. The binding entries look like this.
Controller Key
values
Model Key Path
MyProperty
At the end of the MyProperty entry there is a round dark circle with an
exclamation mark. I
In System Preferences a user may select a specific display resolution.
Some display resolutions will stretch the visible area to fill the display as
needed. But some display resolutions will pillarbox where a black bar is placed
on the left and right of the visible area.
Is it possible to
this unusual behavior exists or what purpose
it has.
--Richard
On Jun 27, 2011, at 11:26 AM, Raleigh Ledet wrote:
Cocoa coordinates are all 0,0 based. If you have a reproducible test case
that says otherwise, please file a radar and attach it.
-raleigh
On Jun 25, 2011, at 7:59 AM, Richard Somers
On Jun 27, 2011, at 1:13 PM, Jens Alfke wrote:
It makes sense to me. Integer coordinates denote the grid lines between
pixels, not the pixel centers. Likewise, the hot-spot of the cursor is in
between pixels, not in the center of a pixel. In the case of the default
arrow cursor, the
The Cocoa Drawing Guide states Cocoa event objects return y coordinate values
that are 1-based instead of 0-based. Thus, a mouse click on the bottom left
corner of a window or view would yield the point (0, 1) in Cocoa and not (0,
0). Only y-coordinates are 1-based.
Why are the y-coordianate
On Jun 24, 2011, at 1:19 AM, Bernard Desgraupes wrote:
I need to detect if the shift key is pressed by the user during the startup
of my app. How would I do that in Cocoa (targetting 10.5 and greater) ?
Try this.
On Jun 12, 2011, at 6:22 PM, Nick wrote:
Finder behaves differently...
Would it be possible to create a similar icon?
Probably not. At least I would hope I would be impossible or at least very
difficult for a developer to do this. From a users perspective I don't think I
would appreciate a
On Apr 9, 2011, at 18:00, Richard Somers wrote:
I have a primary view which displays all objects using a primary controller.
Both 'A' and 'B' objects are included in the controller content. This is
accomplished by using an abstract class in the managed object model that is a
parent of both
suggestions on how to approach this issue?
Thanks in advance for anyone willing to think about this.
--Richard Somers
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was almost on
the right path but got confused with 32-bit/64-bit and NSInteger/
NSUInteger. Thanks for stating this with such clarity.
--Richard Somers
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NSNotFound is formally defined as NSIntegerMax. But the framework
methods returning NSNotFound are typically typed NSUInteger.
Is there a technical reason why NSNotFound is not defined as
NSUIntegerMax?
--Richard Somers
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,
and aids in debugging and refactoring. It works very well.
--Richard Somers
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On Jan 3, 2011, at 9:27 AM, Richard Somers wrote:
I would like to establish bindings in Interface Builder between the
objects created by the custom view and some standard Interface
Builder widgets. The problem is 'awakeFromNib' is called AFTER the
bindings are established so the bindings
MyDocumentWindowController *windowController;
windowController = [[MyDocumentWindowController alloc] init];
[self addWindowController:windowController];
[windowController release];
}
@end
Any suggestions? Thanks.
--Richard Somers
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