Wow. In that particular example it was '[UIScreen mainScreen]
applicationFrame' that was causing the problem. When I changed that to a
CGRectMake, the view was not longer living once I released it. Does
'[UIScreen mainScreen] applicationFrame' cause some sort of caching issue?
Now I'm at a point where this is keeping the view around longer than I think
it should:
NSDictionary *rootDict = [[NSDictionary alloc] initWithContentsOfFile:
filePath];
[rootDict release];
Could someone please explain what this is all about?
Thanks!
On Sun, Apr 26, 2009 at 12:16 PM, Miles <vardpeng...@gmail.com> wrote:
> I've narrowed this down to the smallest case I can.
>
> I have a method that loads a view and immediately releases it:
>
> UIWindow *win = [UIApplication
> sharedApplication].keyWindow;
> TestVC *test = [[TestVC alloc] init];
> [win addSubview:test.view];
> [test.view removeFromSuperview];
> [test release];
>
> And here is the entire TestVC class:
>
> #import "TestVC.h"
>
> @implementation TestVC
>
> - (id)init
> {
> self = [super init];
> if (self){}
> return self;
> }
>
> // Implement loadView to create a view hierarchy programmatically, without
> using a nib.
> - (void)loadView {
>
> UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen
> mainScreen] applicationFrame]];
> contentView.backgroundColor = [UIColor blackColor];
> contentView.autoresizesSubviews = YES;
> [contentView release];
> }
>
> - (void)didReceiveMemoryWarning {
> [super didReceiveMemoryWarning];
> }
>
> - (void)dealloc {
> [super dealloc];
> }
>
> @end
>
>
> When I look in ObjectAlloc, TestVC points to the "UIView *contentView"
> declaration as created and still living. Is this just an objectAlloc bug, or
> is there some other sort of autorelease thing that goes on behind the
> scenes? I don't see any reason why this would still be hanging around.
>
> Ugh.
>
>
>
>
>
>
>
>
> On Fri, Apr 24, 2009 at 7:18 PM, Miles <vardpeng...@gmail.com> wrote:
>
>> Very interesting, I'll give all that a shot and report back. Thanks so
>> much!
>>
>>
>>
>>
>> On Apr 24, 2009, at 7:07 PM, Peter N Lewis <pe...@stairways.com.au>
>> wrote:
>>
>> On 25/04/2009, at 8:28 , Miles wrote:
>>>
>>>> I just mean that I'm adding some labels and images to the view. I have
>>>> quadruple checked that they are all being released, but I must be
>>>> overlooking something.
>>>>
>>>
>>> I doubt its your issue, but I recently had a problem like this that took
>>> me far too long to track down.
>>>
>>> The debugging technique I used was to override retain/release/autorelease
>>> and dealloc and have them just call NSLog and super, then set a breakpoint
>>> on each, add a backtrace "bt" debugging command and set them to
>>> auto-continue.
>>>
>>> Eventually, after much hair pulling I tracked it down to my
>>> removeFromSuperview override neglecting to call super - ouch!
>>>
>>> But one technique for finding this might be to make a trivial subclass of
>>> UIImage that does the above and use it for logo.
>>>
>>> One other possibility would be - does UIImage cache images created with
>>> initWithContentsOfFile? The tehcnique above might tell you if thats what is
>>> happening, because you should see UIImage system code adding it to an
>>> array/dictiuonary/set and not releasing it later.
>>>
>>> Enjoy,
>>> Peter.
>>>
>>> --
>>> Run macros from your iPhone with Keyboard Maestro Control!
>>> or take a break with Derzle for your iPhone
>>>
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>>>
>>>
>>>
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>>
>
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