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PO
 

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    <p>First, please don't use an initial capital letter for an object - reserve those for classes (it makes reading code much harder for most of us). </p> <p>Generally it's bad practice to release objects in callbacks. Use a dispatch block to the main queue to release the object or a performSelectorOnMainthread:, and see if that helps.</p> <p>EDIT: didn't mean to imply you needed a complete block. Reading the docs again shows no indication of retain change if the animation does not complete. Since you have a release in your code, you are not using ARC.</p> <p>Non-ARC: so imgStart is alloc/inited, no autorelease, so its retain count is 1. You add it to the subview, its now two. You (or the system) removes it from the subview, its now 1. The final release makes it 0 (I'm ignoring the retain/release by the block itself). I just cannot see how the system could release it, as its not really anywhere it can be seen (its not an ivar, so viewDidUnload cannot release it). Right now this is a mystery.</p> <p>Suppose you converted to ARC: imgStart is released at the start of the animation, two things retain it, the subview array and the block. When its removed from the subview array (by whoever), retain count goes down by 1, and when the block completes it will release it as well, causing the retain count to go to 0 so it will be released.</p> <p>If nothing above rings a bell or helps, you can at least try and find when/where that object is getting dealloced. Create a UIImageView subclass in your .m file:</p> <pre><code>@implementation MyIV : UIIMageView @end @interface MyIV - (void)dealloc { [super dealloc]; NSLog(@"MYIV DEALLOC!!!!"); } @end </code></pre> <p>Put a breakpoint on the log message, and you can see exactly where its getting dealloc'd. I've found this so helpful in the past I created an ARC class to do this even for class clusters on github, called <a href="https://github.com/dhoerl/ObjectTracker" rel="nofollow">Tracker</a>.</p>
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    1. POAnimations crash App after going into background
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    1. USDavid H
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    1. COThanks - The variable names were changed to make more sense than what they are within the App but point taken, will be lower case next time. I've changed this to a block (see question) but as expected, it still the same outcome. When the App goes into the background, it still sends a 'finished' bool of NO and the objects no longer exist / can be released. So as above, is this NO enough to assume it has been cleaned up?
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