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POmessage sent to deallocated instance
 

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    <p>After more than one day reading questions and trying to apply answers, I must ask more help.</p> <p>My ios6 app has a table view on the main screen. After selecting a cell, we access a view controller with a UINavigationBar which has a custom "Back" button calling this method :</p> <pre><code>- (IBAction)goback:(id)sender { [SVProgressHUD dismiss]; if(self.presentingViewController) { NSLog(@" Dismissing View Controller: %@.", self.presentingViewController); [self dismissViewControllerAnimated:NO completion:nil]; } } </code></pre> <p>Usually, this method works well. It only crashes if we press the Back button very quickly, just after the loading of the content (using json and AFNetworking). 5 seconds later, the back button is working fine, but if we click it right after the loading, we get this error :</p> <pre><code>[28103:c07] Dismissing View Controller: &lt;UITabBarController: 0x7578170&gt;. [28103:c07] *** -[CustomViewController respondsToSelector:]: message sent to deallocated instance 0x1257cf70 </code></pre> <p>Obviously, it's a memory problem. That's why I tried to track "Zombies". Profiling my app, I get this report. It shows that there is too much release, but I can't tell which one is the culprit. </p> <p>Does anyone know how to interpret this report ?</p> <p>Is this line normal ?</p> <pre><code>84 0x10291ff0 Release 3 MyApp __destroy_helper_block_ </code></pre> <p>Please tell me if any further information is needed. I thank you for your help.</p> <pre><code># Address Event Type RefCt Responsible Library Responsible Caller 0 0x10291ff0 Malloc 1 UIKit -[UIClassSwapper initWithCoder:] 1 0x10291ff0 Retain 2 UIKit UINibDecoderDecodeObjectForValue 2 0x10291ff0 Retain 3 UIKit -[UIRuntimeConnection initWithCoder:] 3 0x10291ff0 Retain 4 UIKit -[UIRuntimeConnection initWithCoder:] 4 0x10291ff0 Retain 5 UIKit UINibDecoderDecodeObjectForValue 5 0x10291ff0 Retain 6 UIKit UINibDecoderDecodeObjectForValue 6 0x10291ff0 Retain 7 UIKit -[UIStoryboardScene setSceneViewController:] 7 0x10291ff0 Retain 8 UIKit -[UINib instantiateWithOwner:options:] 8 0x10291ff0 Release 7 UIKit -[UINibDecoder finishDecoding] 9 0x10291ff0 Release 6 UIKit -[UIRuntimeConnection dealloc] 10 0x10291ff0 Release 5 UIKit -[UIRuntimeConnection dealloc] 11 0x10291ff0 Release 4 UIKit -[UINibDecoder finishDecoding] 12 0x10291ff0 Release 3 UIKit -[UINibDecoder finishDecoding] 13 0x10291ff0 Release 2 UIKit -[UINibDecoder finishDecoding] 14 0x10291ff0 Retain 3 UIKit -[UIStoryboardSegue initWithIdentifier:source:destination:] 15 0x10291ff0 Retain 4 UIKit -[UIViewController setChildModalViewController:] 16 0x10291ff0 Retain 5 UIKit -[UIApplication _addViewControllerForLockingStatusBarTintColor:] 17 0x10291ff0 Retain 6 UIKit -[UINib instantiateWithOwner:options:] 18 0x10291ff0 Retain 7 UIKit +[UIProxyObject addMappingFromIdentifier:toObject:forCoder:] 19 0x10291ff0 Retain 8 UIKit -[UINib instantiateWithOwner:options:] 20 0x10291ff0 Retain 9 UIKit +[UIProxyObject addMappingFromIdentifier:toObject:forCoder:] 21 0x10291ff0 Retain 10 UIKit -[UIProxyObject initWithCoder:] 22 0x10291ff0 Retain 11 UIKit -[UIRuntimeConnection initWithCoder:] 23 0x10291ff0 Retain 12 UIKit -[UIRuntimeConnection initWithCoder:] 24 0x10291ff0 Retain 13 UIKit -[UIRuntimeConnection initWithCoder:] 25 0x10291ff0 Retain 14 UIKit -[UIRuntimeConnection initWithCoder:] 26 0x10291ff0 Retain 15 UIKit -[UIRuntimeConnection initWithCoder:] 27 0x10291ff0 Retain 16 UIKit -[UIRuntimeConnection initWithCoder:] 28 0x10291ff0 Retain 17 UIKit -[UIRuntimeConnection initWithCoder:] 29 0x10291ff0 Retain 18 UIKit -[UIRuntimeConnection initWithCoder:] 30 0x10291ff0 Retain 19 UIKit -[UIRuntimeConnection initWithCoder:] 31 0x10291ff0 Retain 20 UIKit -[UIRuntimeConnection initWithCoder:] 32 0x10291ff0 Retain 21 UIKit -[UIRuntimeConnection initWithCoder:] 33 0x10291ff0 Retain 22 UIKit -[UIRuntimeConnection initWithCoder:] 34 0x10291ff0 Retain 23 UIKit -[UIRuntimeConnection initWithCoder:] 35 0x10291ff0 Retain 24 UIKit -[UIRuntimeConnection initWithCoder:] 36 0x10291ff0 Retain 25 UIKit -[UIRuntimeConnection initWithCoder:] 37 0x10291ff0 Retain 26 UIKit -[UIRuntimeConnection initWithCoder:] 38 0x10291ff0 Retain 27 UIKit -[UIProxyObject initWithCoder:] 39 0x10291ff0 Retain 28 UIKit -[UIRuntimeConnection initWithCoder:] 40 0x10291ff0 Retain 29 UIKit -[UIRuntimeConnection initWithCoder:] 41 0x10291ff0 Retain 30 UIKit UINibDecoderDecodeObjectForValue 42 0x10291ff0 Retain 31 UIKit UINibDecoderDecodeObjectForValue 43 0x10291ff0 Retain 32 UIKit UINibDecoderDecodeObjectForValue 44 0x10291ff0 Retain 33 UIKit UINibDecoderDecodeObjectForValue 45 0x10291ff0 Release 32 UIKit -[UINib instantiateWithOwner:options:] 46 0x10291ff0 Release 31 UIKit +[UIProxyObject removeMappingsForCoder:] 47 0x10291ff0 Release 30 UIKit +[UIProxyObject removeMappingsForCoder:] 48 0x10291ff0 Release 29 UIKit -[UINibDecoder finishDecoding] 49 0x10291ff0 Release 28 UIKit -[UINibDecoder finishDecoding] 50 0x10291ff0 Release 27 UIKit -[UINibDecoder finishDecoding] 51 0x10291ff0 Release 26 UIKit -[UINibDecoder finishDecoding] 52 0x10291ff0 Release 25 UIKit -[UINibDecoder finishDecoding] 53 0x10291ff0 Release 24 UIKit -[UINibDecoder finishDecoding] 54 0x10291ff0 Release 23 UIKit -[UIRuntimeConnection dealloc] 55 0x10291ff0 Release 22 UIKit -[UIRuntimeConnection dealloc] 56 0x10291ff0 Release 21 UIKit -[UIRuntimeConnection dealloc] 57 0x10291ff0 Release 20 UIKit -[UIRuntimeConnection dealloc] 58 0x10291ff0 Release 19 UIKit -[UIRuntimeConnection dealloc] 59 0x10291ff0 Release 18 UIKit -[UIRuntimeConnection dealloc] 60 0x10291ff0 Release 17 UIKit -[UIRuntimeConnection dealloc] 61 0x10291ff0 Release 16 UIKit -[UIRuntimeConnection dealloc] 62 0x10291ff0 Release 15 UIKit -[UIRuntimeConnection dealloc] 63 0x10291ff0 Release 14 UIKit -[UIRuntimeConnection dealloc] 64 0x10291ff0 Release 13 UIKit -[UIRuntimeConnection dealloc] 65 0x10291ff0 Release 12 UIKit -[UIRuntimeConnection dealloc] 66 0x10291ff0 Release 11 UIKit -[UIRuntimeConnection dealloc] 67 0x10291ff0 Release 10 UIKit -[UIRuntimeConnection dealloc] 68 0x10291ff0 Release 9 UIKit -[UIRuntimeConnection dealloc] 69 0x10291ff0 Release 8 UIKit -[UIRuntimeConnection dealloc] 70 0x10291ff0 Release 7 UIKit -[UIRuntimeConnection dealloc] 71 0x10291ff0 Release 6 UIKit -[UIRuntimeConnection dealloc] 72 0x10291ff0 Release 5 Foundation -[NSAutoreleasePool drain] 73 0x10291ff0 Retain 6 MyApp -[SSPullToRefreshView initWithScrollView:delegate:] 74 0x10291ff0 Release 5 MyApp -[SSPullToRefreshView initWithScrollView:delegate:] 75 0x10291ff0 Retain 6 UIKit -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] 76 0x10291ff0 Retain 7 libsystem_sim_blocks.dylib _Block_object_assign 77 0x10291ff0 Retain 8 libsystem_sim_blocks.dylib _Block_object_assign 78 0x10291ff0 Release 7 Foundation __NSFireDelayedPerform 79 0x10291ff0 Release 6 UIKit -[UIStoryboardSegue dealloc] 80 0x10291ff0 Release 5 Foundation __NSFireDelayedPerform 81 0x10291ff0 Release 4 UIKit -[UIStoryboardScene dealloc] 82 0x10291ff0 Retain 5 UIKit __91-[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:]_block_invoke_0238 83 0x10291ff0 Release 4 UIKit __destroy_helper_block_250 84 0x10291ff0 Release 3 MyApp __destroy_helper_block_ 85 0x10291ff0 Release 2 UIKit -[UIWindowController transitionViewDidComplete:fromView:toView:removeFromView:] 86 0x10291ff0 Retain 3 UIKit -[UIViewController _dismissViewControllerWithTransition:from:completion:] 87 0x10291ff0 Retain 4 UIKit __91-[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:]_block_invoke_0238 88 0x10291ff0 Retain 5 UIKit -[UIViewController _didFinishDismissTransition] 89 0x10291ff0 Retain 6 UIKit -[UIApplication _removeViewControllerForLockingStatusBarTintColor:] 90 0x10291ff0 Release 5 UIKit -[UIApplication _removeViewControllerForLockingStatusBarTintColor:] 91 0x10291ff0 Release 4 UIKit -[UIApplication _removeViewControllerForLockingStatusBarTintColor:] 92 0x10291ff0 Release 3 UIKit -[UIViewController setChildModalViewController:] 93 0x10291ff0 Release 2 UIKit -[UIViewController _didFinishDismissTransition] 94 0x10291ff0 Release 1 UIKit -[UIWindowController transitionViewDidComplete:fromView:toView:removeFromView:] 95 0x10291ff0 Release 0 UIKit -[UIViewController _dismissViewControllerWithTransition:from:completion:] 96 0x10291ff0 Zombie -1 UIKit -[UIScrollView(UIScrollViewInternal) _delegateScrollViewAnimationEnded] </code></pre> <p>-- edit --</p> <p>Here is how I use AFNetworking to retrieve data on each page of my app :</p> <pre><code>[[APIClient sharedClient] getPath:request parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) { [SVProgressHUD dismiss]; [self.pullToRefreshView finishLoading]; ... read data ... } failure:^(AFHTTPRequestOperation *operation, NSError *error) { [SVProgressHUD showErrorWithStatus:error.localizedDescription]; }]; </code></pre> <p>There is no will/didUnload methods, only this one:</p> <pre><code>- (void)viewWillDisappear:(BOOL)animated{ [SVProgressHUD dismiss]; [_pubnub unsubscribeFromChannel: self.pro.channel]; } </code></pre>
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    1. COcan you post some code from your custom view controller like dealloc and viewDidUnload:
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      1. USnkongara
    2. COIs your code executing "respondsToSelector"? If so, can you show that snippet? And, is there any asynchronous execution occurring with AFNetworking? Are you using blocks anywhere?
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    3. CO*Had exactly the same problem.*
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      1. USrohan-patel
 

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