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POView Controller being sent a message even though it has been deallocated
primarykey
Id
1585688
data
AcceptedAnswerId
1648995
AnswerCount
9
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2009-10-18T18:40:42.560
FavoriteCount
11
LastActivityDate
2017-04-19T23:02:35.030
LastEditDate
2017-04-19T23:02:35.030
LastEditorUserId
2370483
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1
Score
4
ViewCount
12670
LastEditorDisplayName
text
Body
I am not sure if something has changed in the iPhone SDK 3.0 but I am getting the strangest error. I have a view controller hierarchy where I switch between view controllers depending upon interface orientation. From what I can tell, the error is caused whenever I rotate the interface a view controller which has been deallocated is being sent a shouldAutorotateToInterfaceOrientation message. This is the backtrace for the error: <pre><code>#0 0x01dc43a7 in ___forwarding___ #1 0x01da06c2 in __forwarding_prep_0___ #2 0x002e6733 in -[UIWindow _shouldAutorotateToInterfaceOrientation:] #3 0x002e6562 in -[UIWindow _updateToInterfaceOrientation:duration:force:] #4 0x002e6515 in -[UIWindow _updateInterfaceOrientationFromDeviceOrientation] #5 0x0004d63a in _nsnote_callback #6 0x01d8f005 in _CFXNotificationPostNotification #7 0x0004aef0 in -[NSNotificationCenter postNotificationName:object:userInfo:] #8 0x0045b454 in -[UIDevice setOrientation:] #9 0x002d6890 in -[UIApplication handleEvent:withNewEvent:] #10 0x002d16d3 in -[UIApplication sendEvent:] #11 0x002d80b5 in _UIApplicationHandleEvent #12 0x024c2ef1 in PurpleEventCallback #13 0x01d9bb80 in CFRunLoopRunSpecific #14 0x01d9ac48 in CFRunLoopRunInMode #15 0x024c17ad in GSEventRunModal #16 0x024c1872 in GSEventRun #17 0x002d9003 in UIApplicationMain #18 0x00002d50 in main at main.m:14 </code></pre> The error that is getting printed to the Debug Console with NSZombieEnabled is: <pre><code>2009-10-18 20:28:34.404 Restaurants[12428:207] *** -[ToolbarController respondsToSelector:]: message sent to deallocated instance 0x3b2b2a0 (gdb) continue Current language: auto; currently objective-c 2009-10-18 20:31:43.496 Restaurants[12428:207] *** NSInvocation: warning: object 0x3b2b2a0 of class '_NSZombie_BeltToolbarController' does not implement methodSignatureForSelector: -- trouble ahead 2009-10-18 20:31:43.496 Restaurants[12428:207] *** NSInvocation: warning: object 0x3b2b2a0 of class '_NSZombie_BeltToolbarController' does not implement doesNotRecognizeSelector: -- abort </code></pre> What I can't understand is why the system is trying to message this controller even though it has been deallocated and is there a way to tell the system that the controller doesn't exist any longer. [UPDATE]: I have put together a sample project replicating the bug: <a href="http://www.bytesizecreations.com/project/ControllerSwitch.zip" rel="nofollow noreferrer">download</a> Load up the app and then change the Simulator's orientation a few times from Landscape to Portrait and it should occur. I have tried the same piece of code on a physical phone and it behaves in exactly the same way, so this is not a simulator related issue. [UPDATE]: I have used up one of my support requests with Apple's technical team to see if they can help me get to the bottom of this. Will post the solution - if they have one - here. Thanks for the help so far.
Tags
<ios><objective-c><iphone><memory-management><uiviewcontroller>
Title
View Controller being sent a message even though it has been deallocated
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PostAcceptedAnswerId
1. PO
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USMachavity
UserOwnerUserId
1. USMichael Gaylord
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PostLinksRelatedPostIdPostId
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1. PO
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