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POUnrecognized selector sent to instance (self.navigationController.toolbar)
 

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  1. POUnrecognized selector sent to instance (self.navigationController.toolbar)
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    <p>I've been banging my head against the wall for the past 2 days with it - and I need help.</p> <p>In my controller, I have this code:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.navigationController.toolbar.barStyle = UIBarStyleBlack; [self.navigationController setToolbarHidden:NO]; ... // the rest of initialisation goes here } </code></pre> <p>This controller presents details of one item selected from the list. Controller displaying a list of items does <code>pushViewControllerAnimated</code> on this controller to display details of the item selected by the user.</p> <p>This works fine on the first execution, however when the user presses back button - and then selects another (or even the same) item from the list, line <code>[self.navigationController setToolbarHidden:NO]</code> causes <code>SIGABRT</code> with this stack trace:</p> <pre><code>2011-11-04 10:24:21.423 OOKL[32026:10403] -[NSCFNumber view]: unrecognized selector sent to instance 0x69db0e0 2011-11-04 10:24:21.426 OOKL[32026:10403] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFNumber view]: unrecognized selector sent to instance 0x69db0e0' *** Call stack at first throw: ( 0 CoreFoundation 0x019875a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x01adb313 objc_exception_throw + 44 2 CoreFoundation 0x019890bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x018f8966 ___forwarding___ + 966 4 CoreFoundation 0x018f8522 _CF_forwarding_prep_0 + 50 5 UIKit 0x0063223e -[UIToolbar setItems:animated:] + 1554 6 UIKit 0x005f8ccb -[UIViewController(UINavigationControllerContextualToolbar) setToolbarItems:] + 49 7 OOKL 0x0003df87 -[OOExplorerObjectDetailController setUpToolbarForExplore] + 1335 8 OOKL 0x0003eb2b -[OOExplorerObjectDetailController viewDidLoad] + 2043 9 UIKit 0x005fd089 -[UIViewController view] + 179 10 UIKit 0x005fb482 -[UIViewController contentScrollView] + 42 11 UIKit 0x0060bf25 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 48 12 UIKit 0x0060a555 -[UINavigationController _layoutViewController:] + 43 13 UIKit 0x0060b870 -[UINavigationController _startTransition:fromViewController:toViewController:] + 524 14 UIKit 0x0060632a -[UINavigationController _startDeferredTransitionIfNeeded] + 266 15 UIKit 0x0060d562 -[UINavigationController pushViewController:transition:forceImmediate:] + 932 16 UIKit 0x006061c4 -[UINavigationController pushViewController:animated:] + 62 17 OOKL 0x0002ed8b -[OOExploreController showObjectDetailControllerWithObject:] + 571 18 OOKL 0x0002da1c -[OOExploreController parserDidFinish:] + 316 19 OOKL 0x00021c13 -[OOXMLParser parserDidEndDocument:] + 99 20 Foundation 0x00385717 _endDocument + 95 21 libxml2.2.dylib 0x02ad4215 xmlParseChunk + 7380 22 Foundation 0x0038615a -[NSXMLParser parse] + 321 23 OOKL 0x00021893 -[OOXMLParser parseString:] + 339 24 OOKL 0x0002d8d5 -[OOExploreController parseXml:] + 165 25 OOKL 0x0002d81f -[OOExploreController requestDidFinishLoading:] + 79 26 OOKL 0x00011cba -[OOSharedSeverController connectionDidFinishLoading:] + 298 27 Foundation 0x002ef112 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108 28 Foundation 0x002ef06b _NSURLConnectionDidFinishLoading + 133 29 CFNetwork 0x013cd48e _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 220 30 CFNetwork 0x014986e1 _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 293 31 CFNetwork 0x013c3c80 _ZN19URLConnectionClient13processEventsEv + 100 32 CFNetwork 0x013c3acf _ZN17MultiplexerSource7performEv + 251 33 CoreFoundation 0x019688ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 34 CoreFoundation 0x018c688b __CFRunLoopDoSources0 + 571 35 CoreFoundation 0x018c5d86 __CFRunLoopRun + 470 36 CoreFoundation 0x018c5840 CFRunLoopRunSpecific + 208 37 CoreFoundation 0x018c5761 CFRunLoopRunInMode + 97 38 GraphicsServices 0x01e601c4 GSEventRunModal + 217 39 GraphicsServices 0x01e60289 GSEventRun + 115 40 UIKit 0x0055bc93 UIApplicationMain + 1160 41 OOKL 0x00002d09 main + 121 42 OOKL 0x00002c85 start + 53 ) </code></pre> <p>I thought, maybe, I should setup <code>self.toolbarItems</code> first before making the toolbar visible - but then I get this same error when I do</p> <pre><code>self.toolbarItems = [NSArray ...] </code></pre> <p>I'm desperate now - any help is appreciated.</p> <p><strong>Edit</strong>: Now for some reason I'm getting <code>EXC_BAD_ACCESS</code> instead of <code>SIGABRT</code> - in the same place - and no stack trace is produced at all.</p>
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    1. USAleks G
    1. USAleks G
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    1. COHave you notice that your code try to call the method view on an instance of NSCFNumber?
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      1. USLuca Bernardi
    2. COThis is not crashed due to view traversing. I think you need to check imported/exported delegate's feasibility. It might be possible to release mistakenly.
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      1. USSudesh Kumar
    3. COYour EDIT suggests that you are trying to access an object which has been released already and doesn't exists. Try fixing breakpoints.
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      1. USsElanthiraiyan
 

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