iOS7 - UITabBarController seletedindex crash

我正在研究基於TabBar的應用程序。在某些時候，我做的：iOS7 - UITabBarController seletedindex crash

if([[[appDelegate.tabBarController viewControllers] objectAtIndex:1] isKindOfClass:[UINavigationController class]]) { 
    UINavigationController *navController = [[appDelegate.tabBarController viewControllers] objectAtIndex:1]; 
    [navController popToRootViewControllerAnimated:NO]; 
} 
appDelegate.tabBarController.selectedIndex = 1; // CRASH HERE

在iOS6它工作正常，但是當我建立與XCode5/iOS7的應用程序，然後在這裏隨機應用程序崩潰。請幫助我們。

謝謝！

崩潰日誌：

* thread #1: tid = 0x4b606, 0x0557f811 CoreFoundation`___forwarding___ + 769, queue = 'com.apple.main-thread, stop reason = EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0) 
frame #0: 0x0557f811 CoreFoundation`___forwarding___ + 769 
frame #1: 0x0557f4ee CoreFoundation`_CF_forwarding_prep_0 + 14 
frame #2: 0x01128d6a UIKit`-[UISearchBar _didMoveFromWindow:toWindow:] + 168 
frame #3: 0x00eca847 UIKit`-[UIView(Internal) _didMoveFromWindow:toWindow:] + 761 
frame #4: 0x00eca847 UIKit`-[UIView(Internal) _didMoveFromWindow:toWindow:] + 761 
frame #5: 0x00eca847 UIKit`-[UIView(Internal) _didMoveFromWindow:toWindow:] + 761 
frame #6: 0x00ec2070 UIKit`__45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 162 
frame #7: 0x00ec1ef8 UIKit`-[UIView(Hierarchy) _postMovedFromSuperview:] + 260 
frame #8: 0x00ecd031 UIKit`-[UIView(Internal) _addSubview:positioned:relativeTo:] + 1847 
frame #9: 0x00ec0521 UIKit`-[UIView(Hierarchy) addSubview:] + 56 
frame #10: 0x00f5b1f8 UIKit`-[UITransitionView transition:fromView:toView:removeFromView:] + 1205 
frame #11: 0x00f5ad3b UIKit`-[UITransitionView transition:fromView:toView:] + 62 
frame #12: 0x00f5aadb UIKit`-[UITransitionView transition:toView:] + 123 
frame #13: 0x00fafe45 UIKit`-[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 1438 
frame #14: 0x00faf262 UIKit`-[UITabBarController transitionFromViewController:toViewController:] + 63 
frame #15: 0x00fab64b UIKit`-[UITabBarController _setSelectedViewController:] + 279 
frame #16: 0x00fab470 UIKit`-[UITabBarController setSelectedIndex:] + 261 
frame #17: 0x00014e6d TestApp`-[HomeViewController btn_TopRatedClicked:](self=0x0d813830, _cmd=0x0023559b, sender=0x0dbceb80) + 1533 at HomeViewController.m:707 
frame #18: 0x02311874 libobjc.A.dylib`-[NSObject performSelector:withObject:withObject:] + 77 
frame #19: 0x00e66c8c UIKit`-[UIApplication sendAction:to:from:forEvent:] + 108 
frame #20: 0x00e66c18 UIKit`-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61 
frame #21: 0x00f5e6d9 UIKit`-[UIControl sendAction:to:forEvent:] + 66 
frame #22: 0x00f5ea9c UIKit`-[UIControl _sendActionsForEvents:withEvent:] + 577 
frame #23: 0x00f5dd4b UIKit`-[UIControl touchesEnded:withEvent:] + 641 
frame #24: 0x00ea40cd UIKit`-[UIWindow _sendTouchesForEvent:] + 852 
frame #25: 0x00ea4d34 UIKit`-[UIWindow sendEvent:] + 1232 
frame #26: 0x00e78a36 UIKit`-[UIApplication sendEvent:] + 242 
frame #27: 0x00e62d9f UIKit`_UIApplicationHandleEventQueue + 11421 
frame #28: 0x055188af CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 
frame #29: 0x0551823b CoreFoundation`__CFRunLoopDoSources0 + 235 
frame #30: 0x0553530e CoreFoundation`__CFRunLoopRun + 910 
frame #31: 0x05534b33 CoreFoundation`CFRunLoopRunSpecific + 467 
frame #32: 0x0553494b CoreFoundation`CFRunLoopRunInMode + 123 
frame #33: 0x02b739d7 GraphicsServices`GSEventRunModal + 192 
frame #34: 0x02b737fe GraphicsServices`GSEventRun + 104 
frame #35: 0x00e6594b UIKit`UIApplicationMain + 1225 
frame #36: 0x0000213d TestApp`main(argc=1, argv=0xbfffed08) + 141 at main.m:16

在HomeViewController.m：707我發現下面的語句：

appDelegate.tabBarController.selectedIndex = 1; // CRASH HERE

來源

2013-10-03 Sandeep-Systematix

我也嘗試malloc_info命令，但沒有運氣！ –

您可以包含堆棧跟蹤或至少是崩潰消息嗎？ –

我已經包含了崩潰日誌。 –

在iOS7，導航控制器堆棧崩潰，所以我做了以下內容：

NSMutableArray *allControllersArray = [[appDelegate.tabBarController viewControllers] mutableCopy]; 
SearchViewController *viewController2 = [[SearchViewController alloc] initWithNibName:@"SearchViewController" bundle:nil]; 
UINavigationController *search=[[UINavigationController alloc] initWithRootViewController:viewController2]; 
[allControllersArray replaceObjectAtIndex:1 withObject:search]; 

appDelegate.tabBarController.viewControllers = allControllersArray;

而且之後：

appDelegate.tabBarController.selectedIndex = 1;

來源

2013-11-22 11:16:37

你已經解決了這個問題。原因是視圖控制器被釋放，但searchbar.delegate未設置nil。因此，您可以在視圖控制器的dealloc中設置searchBar.delegate = nil。

來源

2014-03-27 08:09:30 zhoudeyong

應該接受答案。它絕對描述了原因以及如何解決它！ – Sauvage

iOS7 - UITabBarController seletedindex crash

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