“只在主线程上运行”的exception只是模拟器
我得到一个“只在主线程运行”exception深处内部（或之后）
[self.navigationController pushViewController:controller animated:YES]; 事情是只发生在模拟器上，而不是在IOS设备中进行debugging。
任何机会我可以解决这个问题？
转储：
2014-03-25 15:18:45.061 Cookila[657:5507] *** Assertion failure in void _UIPerformResizeOfTextViewForTextContainer(NSLayoutManager *, UIView<NSTextContainerView> *, NSTextContainer *, NSUInteger)(), /SourceCache/UIFoundation_Sim/UIFoundation-264.8/UIFoundation/TextSystem/NSLayoutManager_Private.m:1510 2014-03-25 15:18:45.086 Cookila[657:5507] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Only run on the main thread!' *** First throw call stack: ( 0 CoreFoundation 0x027251e4 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x024a48e5 objc_exception_throw + 44 2 CoreFoundation 0x02725048 +[NSException raise:format:arguments:] + 136 3 Foundation 0x01f43b20 -[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 101 4 UIFoundation 0x0947fe25 -[NSLayoutManager(NSPrivate) _resizeTextViewForTextContainer:] + 419 5 UIFoundation 0x0947fb0a -[NSLayoutManager(NSPrivate) _recalculateUsageForTextContainerAtIndex:] + 2083 6 UIFoundation 0x094b4289 _enableTextViewResizing + 234 7 UIFoundation 0x094b7e89 -[NSLayoutManager textStorage:edited:range:changeInLength:invalidatedRange:] + 688 8 UIFoundation 0x094b7f0e -[NSLayoutManager processEditingForTextStorage:edited:range:changeInLength:invalidatedRange:] + 82 9 UIFoundation 0x094e0ab5 -[NSTextStorage _notifyEdited:range:changeInLength:invalidatedRange:] + 153 10 UIFoundation 0x094e05f0 -[NSTextStorage processEditing] + 462 11 UIFoundation 0x094e0199 -[NSTextStorage endEditing] + 80 12 UIFoundation 0x094e0223 -[NSTextStorage coordinateEditing:] + 66 13 UIKit 0x016618cb -[UITextView setAttributedText:] + 254 14 UIKit 0x01660c16 -[UITextView initWithCoder:] + 706 15 UIKit 0x01372d6d UINibDecoderDecodeObjectForValue + 704 16 UIKit 0x01372f6e UINibDecoderDecodeObjectForValue + 1217 17 UIKit 0x01372aa1 -[UINibDecoder decodeObjectForKey:] + 114 18 UIKit 0x00faafa4 -[UIView initWithCoder:] + 842 19 UIKit 0x01372d6d UINibDecoderDecodeObjectForValue + 704 20 UIKit 0x01372f6e UINibDecoderDecodeObjectForValue + 1217 21 UIKit 0x01372aa1 -[UINibDecoder decodeObjectForKey:] + 114 22 UIKit 0x00faafa4 -[UIView initWithCoder:] + 842 23 UIKit 0x00fcdff1 -[UIScrollView initWithCoder:] + 58 24 UIKit 0x01372d6d UINibDecoderDecodeObjectForValue + 704 25 UIKit 0x01372aa1 -[UINibDecoder decodeObjectForKey:] + 114 26 UIKit 0x0120d7a7 -[UIRuntimeConnection initWithCoder:] + 191 27 UIKit 0x01372d6d UINibDecoderDecodeObjectForValue + 704 28 UIKit 0x01372f6e UINibDecoderDecodeObjectForValue + 1217 29 UIKit 0x01372aa1 -[UINibDecoder decodeObjectForKey:] + 114 30 UIKit 0x0120cc21 -[UINib instantiateWithOwner:options:] + 1117 31 UIKit 0x010756f5 -[UIViewController _loadViewFromNibNamed:bundle:] + 280 32 UIKit 0x01075e9d -[UIViewController loadView] + 302 33 UIKit 0x010760d3 -[UIViewController loadViewIfRequired] + 78 34 UIKit 0x010765d9 -[UIViewController view] + 35 35 UIKit 0x01090942 -[UINavigationController _startCustomTransition:] + 778 36 UIKit 0x0109d8f7 -[UINavigationController _startDeferredTransitionIfNeeded:] + 688 37 UIKit 0x0109e4e9 -[UINavigationController __viewWillLayoutSubviews] + 57 38 UIKit 0x011df0d1 -[UILayoutContainerView layoutSubviews] + 213 39 UIKit 0x00fc6964 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355 40 libobjc.A.dylib 0x024b682b -[NSObject performSelector:withObject:] + 70 41 QuartzCore 0x00e2e45a -[CALayer layoutSublayers] + 148 42 QuartzCore 0x00e22244 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380 43 QuartzCore 0x00e220b0 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26 44 QuartzCore 0x00d887fa _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294 45 QuartzCore 0x00d89b85 _ZN2CA11Transaction6commitEv + 393 46 QuartzCore 0x00d89dd6 _ZN2CA11Transaction14release_threadEPv + 226 47 libsystem_pthread.dylib 0x031f581c _pthread_tsd_cleanup + 93 48 libsystem_pthread.dylib 0x031f227e _pthread_exit + 108 49 libsystem_pthread.dylib 0x031f21e8 pthread_exit + 33 50 Foundation 0x01ef1dd2 __NSFinalizeThreadData + 0 51 Foundation 0x01eee97e __NSThread__main__ + 1299 52 libsystem_pthread.dylib 0x031f15fb _pthread_body + 144 53 libsystem_pthread.dylib 0x031f1485 _pthread_struct_init + 0 54 libsystem_pthread.dylib 0x031f6cf2 thread_start + 34 ) libc++abi.dylib: terminating with uncaught exception of type NSException
请从主线程做你的UIcallback。 你绝不能从后台线程更新你的用户界面。
使用Grand Central Dispatch，您的UI是否如此更新：
dispatch_async(dispatch_get_main_queue(), ^{ /* Your UI code */ });
在Swift中相同的代码。
dispatch_async(dispatch_get_main_queue()){ self.navigationController?.setViewControllers([viewController], animated: true) }
在迅速3.0或更高版本
DispatchQueue.main.async(){ //write your code }
原因是使用从不同的线程调用该代码。 你尝试一些dispatch_asyns什么的？
这听起来像你正在从后台线程调用-pushViewController 。 所有UI活动必须在主线程上发生。
解决这个问题的一个简单方法是：
[self.navigationController performSelectorOnMainThread:@selector(pushViewController) withObject:controller]
这将导致-pushViewController在主线程中执行。