Question

在添加子视图控制器时，我遇到了崩溃，这里NavigationViewController是从UIViewController扩展而来的。

当我upgraded到Xcode 9，在早期版本的Xcode上成功运行时，会出现此错误。

我提到Link但没有得到任何满意的答案，请帮我解决这个问题，

提前完成。：）

代码块是：

 _mainSectionsController = [[[MainSectionsController alloc] initWithNibName:nil bundle:nil] autorelease];
[self addChildViewController:_mainSectionsController];   

**Init method of _mainSectionsController** .

 -(id)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
 {
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if (!self) return nil;
  self.edgesForExtendedLayout = UIRectEdgeAll;
  self.viewControllers = @
  [
   [[[NavigationViewController alloc] initWithNibName:nil bundle:nil]
    autorelease]
  ];
  return self;
 } 

**init method of NavigationViewController**

 -(id)initWithNibName:(NSString*)nibNameOrNil bundle: (NSBundle*)nibBundleOrNil
    {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (!self) return nil;
     self.edgesForExtendedLayout = UIRectEdgeAll;

    _navController = [[[UINavigationController alloc] initWithNibName:nil bundle:nil] autorelease];
    _navController.get().delegate = self;
    _navController.get().navigationBarHidden = YES;
    _navController.get().view.clipsToBounds = YES;
    _navController.get().view.backgroundColor = [UIColor clearColor]; 
    return self;
 }

2018-05-22 10：46：23.112290 + 0530 [912：19925] - [NavigationViewController _viewControllerSubtreeDidGainViewController：]：无法识别的选择器发送到实例0x7f91ba83c000   2018-05-22 10：46：24.939903 + 0530 [912：19925] *由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [NavigationViewController _viewControllerSubtreeDidGainViewController：]：无法识别选择器发送到实例0x7f91ba83c000＆＃39;   * 首先抛出调用堆栈：
  （       0 CoreFoundation 0x000000010f03f12b exceptionPreprocess + 171。       1 libobjc.A.dylib 0x000000010e640f41 objc_exception_throw + 48       2 CoreFoundation 0x000000010f0c0024 - [NSObject（NSObject）doesNotRecognizeSelector：] + 132       3 UIKit 0x000000010b2cdf51 - [UIResponder doesNotRecognizeSelector：] + 295       4 CoreFoundation 0x000000010efc1f78 ___ forwarding _ + 1432       5 CoreFoundation 0x000000010efc1958 _CF_forwarding_prep_0 + 120       6 UIKit 0x000000010b246c1d - [UIViewController _addChildViewController：performHierarchyCheck：notifyWillMove：] + 696       7 UIKit 0x000000010b26930e - [UIViewController（UIContainerViewControllerProtectedMethods）addChildViewController：] + 83       8 0x00000001058eeac3 - [MainViewController initWithNibName：bundle：] + 5235       9 0x00000001059876ca - [AppDelegate loadMainViewController] + 122       10 0x0000000105984561 - [AppDelegate应用程序：didFinishLaunchingWithOptions：] + 1137       11 UIKit 0x000000010b091bca - [UIApplication _handleDelegateCallbacksWithOptions：isSuspended：restoreState：] + 299       12 UIKit 0x000000010b093648 - [UIApplication _callInitializationDelegatesForMainScene：transitionContext：] + 4113       13 UIKit 0x000000010b098aeb - [UIApplication _runWithMainScene：transitionContext：completion：] + 1720       14 UIKit 0x000000010b4626f8 111 - [__ UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene：transition：firstActivation：completion：] _ block_invoke + 924       15 UIKit 0x000000010b8384c8 + [_ UICanvas _enqueuePostSettingUpdateTransactionBlock：] + 153       16 UIKit 0x000000010b4622f1 - [__ UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene：transition：firstActivation：completion：] + 249       17 UIKit 0x000000010b462b6b - [__ UICanvasLifecycleMonitor_Compatability activateEventsOnly：withContext：completion：] + 696       18 UIKit 0x000000010bde0a69 __82 - [_ UIApplicationCanvas _transitionLifecycleStateWithTransitionContext：completion：] _ block_invoke + 262       19 UIKit 0x000000010bde0922 - [_ UIApplicationCanvas _transitionLifecycleStateWithTransitionContext：completion：] + 444       20 UIKit 0x000000010babd9c8 __125 - [_ UICanvasLifecycleSettingsDiffAction performActionsForCanvas：withUpdatedScene：settingsDiff：fromSettings：transitionContext：] _ block_invoke + 221       21 UIKit 0x000000010bcbcb06 _performActionsWithDelayForTransitionContext + 100       22 UIKit 0x000000010babd88b - [_ UICanvasLifecycleSettingsDiffAction performActionsForCanvas：withUpdatedScene：settingsDiff：fromSettings：transitionContext：] + 231       23 UIKit 0x000000010b837b25 - [_ UICanvas场景：didUpdateWithDiff：transitionContext：完成：] + 392       24 UIKit 0x000000010b09736a - [UIApplication workspace：didCreateScene：withTransitionContext：completion：] + 523       25 UIKit 0x000000010b672605 - [UIApplicationSceneClientAgent场景：didInitializeWithEvent：完成：] + 369       26 FrontBoardServices 0x0000000116cb8cc0 - [FBSSceneImpl _didCreateWithTransitionContext：completion：] + 338       27 FrontBoardServices 0x0000000116cc17b5 __56- [FBSWorkspace客户端：handleCreateScene：withCompletion：] _ block_invoke_2 + 235       28 libdispatch.dylib 0x000000010f87b33d _dispatch_client_callout + 8       29 libdispatch.dylib 0x000000010f8809f3 _dispatch_block_invoke_direct + 592       30 FrontBoardServices 0x0000000116ced498 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 24       31 FrontBoardServices 0x0000000116ced14e - [FBSSerialQueue _performNext] + 464       32 FrontBoardServices 0x0000000116ced6bd - [FBSSerialQueue _performNextFromRunLoopSource] + 45       33 CoreFoundation 0x000000010efe2101 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17       34 CoreFoundation 0x000000010f081f71 __CFRunLoopDoSource0 + 81       35 CoreFoundation 0x000000010efc6a19 __CFRunLoopDoSources0 + 185       36 CoreFoundation 0x000000010efc5fff __CFRunLoopRun + 1279       37 CoreFoundation 0x000000010efc5889 CFRunLoopRunSpecific + 409       38 GraphicsServices 0x000000010fed99c6 GSEventRunModal + 62       39 UIKit 0x000000010b09a5d6 UIApplicationMain + 159       40 0x000000010590c331 main + 65       41 libdyld.dylib 0x000000010f8f7d81 start + 1   ）   libc ++ abi.dylib：以NSException类型的未捕获异常终止

Answer 1

由于您的pipe代码中有autorelease，我认为您不会在那里使用ARC。我强烈建议将MainSectionsController和MainSectionsController的代码升级到ARC。这可以防止可能导致此类问题的意外过度发布。

此外，我建议尽可能将NavigationViewController分配从构造函数移至viewDidLoad。

应用程序崩溃ios11＆amp; Xcode 9：添加[self addChildViewController：]

1 个答案: