尝试弹出一个不存在的视图控制器

Question

我知道很多用户都问过这个问题，但我没有找到合适的解决方案。

我使用的是splitViewController，我隐藏了我的rootViewController，在detailViewController中，我推和弹出了不同的ViewControllers。

当我从ViewController-1导航到ViewController-2时，运行良好，当我从viewController-2返回ViewController-1时，使用[self.navigationController popViewControllerAnimated:NO ];再次运行良好。

现在，当我从ViewController-2导航到ViewController-3并返回到ViewController-2时，它的工作正常。

但现在，当我从ViewController-2返回到ViewController-1时，它会崩溃，并出现以下错误。

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Tried to pop to a view controller that doesn't exist

我启用了僵尸对象。图像

我的应用程序代码如下：1.AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.splitViewController =[[UISplitViewController alloc]init];

    // create master and detailViewController for splitView
    self.rootViewController=[[RootViewController alloc]init];
    self.detailViewController=[[LoginViewController alloc]initWithNibName:@"LoginViewController" bundle:nil] ;

    //create navigation controller for root and detailViewController
    self.rootNav=[[UINavigationController alloc]initWithRootViewController:rootViewController];
    self.detailNav=[[UINavigationController alloc]initWithRootViewController:detailViewController];

    //make hide navigation bar
    self.rootNav.navigationBarHidden = YES;
    self.detailNav.navigationBarHidden = YES;

    //set splitViewController with root and detail viewController
    self.splitViewController.viewControllers=[NSArray arrayWithObjects:self.rootNav,self.detailNav,nil];
    self.splitViewController.delegate=self.detailViewController;

    // Now Add the split view controller's view to the window and display.
    [self.window addSubview:self.splitViewController.view];
    self.window.rootViewController = self.splitViewController;
    [self.window makeKeyAndVisible];


    return YES;
}

2.2.push和pop ViewControllers

   push()
{
 AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
 MyViewController *Vc = [[MyViewController alloc]    initWithNibName:@"MyViewController" bundle:nil];

[appDelegate.detailNav pushViewController:Vc animated:NO];
}

pop()
{
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

    [appDelegate.detailNav popViewControllerAnimated:NO];
}

Answer 1

最后我找到了解决方案，这是非常愚蠢的错误，我的ViewController-3是UINavigationController的代表。

当我试图弹出viewController-2到viewController-1时，我的UINavigationController正在寻找它在viewController中的委托方法- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated -3，该方法已经被弹出。

我把rootViewController交给了UINavigationController的代表，现在它工作得很好。