CODEWITHSUNDEEP
iosobjective-cipaduiviewcontrolleruinavigationcontroller
Wali Haider
Wali Haider

Reputation: 1272

'Tried to pop to a view controller that doesn't exist

I know this question have asked by many users but I did not find the appropriate solution for my issue.

I'm using splitViewController,I have hidden my rootViewController and in detailViewController I'm pushing and popping the different ViewControllers.

When I'm navigating from ViewController-1 to ViewController-2 its going fine, when I'm returning back to ViewController-1 from viewController-2 using [self.navigationController popViewControllerAnimated:NO ]; again its working fine.

Now when I navigate from ViewController-2 to ViewController-3 and returning back to ViewController-2 its working fine.

But now when I'm returning back from ViewController-2 to ViewController-1 its being crash with following error.

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

I have enabled zombie object. image

code for my app is given below: 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.push and 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];
}

Upvotes: 1

Views: 5484

Answers (1)

Wali Haider
Wali Haider

Reputation: 1272

finally i found the solution, it was very silly mistake,my ViewController-3 was the delegate of UINavigationController.

when i was trying to pop viewController-2 to viewController-1 my UINavigationController was looking for its delegate method - (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated in viewController-3 which was already poped.

i made the rootViewController to the delegate of UINavigationController,now its working fine.

Upvotes: 1

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