Question

I’m wondering if there is any way to return from UIViewController like 3-4 step backward, I’ve a main screen which will navigate to other UIViewController via presentModalViewController, on the next view, it will have a UINavigationBar which will navigate to a 4-5 level deeps. i wanna to put a button that let the user go back to the home directly without returning for all the view he enter.

thx in advance.

Answer 1

Have your root level view controller register as an observer of a notification, such as “POP_TO_ROOT”. When it receives this notification, call a method to dismiss your modal view controller (or whatever is first on the stack).

In your viewcontroller stack, any of the views 4 or 5 levels in can just post a notification “POP_TO_ROOT”.

EDIT: add code

In your main “screen” before you call presentModalViewController, do this:

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(handlePopToRoot) 
                                                 name:@"POP_TO_ROOT"
                                               object:nil];

and add this method:

 - (void) handlePopToRoot {
     [[NotificationCenter defaultCenter] removeObserver:self 
                                                   name:@"POP_TO_ROOT" 
                                                 object:nil];
     [self.navigationController dismissModalViewControllerAnimated: YES]; 
 }

Then, down deep in your viewcontroller hierarchy, when you want to pop all the way out,
you just need to post a notification:

 [[NSNotificationCenter defaultCenter] postNotification:@"POP_TO_ROOT" object:nil];