CODEWITHSUNDEEP
iosobjective-cuinavigationcontrollerpushviewcontrollerpoptoviewcontroller
user3662854
user3662854

Reputation:

pop To View Controller

I am new to coding objective-C and am trying to use pop to viewController. To do this when a button is tapped i use

[self.navigationController popToViewController:(what goes here) animated:YES];

I know its a UIViewController* that goes there but I am wondering where do I declare this and what code would I use to declare it.

My basic storyboard is I have 4 view controller A,B,C,D and A is the root which pushed to B which pushes to C which pushes to D, my button is on D and I am trying to pop back to B. The object at index method won't work because its doesn't always go A->B->C->D sometimes it goes A->C->B->D so 

[self.navigationController popToViewController: [self.navigationController.viewControllers objectAtIndex:2] animated:YES];

So that doesn't work.

Thanks for the help in advance. Sorry if this question is too basic.

Upvotes: 1

Views: 1712

Answers (2)

Goppinath
Goppinath

Reputation: 10739

Personally I don't find this as a basic question, even I got struck in such a situation. But I found a good solution by using “Mediator Design pattern” and develop my custom UINavigationController as a coordinator by combining the method:

- (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated

and maintaining my own navigation stack.

A coordinator (your custom UINavigationController) has to have the control over your navigation, if your are having unpredictable way of navigation.

Upvotes: 0

MJN
MJN

Reputation: 10818

You need a way to find the desired view controller to pop to.

-(IBAction)popToDesiredViewController:(id)sender
{
    UIViewController *desiredVC = nil;

    // LOOK AT ALL VIEW CONTROLLERS IN NAVIGATION CONTROLLER
    for (UIViewController *oneVC in self.navigationController.viewControllers) {

        // CHECK IF THIS IS THE VIEW CONTROLLER YOU WANT
        // change this to your logic
        BOOL foundDesiredVC = [oneVC isKindOfClass: [SignInVC class]]; 

        if (foundDesiredVC) {
            desiredVC = oneVC;
            break;
        }
    }

    [self.navigationController popToViewController:desiredVC animated:YES];
}

Upvotes: 1

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