How to pop view controller to one of the previous view controllers in swift?

Question

I have been trying to pop my view controller to one of previous view controllers in my view stack. Assume that, There are firstVC, secondVC, thirdVC and fourthVC

Answer 1

If you want to pop to a specific view control and dont know the count to go back you can use this:

 let viewControllers: [UIViewController] = self.navigationController!.viewControllers as! [UIViewController];

        for aViewController in viewControllers {
            if(aViewController is ViewControllerYouWantToGoTo){
                 self.navigationController!.popToViewController(aViewController, animated: true);
            }
        }