Instead of push segue how to replace view controller (or remove from navigation stack)?

Question

I have a small iPhone app, which uses a navigation controller to display 3 views (here fullscreen):

Answer 1

For this problem, I think the answer is just simple as

1. Get the array of view controllers from NavigationController
2. Removing the last ViewController (current view controller)
3. Insert a new one at last

4. Then set the array of ViewControllers back to the navigationController as bellow:

    if let navController = self.navigationController {
       let newVC = DestinationViewController(nibName: "DestinationViewController", bundle: nil)
   
       var stack = navController.viewControllers
       stack.remove(at: stack.count - 1)       // remove current VC
       stack.insert(newVC, at: stack.count) // add the new one
       navController.setViewControllers(stack, animated: true) // boom!
    }
   

works perfectly with Swift 3.

Hope it helps for some new guys.

Cheers.