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 viewcontrollers in my view stack. The current view controller is fourth one, and there is a tableview in fourthVC. If user delete all the rows in tableview, I should direct the user to secondVC. I had an idea that I would create another navigationcontroller and present it with presentViewController command. However, this is not a solution for my problem. Because I thougt that a navigation problem appears for this case. How can I find best solution for this case ?

Thank you for your answers, Best regards

I dont use storyboard, I use xib files. Is there a solution for it ? — serhanaksut, Oct 13 '14 at 15:32

score 35 · Accepted Answer · answered Oct 13 '14 at 15:32

35

Instead of doing a generic popViewControllerAnimated: call, use popToViewController:animated:. You could detect if the user has deleted all of the rows in which case, do something like this (otherwise just pop one view controller):

let viewControllers: [UIViewController] = self.navigationController!.viewControllers as [UIViewController];
self.navigationController!.popToViewController(viewControllers[viewControllers.count - 2], animated: true);

answered Oct 13 '14 at 15:32

Aaron Wojnowski

6,352
5
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I created an UIViewController extension who is more safer, I also created a second extension to return to a specific viewcontroller. https://stackoverflow.com/a/44626461/2370587 – Maximelc Jun 19 '17 at 09:12

score 19 · Answer 2 · answered Jul 15 '15 at 16:30

19

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);
            }
        }

answered Jul 15 '15 at 16:30

BluGeni

3,378
8
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64

Worked great for me! – Jason Brady Jun 07 '16 at 19:25
I'm getting this crash result : fatal error: unexpectedly found nil while unwrapping an Optional value at first line of code – Jayprakash Dubey Sep 30 '16 at 10:19
@bluGeni can you please give me code for going to root view controller of main navigation controller, as i have multiple of them. – Mamta Jan 13 '17 at 12:54

score 12 · Answer 3 · answered Apr 26 '17 at 09:11

12

After lots of effort I have created swift extension of back to a particular view controller in Swift 3.0.

extension UINavigationController {

    func backToViewController(viewController: Swift.AnyClass) {

            for element in viewControllers as Array {
                if element.isKind(of: viewController) {
                    self.popToViewController(element, animated: true)
                break
            }
        }
    }
}

Method calling:

   self.navigationController?.backToViewController(viewController: BarCodeScannerVC.self)

answered Apr 26 '17 at 09:11

Arvind Kumar

2,371
1
18
25

Nice extension! But I don't that cast to `Array` Is necessary anymore bro. – Paulo Mattos May 04 '17 at 22:56
Thanks it helps alot. – Ashwinkumar Mangrulkar Apr 02 '18 at 10:15
Works like a charm even with Swift 5 – ibyte Feb 09 '21 at 14:36

score 0 · Answer 4 · answered Oct 30 '17 at 11:32

Here you can do this by the find the controller from the UINavigationController stack and with the help of for loop and check the condition of your desire controller and if the condition gets fulfilled it will pop to the destionation controller.

let viewControllersStack: [UIViewController] = self.navigationController!.viewControllers
      for firstViewcontroller in viewControllersStack
      {
           if firstViewcontroller is desireViewController
           {
                self.navigationController!.popToViewController(firstViewcontroller, animated: true)
           }
      }

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

4 Answers4

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