How can I pop specific View Controller in Swift

Ios Problem Overview

I used the Objective-C code below to pop a specific ViewController.

for (UIViewController *controller in self.navigationController.viewControllers) {
    if ([controller isKindOfClass:[AnOldViewController class]]) { 
        //Do not forget to import AnOldViewController.h
        [self.navigationController popToViewController:controller
                                              animated:YES];
        break;
    }
}

How can I do that in Swift?

Ios Solutions

Solution 1 - Ios

Try following code:

for controller in self.navigationController!.viewControllers as Array {
    if controller.isKind(of: ViewController.self) {
        self.navigationController!.popToViewController(controller, animated: true)
        break
    }
}

Solution 2 - Ios

For Swift 3+

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

Solution 3 - Ios

Swift 5

To pop to the latest instance of a specific class, for example SomeViewController:

navigationController?.popToViewController(ofClass: SomeViewController.self)

But you need to add ths UINavigationController extension:

extension UINavigationController {
  func popToViewController(ofClass: AnyClass, animated: Bool = true) {
    if let vc = viewControllers.last(where: { $0.isKind(of: ofClass) }) {
      popToViewController(vc, animated: animated)
    }
  }
}

Solution 4 - Ios

Swift 4.0

for controller in self.navigationController!.viewControllers as Array {
        if controller.isKind(of: DashboardVC.self) {
            _ =  self.navigationController!.popToViewController(controller, animated: true)
            break
        }
    }

This is working Perfect.

Solution 5 - Ios

I prefer a generic way to do it.

I have this extension for the UINavigationController :

extension UINavigationController {
   
   func backToViewController(vc: Any) {
      // iterate to find the type of vc
      for element in viewControllers as Array {
         if "\(element.dynamicType).Type" == "\(vc.dynamicType)" {
            self.popToViewController(element, animated: true)
            break
         }
      }
   }
   
}

Let's say I have a FOHomeVC class (who is a UIViewController) instantiated in the navigation stack.

So I would do this in my code:

self.navigationController?.backToViewController(FOHomeVC.self)

Solution 6 - Ios

I have added an extension to UINavigationController which helps you to find if that controller exist in navigation stack. If yes then it will be popped to that controller or else you pass new controller to push with pushController param.

extension UINavigationController {
    
    func containsViewController(ofKind kind: AnyClass) -> Bool {
        return self.viewControllers.contains(where: { $0.isKind(of: kind) })
    }
    
    func popPushToVC(ofKind kind: AnyClass, pushController: UIViewController) {
        if containsViewController(ofKind: kind) {
            for controller in self.viewControllers {
                if controller.isKind(of: kind) {
                    popToViewController(controller, animated: true)
                    break
                }
            }
        } else {
            pushViewController(pushController, animated: true)
        }
    }
}

Solution 7 - Ios

Swift 4 / Swift 5

 for controller in self.navigationController!.viewControllers as Array {
            if controller.isKind(of: HomeViewController.self) {
                self.navigationController!.popToViewController(controller, animated: true)
                break
            }
        }

Solution 8 - Ios

I prefer a "real generic" and more functional approach.

So I came up with following UINavigationController extension functions. You can also use the first function, for anything else, where you just need to access a specific VC in the navigation stack.

Extensions

extension UINavigationController {
    func getViewController<T: UIViewController>(of type: T.Type) -> UIViewController? {
        return self.viewControllers.first(where: { $0 is T })
    }

    func popToViewController<T: UIViewController>(of type: T.Type, animated: Bool) {
        guard let viewController = self.getViewController(of: type) else { return }
        self.popToViewController(viewController, animated: animated)
    }
}

Usage

self.navigationController?.popToViewController(of: YourViewController.self, animated: true)

This should work at least in Swift 4 and 5.

Solution 9 - Ios

Find your view controller from navigation stack and pop to that view controller if it exists

for vc in self.navigationController!.viewControllers {
    if let myViewCont = vc as? VCName 
    {
        self.navigationController?.popToViewController(myViewCont, animated: true)
    }
}

Solution 10 - Ios

swift5

let controllers : Array = self.navigationController!.viewControllers
self.navigationController!.popToViewController(controllers[1], animated: true)

Solution 11 - Ios

In latest swift

   @IBAction func popToConversationsVC(_ sender: UIButton) {
        if (self.navigationController != nil) {
            for vc in  self.navigationController!.viewControllers {
                if vc is ConversationsVC {
                     self.navigationController?.popToViewController(vc, animated: false)
                }
            }
            }
    }

Solution 12 - Ios

Swift 5 Answer of @PabloR is Here :

extension UINavigationController {

   func backToViewController(vc: Any) {
      // iterate to find the type of vc
      for element in viewControllers as Array {
        if "\(type(of: element)).Type" == "\(type(of: vc))" {
            self.popToViewController(element, animated: true)
            break
         }
      }
   }

}

Usage :

self.navigationController?.backToViewController(vc: TaskListViewController.self)

Solution 13 - Ios

For Swift 4.0 and above Using Filter

guard let VC = self.navigationController?.viewControllers.filter({$0.isKind(of: YourViewController.self)}).first else {return}
self.navigationController?.popToViewController(VC, animated: true)

Solution 14 - Ios

Please use this below code for Swift 3.0:

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

for aViewController:UIViewController in viewControllers {
            if aViewController.isKind(of: YourViewController.self) {
                _ = self.navigationController?.popToViewController(aViewController, animated: true)
            }
        }

Solution 15 - Ios

I needed to use this, because in some cases app crashes:

if let navVC = self.navigationController {
                    let views = navVC.viewControllers as Array
                    for controller in views {
                        if controller.isKind(of: YourVC.self) {
                            navVC.popToViewController(controller, animated: true)
                            return
                        }
                    }
                }

Solution 16 - Ios

This solution worked for me :)

extension UINavigationController {
  func backToViewController(_ viewController: AnyClass, animated: Bool) {

    guard let viewController = self.viewControllers.first(where: {$0.isKind(of: viewController)}) else { return }
    self.popToViewController(viewController, animated: animated)
  }
}

Solution 17 - Ios

extension UINavigationController {
    func popBack(to vc: AnyClass, animated: Bool = true) {
        guard let elementFound = (viewControllers.filter { $0.isKind(of: vc) }).first else {
            fatalError("cannot pop back to \(vc) as it is not in the view hierarchy")
        }
        self.popToViewController(elementFound, animated: animated)
    }
}

Solution 18 - Ios

simple and best solution without force unwrapped is

if let vc = navigationController.viewControllers.filter({$0 is YourViewController}).first as? YourViewController {
            self.navigationController.popToViewController(vc, animated: true)
            }

Solution 19 - Ios

I adapt from all answer above. It look like Yakup Ad answer, because it's very short way.

I force type by using generic for argument, that make sure you must pass only UIViewController to this func.
I search viewController that already in stack by using .first this make me got only one VC then stop the loop.
I also return passing VC back if you need to customize somethings.

Let's enjoy.

extension UINavigationController {

    func popToViewController<T: UIViewController>(_ viewController: T.Type, animated: Bool) -> T? {
        guard let viewController = self.viewControllers.first(where: {$0 is T}) else { return nil }
        self.popToViewController(viewController, animated: animated)
        
        return viewController as? T
    }
    
}

Usage

let poppedVC = self.navigationController?.popToViewController(HomeViewController.self, animated: true)

Content Type	Original Author	Original Content on Stackoverflow
Question	Mahesh Cheliya	View Question on Stackoverflow
Solution 1 - Ios	Mohit	View Answer on Stackoverflow
Solution 2 - Ios	Museer Ahamad Ansari	View Answer on Stackoverflow
Solution 3 - Ios	budiDino	View Answer on Stackoverflow
Solution 4 - Ios	Ashu	View Answer on Stackoverflow
Solution 5 - Ios	PabloR	View Answer on Stackoverflow
Solution 6 - Ios	Parth Adroja	View Answer on Stackoverflow
Solution 7 - Ios	Pranit	View Answer on Stackoverflow
Solution 8 - Ios	d4Rk	View Answer on Stackoverflow
Solution 9 - Ios	Chinju James	View Answer on Stackoverflow
Solution 10 - Ios	Mohsen Sedaghat Fard	View Answer on Stackoverflow
Solution 11 - Ios	Vijayvir Sing Pantlia	View Answer on Stackoverflow
Solution 12 - Ios	Govani Dhruv Vijaykumar	View Answer on Stackoverflow
Solution 13 - Ios	Mehsam Saeed	View Answer on Stackoverflow
Solution 14 - Ios	urvashi bhagat	View Answer on Stackoverflow
Solution 15 - Ios	clopex	View Answer on Stackoverflow
Solution 16 - Ios	Yakup Ad	View Answer on Stackoverflow
Solution 17 - Ios	user2866811	View Answer on Stackoverflow
Solution 18 - Ios	Ali Subhani	View Answer on Stackoverflow
Solution 19 - Ios	LordGift	View Answer on Stackoverflow