CODEWITHSUNDEEP
iosswiftuiviewcontrolleruinavigationcontroller
Patrick
Patrick

Reputation: 43

Swift - Dismiss two controllers wrong order

I have something like this in my Storyboard: NavigationController -> A -> B -> C where A, B and C are ViewControllers. I am staying in C where I have variable representing B controller and doing something like this:

    controllerB?.navigationController?.popViewController(animated: true)
    self.navigationController?.popViewController(animated: true)

Which should dismiss B controller and then C. But when I do this in simulator, I see C controller beeing dismissed first and after it I see B controller for a while before it is dismissed too. I tried delay like this:

DispatchQueue.main.asyncAfter(deadline: .now() + 5.0)

But it is not working either Can you help me? And is it even possible to dissmiss B before C?

Upvotes: 0

Views: 287

Answers (2)

Duncan C
Duncan C

Reputation: 131481

You can't call pop twice in a row like you're trying to do, and using timers is fragile and not recommended. (It's a shame the pop methods don't take a completion handler like the modal dismiss methods do.)

Just use popToViewController(_:animated:). Send the message to self.navigationController, and send A as the view controller to pop to.

If A is the root, just use self.navigationController.popToRootViewController(animated:true)

Upvotes: 0

valosip
valosip

Reputation: 3402

Why not just pop both of them at the same time? You can write an extension for navigation controller and pop back to a passed in viewcontroller regardless of how many vc's are pushed on top.

extension UINavigationController {
    func popBackTo(viewcontroller: UIViewController.Type, animated: Bool) {
        for vc in self.viewControllers {
            if vc.isKind(of: viewcontroller) {
                self.popToViewController(vc, animated: animated)
            }
        }
    }
}

Use case:

self.navigationController?.popBackTo(viewcontroller: ViewControllerA.self, animated: true)

Upvotes: 1

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