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iOS

Pop to Particular ViewController

How can I pop to a particular viewController after pressing a button, using swift.

1 Answer

Stone Preston
Stone Preston
42,016 Points

you can pop to a specific index of the view controller stack using the popToViewController method:

// pops to the 3rd controller in the stack
navigationController!.popToViewController(navigationController!.viewControllers[2], animated: false)

When I tried your code I got an error saying that

'UINavigationController?' does not have a member named 'popToViewController'
Stone Preston
Stone Preston
42,016 Points

force unwrap the navigationController optional by placing a ! after it

I have tried that, and I get the error:

Type 'AnyObject' cannot be implicitly downcast to 'UIViewController'; did you mean to use 'as' to force downcast?

Stone Preston
Stone Preston
42,016 Points

did you mean to use 'as' to force downcast?

so do exactly what that says and downcast the item in the array as a view controller:

navigationController!.popToViewController(navigationController!.viewControllers[2] as UIViewController, animated: false)

Thank you.