iOS swift unwind 2 view controllers and show another one

Question

I have 4 View Controllers (A, B ,C ,D). I can go from A -> B , B -> C. In the View Controller C what I want to do, Remove the B and C then show view controller D. so that If I go back from D it goes to A.

I want to perform this with a transition smoothly. D already has a UIViewControllerTransitioningDelegate methods implemented. So in C I should be able to remove itself and B then show D with the D's Transition like nothing happened. I am not using a NavigationController. What are the approaches I can use to do this ?

Im using Xcode 9 and Swift 4 Thanks

I have already tried unwinding to A and presenting D in unwind method in A, but it says that A is not in the Window Hierarchy yet — Bhanuka Yd, Jan 29 '18 at 15:45
I had the same issue, but was not able to resolve it: https://stackoverflow.com/questions/46054177/how-to-unwind-and-jump-directly-to-the-destination-view-controller — Martin Muldoon, Jan 29 '18 at 15:49
I think in ur case the solution is to use an unwind segue. maybe this would help. https://www.youtube.com/watch?v=akmPXZ4hDuU — Bhanuka Yd, Jan 29 '18 at 15:53

score 0 · Answer 1 · answered Jan 29 '18 at 15:52

0

Assuming all the viewControllers are under the same UINavigationController, why don't you try to use the setViewControllers:animated: method of the navigationController and set the array to be [viewControllerA],

or popToViewController:animated: and pass in the viewController A,

or assuming the VC A is the root VC, use popToRootViewControllerAnimated: to pop to the root.

Hope this helps

answered Jan 29 '18 at 15:52

congsun

144
5

unfortunately I am not using a navigation controller. Is it possible to use a navigation controller without showing navigation bar ontop of the view? – Bhanuka Yd Jan 29 '18 at 15:55
Yes, use the `isNavigationBarHidden` property or `setNavigationBarHidden(_:animated:)` method in the UINavigationController – congsun Jan 29 '18 at 15:59

score 0 · Answer 2 · answered Jan 30 '18 at 07:21

since I couldn't find a way to remove the VC s below D. I went to another approach. When Ds Segue finished (finished transition from C) I cleaned the B and Cs resources. this freed up memory. so That is the workaround I found.

And when I unwind from D to A all the VCs above A is removed automatically

iOS swift unwind 2 view controllers and show another one

2 Answers2