A demo of an issue in iOS 11 when dismissing modally presented navigation controllers
This project supplements this stack overflow question.
There are two ways of dismissing a modally presented navigation controller, from the final view controller in the navigation flow:
- Ask the presenting VC to dismiss it:
self.presentingViewController!.dismiss(animated: true) - Call dismiss on the navigation controller:
self.navigationController!.dismiss(animated: true)
The second is allowed since the docs say:
If you call this method on the presented view controller itself, UIKit asks the presenting view controller to handle the dismissal.
They both have problems!
Type 1 produces a visual artifact: a duplicate VS is seen under the dismissed one Type 2 needs to be called twice in order to work! Presumably, the first call is dismissing the search controller?...
Resolved: Adding searchController.isActive = false to viewWillDisappear resolves the issue