How to view remove subview?

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To do what you ask you could have the overlay view as an optional, class level property, and try to remove it when the view appears

class VC1: UIViewController {
  var overlayView: UIView?


override func viewDidAppear() {
  super.viewDidAppear()
  overlayView?.removeFromSuperView()
}

Or you could use a protocol / delegate pattern to inform VC1 that VC2 was bring removed and use that method to remove the overlayView. This is a cleaner solution.

However if you’re doing whatever I think you are tyring to do (see my comment) I think there is a better approach – handle it all in the second view controller. Make the main view of second view controller do the masking by setting it’s alpha, then add a container view to the centre of that view and add all your content/functionality into that container view. This way when you dismiss the second the blur layer will go with it.

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