将 UIView 添加到 UIWindow 的子视图时未检测到画外音

Question

I have used common UIPickerView for my whole app. So, I have used UIWindow

CODE:

@IBAction func show_Picker(_ sender: UIButton) { //ProfileViewController
   let testController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "pick") as! PickerViewController
   UIApplication.shared.keyWindow?.addSubview(testController.view)
}

Voiceover is not detecting this UIWindow subview.

PickerViewController is shown but Voiceover circulating in ProfileViewController itself.

I dont know how to activate Voiceover in PickerViewController .

Can any one help me on this?

Answer 1

Tell VoiceOver a view that makes up a major portion of the screen has appeared with UIAccessibility.post(notification: .screenChanged, argument: newViewOrNil) .