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I have an app which uses mouse to interact in side the app , i want to lock pointer to prevent it from overlap with system gesture on iphone se 2020 like if pointer reach up right corner it grabs notification window i used method like here in WWDC2020 https://developer.apple.com/videos/play/wwdc2020/10617?time=461 with view controller and called func which should change pointer state from viewDidLoad func import UIKit class ViewController: UIViewController {       var pointerLocked :Bool = true   override var prefersPointerLocked: Bool   {     return pointerLocked   }   override func viewDidLoad()   {     super.viewDidLoad()     changePointerState(newState: false)   }      func changePointerState(newState:Bool)   {     pointerLocked=true     self.setNeedsUpdateOfPrefersPointerLocked()       } }