title: iOS 13 UITextField inputView with UIPickerView causing app to not be interact-able
body: <p>I have the following code that worked before for making a <code>UITableView</code> cell tap to show a <code>UIPickerView</code> on screen:</p>
  
  <pre><code>fileprivate var hiddenField: UITextField = UITextField(frame: .zero)
  
  override func viewDidLoad() {
      //...
      hiddenField.delegate = self
      view.addSubview(hiddenField)
  }
  
  func selectYear() {
      let yearPicker = UIPickerView()
      yearPicker.dataSource = self
      yearPicker.delegate = self
  
      hiddenField.inputView = yearPicker
      hiddenField.becomeFirstResponder()
  }
  </code></pre>
  
  <p>However on iOS 13.1 simulator this code now makes it so that I can't tap anywhere in the app (can't scroll the picker view, or tap anywhere else), but the simulator is responsive since I can swipe up on the home indicator to close the app.</p>
  
  <p>Did anything change regarding how this code might run on iOS 13 vs previously?</p>