title: New iOS 13 Modal Presentation: Presenting Controller Doesn't Move Down
body: <p>I have a weird behavior when presenting UIViewControllers modally in iOS 13. The new presentation style that I've seen all across iOS 13 looks like this:</p>
  
  <p><em>The presenting view controller appears behind the presented view controller. It is also shifted down to mimic a "stack"</em></p>
  
  <p><a href="https://i.stack.imgur.com/ZZMO5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ZZMO5.png" alt="The presenting view controller appears behind the presented view controller. It is also shifted down to mimic a &quot;stack&quot;"></a></p>
  
  <p>Meanwhile, when presenting view controllers through my app, I keep getting this effect:</p>
  
  <p><em>The presenting view controller doesn't move at all when presenting a new view controller</em></p>
  
  <p><a href="https://i.stack.imgur.com/C7VpQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/C7VpQ.png" alt="The presenting view controller doesn&#39;t move at all when presenting a new view controller"></a></p>
  
  <p>I use this code to present this view controller:</p>
  
  <pre><code>let controller = storyboard?.instantiateViewController(withIdentifier: "tutorial") as! TutorialController
  controller.modalPresentationStyle = .pageSheet
  controller.modalTransitionStyle = .coverVertical
  present(controller, animated: true, completion: nil)
  </code></pre>
  
  <p><strong>Here is my question:</strong>
  I'm wondering why this is happening and if there is a way to present view controllers in the normal iOS 13 style (with the presenting view controller moving back).</p>
  
  <p>Thanks in advance!</p>