title: Drag down to dismiss a ViewController
body: <p>I'm building an app with an <code>MKMapView</code> as background, and I would like to have a "slide-up/down"-view, just like in Google Maps or Spotify (<a href="http://i.imgur.com/eoxpGsC.gif" rel="nofollow">example.gif</a>), that can be dismissed by dragging it down.  </p>
  
  <p>The 'slide-up/down-view' will hold quite a lot of info, including a <code>UITableView</code>, so I would probably like it to have its own <code>ViewController</code>, instead of just a <code>UIView</code> alone. <em>What could be a good approach for this?</em></p>
  
  <p>Is it possible "just" to add a childViewController/ContainerView and give it a <code>UIPanGestureRecognizer</code>? All help is appreciated!</p>