title: Partial page curl by pan gesture like in UIPageViewController
body: <p>I would like to <strong>partly</strong> display a view controller exactly like </p>
  
  <blockquote>
    <p>UIModalTransitionStylePartialCurl</p>
  </blockquote>
  
  <p>,
  but instead of the curling animation i want to curl the view by a pan gesture</p>
  
  <p>My goal is to get the same affect like when using UIPageViewController to switch between ViewControllers by dragging\curling the page according to the user touches (not a swipe gesture).</p>
  
  <p>Any help will be appreciated.</p>