title: Swipe to go back in navigation controller on iOS 7
body: <p>I've been looking through the iOS 7 / UIKIT framework, and although it looks quite different aesthetically it's really the same SDK underneath from what I can see.</p>
  
  <p>My question, is there any extra code that needs to be included to get the draggable behaviour between pushed tableviews/views?</p>
  
  <p>When you push a view onto a UINavigationController you can now drag back to the previous controller from the side rather than pressing the back button.</p>
  
  <p>This behavior can be seen in mail.</p>
  
  <p>How is this achieved, do I need to add any code to add it to my app?</p>