title: How to move UITableViewCell back and forth to show it can be swiped?
body: <p>I see in some apps when you come to a screen with a tableview there's a short animation of the cell starting to be swiped, showing the red "swipe to delete" button (UIContextualAction button) and then it returns to normal. It is giving the user the hint: "These rows can be swiped."</p>
  
  <p>Is there a way to achieve this effect? Maybe a way to programmatically start a row swipe then cancel it?</p>