title: Adding Images to UIActionSheet buttons as in UIDocumentInteractionController
body: <p>Is it possible to add an image to the buttons of the <code>UIActionSheet</code> as seen in <code>UIDocumentInteractionController</code>? If so, please let me know how it is done.</p>
  
  <p><img src="https://media.tumblr.com/tumblr_l4mjvbvyCY1qa7he3.jpg" /></p>