title: In iOS 8, how to implement long-swipe-to-delete gesture a la Mail.app
body: <p>In Apple's 2014 WWDC keynote, they showed a gesture in the Mail app that lets you long-swipe to delete a message immediately. This is different than swiping then tapping the delete button. Below is a screen shot of it in action. Does anyone know if this is available as a public API yet? I've looked through the WWDC session videos and the documentation to no avail.</p>
  
  <p>I would prefer to use native APIs rather than custom classes if possible; this is why I'm asking.</p>
  
  <p>Thanks in advance.</p>
  
  <p><img src="https://i.stack.imgur.com/1Q2yB.png" alt="enter image description here"></p>