title: Local Notification Vibrate until user action
body: <p>I'm incorporating Local Notifications into my app to notify the user when a certain event is happening, like an alarm.</p>
  
  <p>Currently I have the Local Notification working with a sound and it vibrates.</p>
  
  <p>What I'd like is to mimic the Alarm feature in the Clock app, when the user has their phone locked, it pops up a Local Notification style view and keeps vibrating until the user takes an action to stop it.</p>
  
  <p>Is this possible?</p>