title: Does performFetchWithCompletionHandler will be called after the device was rebooted or the app killed?
body: <p>Does <code>performFetchWithCompletionHandler</code> (fetch background mode) will be called after the device was rebooted or the app killed ?</p>
  
  <p>I mean does the system will start the app in background and fire <code>performFetchWithCompletionHandler</code> if the app is not actually running ?</p>