title: differentiate between Four-finger swipe and home key press event
body: <p>Currently in my iOS app, i'm able to capture the home key pressed event by <strong>UIApplicationDidEnterBackgroundNotification</strong>.    </p>
  
  <p>But the <strong>Four-finger swipe gesture of iPad</strong> also generates the same event as the functionality is same for both the events.. </p>
  
  <p>I need to differentiate between these two events.. </p>
  
  <p>Any help would be appreciated..    thanks.. </p>