title: App won't open on push notification, when it was in background (iOS7)
body: <p>I have this issue with iOS7, where I have the following use case for my app:</p>
  
  <ul>
  <li>Launch the app, <strong>put it in background</strong> (press the home button);</li>
  <li>Lock the device </li>
  <li>When a push is received, the lock screen wakes up and displays this:</li>
  </ul>
  
  <p><img src="https://i.stack.imgur.com/dK1S1.png" alt="problematic scenario"></p>
  
  <p>What happens is, if I slide on the notification, everything's cool. My app gets the <code>applicationDidBecomeActive</code> call and I can process the notification.</p>
  
  <p>If I slide on the bottom of the screen, though, nothing happens. I land in the iOS home screen, and no ribbon appears. If I go to my application manually, I won't even get the notification.</p>
  
  <p>The problem is that my app is a VoIP app, so whenever the user discards the push, I would like at least to be able to display a ribbon that encourages the user to answer the call. </p>
  
  <p>I can push a local notification, but for that I need to be aware that the user unlocked the screen without going to my app.</p>
  
  <p>Is this a documented use-case in Apple doc? I couldn't find any relevant pointer.
  Any help appreciated..</p>