title: URL Scheme in an already-open app
body: <p>I'm developing an app which must be related to another app in this way:</p>
  
  <ol>
  <li><p>The first app have a button that, through a URL Scheme, opens the second app and pass two parameters (user and password).</p></li>
  <li><p>The second app verifies those parameters and give access if they're Ok.</p></li>
  </ol>
  
  <p>The system works well if second app is not opened, but if the second app is already open (in background) and is called from the first app with different user and password, doesn't work (the URL Scheme method in AppDelegate is only called once, of course).</p>
  
  <p>Is there any way to allow second app to get new paramenters even is already-open?</p>
  
  <p>Thank you.</p>