title: Swift read userInfo of remote notification
body: <p>I implemented a function to open an AlertView when I receive a remote notification like this:</p>
  
  <pre><code>func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]){
          var notifiAlert = UIAlertView()
          var NotificationMessage : AnyObject? =  userInfo["alert"]
          notifiAlert.title = "TITLE"
          notifiAlert.message = NotificationMessage as? String
          notifiAlert.addButtonWithTitle("OK")
          notifiAlert.show()
  }
  </code></pre>
  
  <p>But NotificationMessage is always nil.</p>
  
  <p>My json payload looks like this:</p>
  
  <pre><code>{"aps":{"alert":"Testmessage","badge":"1"}}
  </code></pre>
  
  <p>I am using Xcode 6, Swift and I am developing for iOS8.
  I searched hours now, but didn't find any useful information.
  The Notifications works perfectly.. and if I click it, the alertview opens.
  My problem is, that I am not able to get the data out of userInfo.</p>