title: Detecting usage of Googles chromecast service within application
body: <p>I am trying to detect the usage of googles chromecast service within a library. Does anybody found a way to accomplish this? Detecting if the iOS device is currently streaming to an AppleTv is possible via:</p>
  
  <pre><code>UIScreen.didConnectNotification, UIScreen.didDisconnectNotification
  </code></pre>
  
  <p>But when ann App is casting to chromecast, both of these notifications are not fired.</p>