title: How to handle camera interruption states in iOS application using Vuforia for augmented reality same asARKit?
body: <p>In one of my application am using <strong>Vuforia</strong> and <strong>ARkit</strong> for loading 3dimages in camera mode. I have to detect camera interruption states and need to display alert to load camera screen with new images.
  In ARKit we have delegate methods</p>
  
  <pre><code>- (void)sessionWasInterrupted:(ARSession *)session;
  </code></pre>
  
  <p>Is there any delegates in <strong>vuforia SDK</strong> to detect session interruption.</p>
  
  <p>Following are the scenarios to be handled</p>
  
  <p>Scenario 1: 
  User opened ARViewcontroller using vuforia and 3dmodel has been loaded and immediately pressed home screen.
  When user again opens the app I have to dismiss the ARView and neew to show alert that session has bee interupted please start new session.</p>
  
  <p>Solution:
  I tried to handle this scenario using Appdelegate Methods.applicatonDidEnterBackground.</p>
  
  <p>Scenario 2 :
  User opened ARViewcontroller using vuforia and 3dmodel has been loaded and immediately pressed home screen.
  Now user pressed lock/Power button.
  In this mode App still in foreground.
  How to handle this case. Need any suggestions/solutions.</p>