title: MVVMcross: Restore From Suspension or Pause
body: <p>I would like to launch a particular viewmodel...similar to ShowViewModel()... when the application comes back from suspension. </p>
  
  <p>For an Android's activity, it seems like the current activity can be pause and I would need to have the call in the OnResume of each activity in the application.</p>
  
  <p>For iOS, particularly iOS 7, it seems that the application will be resumed after a suspension and the call must would be in the appdelegate's WillEnterForeground().  In this scenario, I am assuming that the last ViewModel/View is unknown.    </p>
  
  <p>How is the best way to handle this?</p>
  
  <p>Thanks.</p>