title: How to, applicationDidBecomeActive in Xamarin iOS?
body: <p>How do I do this in Xamarin iOS?  </p>
  
  <p><a href="https://stackoverflow.com/questions/15864364/viewdidappear-is-not-called-when-opening-app-from-background">ViewDidAppear is not called when opening app from background</a></p>
  
  <p>The link below mentions the OnActivated method for Xamarin in the AppDelegate, but how do I subscribe my ViewController so it knows when the app comes from the background?</p>
  
  <p><a href="https://forums.xamarin.com/discussion/10594/where-is-applicationdidbecomeactive-in-xamarin-ios" rel="nofollow noreferrer">https://forums.xamarin.com/discussion/10594/where-is-applicationdidbecomeactive-in-xamarin-ios</a></p>