title: WatchKit and UIAlertView / UIAlertController popup
body: <p>In my WatchKit app, when the user first launches it, I would like to present to them a helpful message alert that tells them how the app works, e.g. what the buttons do, etc.</p>
  
  <p>Is there something similar to UIAlertView / UIAlertController that I can call in a WatchKit app? I couldn't find an answer on this topic which may very well mean that it's not possible.</p>