title: MapBox iOS SDK: add map event
body: <p>I'm trying to setup an iOS app with the latest MapBox iOS idk (3.2). How much i seek the internet, I can't find an example how to add a map event to the mapview.</p>
  
  <p>For example: i want to add an event when the map becomes idle. Any suggestions?</p>
  
  <p>UPDATE</p>
  
  <p>I think this is the right method to implement:</p>
  
  <pre><code>func mapView(mapView: MGLMapView, regionDidChangeAnimated animated: Bool) {
  
  
  }
  </code></pre>