title: Zoom to fit current location and annotation on map
body: <p>I am new to swift (iOS programming in general) and am trying to figure out how to zoom a map out to fit 2 points on the map.</p>
  
  <p>Currently I have </p>
  
  <pre><code>var zoomRect = MKMapRectNull;
  var myLocationPointRect = MKMapRectMake(myLocation.longitude, myLocation.latitude, 0, 0)
  var currentDestinationPointRect = MKMapRectMake(currentDestination.longitude, currentDestination.latitude, 0, 0)
  
  zoomRect = myLocationPointRect;
  zoomRect = MKMapRectUnion(zoomRect, currentDestinationPointRect);
  </code></pre>
  
  <p>Which does nothing.</p>
  
  <p>Do I have to apply <code>zoomRect</code> to the map somehow?</p>