title: iPhone: mapView.showUserLocation. VS locationUpdate function
body: <p>I'm developing on an app that is location-based, I have a mapView set to show the user location (mapView.showUserLocation); I also have a locationUpdate function to retrieve lat/long of current position:</p>
  
  <pre><code>(void)locationUpdate:(CLLocation *)location{} 
  </code></pre>
  
  <p>After I call the function stopUpdatingLocation to stop the update location, the mapview (blue ball) continues to update my location...</p>
  
  <p>In other word: is there another locationUpdate function is called automatically from the mapview?</p>