MKMapView animating positions on a route

Below code animates a marker on the map from source to destination. 

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    CLLocationCoordinate2D centerCoord = { 37.774929, -122.419416 };

    [self.mapView setCenterCoordinate:centerCoord zoomLevel:3.0 animated:NO];

    

    CLLocationCoordinate2D sanFrancisco = { 37.774929, -122.419416 };

    CLLocationCoordinate2D newYork = { 40.714353, -74.005973 };

    CLLocationCoordinate2D pointsArc[] = { sanFrancisco, newYork };

    

    thePlane = [[MKPointAnnotation alloc] init];

    thePlane.coordinate = sanFrancisco;

    thePlane.title = @"Plane";

    [self.mapView addAnnotation:thePlane];

    geodesic = [MKGeodesicPolyline polylineWithCoordinates:&pointsArc[0]

                                                     count:2];

    planePositionIndex = 0;

    [self performSelector:@selector(updatePlanePosition) withObject:nil afterDelay:2.0];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

-(void)updatePlanePosition

{

    planePositionIndex = planePositionIndex + 50;

    if (planePositionIndex >= geodesic.pointCount)

    {

        return;

    }

    MKMapPoint nextMapPoint = geodesic.points[planePositionIndex];

    //convert MKMapPoint to CLLocationCoordinate2D...

    CLLocationCoordinate2D nextCoord = MKCoordinateForMapPoint(nextMapPoint);

    //update the plane's coordinate...

    thePlane.coordinate = nextCoord;

    //schedule the next update...

    [self performSelector:@selector(updatePlanePosition) withObject:nil afterDelay:0.5];

}

references:

http://stackoverflow.com/questions/22504822/animate-a-visual-element-along-an-arc-in-mapkit/22506771#22506771