Drag and Drop pin functionality in ios Map

In ios mapkit you can make map pin draggable :
if you want to drag the pin and drop at one location and then check its lattitude longutide then you can apply this code :

first step is to change in

- (MKAnnotationView *) mapView: (MKMapView *) mapView viewForAnnotation: (id) annotation { 

MKPinAnnotationView *pin = (MKPinAnnotationView *) [self.mapView dequeueReusableAnnotationViewWithIdentifier: @"myPin"];

if (pin == nil) { 

pin = [[MKPinAnnotationView alloc] initWithAnnotation: annotation reuseIdentifier: @"myPin"] ; } else { pin.annotation = annotation; 

 } 

pin.animatesDrop = YES; 

pin.draggable = YES; return pin;

}

- (void)mapView:(MKMapView *)mapView

 annotationView:(MKAnnotationView *)annotationView

didChangeDragState:(MKAnnotationViewDragState)newState

   fromOldState:(MKAnnotationViewDragState)oldState

{

    if (newState == MKAnnotationViewDragStateEnding)

    {

        CLLocationCoordinate2D droppedAt = annotationView.annotation.coordinate;

        [annotationView.annotation setCoordinate:droppedAt];

         if(DEBUG_MODE){

        NSLog(@"Pin dropped at %f,%f", droppedAt.latitude, droppedAt.longitude);

         }

    }

}