Convert MKMapView touch to coordinate

gistfile1.m

UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = 1.0;
[self.mapView addGestureRecognizer:lpgr];

// ---------------------------------

- (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer{
    if (gestureRecognizer.state != UIGestureRecognizerStateBegan)return;
    CGPoint touchPoint = [gestureRecognizer locationInView:self.mapView];   
    CLLocationCoordinate2D touchCoordinate = 
    [self.mapView convertPoint:touchPoint toCoordinateFromView:self.mapView];
    NSLog(@"%f, %f", touchCoordinate.latitude, touchCoordinate.longitude);
}