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copied!<p>Below is an example that creates a circle and drops a pin where the user touches and holds their finger for 1 second. It uses a UILongPressGestureRecognizer which is added to the mapView wherever the map is initialized (eg. viewDidLoad).</p> <p>Make sure the mapView's delegate is set also.</p> <pre><code>// In viewDidLoad or where map is initialized... UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)]; lpgr.minimumPressDuration = 1.0; //user must hold for 1 second [mapView addGestureRecognizer:lpgr]; [lpgr release]; ... - (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer { if (gestureRecognizer.state != UIGestureRecognizerStateBegan) return; CGPoint touchPoint = [gestureRecognizer locationInView:mapView]; CLLocationCoordinate2D touchMapCoordinate = [mapView convertPoint:touchPoint toCoordinateFromView:mapView]; //add pin where user touched down... MKPointAnnotation *pa = [[MKPointAnnotation alloc] init]; pa.coordinate = touchMapCoordinate; pa.title = @"Hello"; [mapView addAnnotation:pa]; [pa release]; //add circle with 5km radius where user touched down... MKCircle *circle = [MKCircle circleWithCenterCoordinate:touchMapCoordinate radius:5000]; [mapView addOverlay:circle]; } -(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id)overlay { MKCircleView* circleView = [[[MKCircleView alloc] initWithOverlay:overlay] autorelease]; circleView.fillColor = [UIColor redColor]; return circleView; } - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { static NSString *AnnotationIdentifier = @"Annotation"; MKPinAnnotationView* pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier]; if (!pinView) { pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease]; pinView.pinColor = MKPinAnnotationColorGreen; pinView.animatesDrop = YES; } else { pinView.annotation = annotation; } return pinView; } </code></pre>

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