How to long press and lift an MKAnnotationView - iphone

Question

I added an MKAnnotationView on an MKMapView, when I long press on it, I hope it can be lifted and move to another location.
How to? Special thanks!

Answer 1

For iOS 4.0 or later
From Apple's Location Awareness Guide > Marking Your Annotation View as Draggable:
To implement minimal support for dragging, you must do the following:
In your annotation objects, implement the setCoordinate: method to allow the map view to update the annotation’s coordinate point.
When creating your annotation view, set its draggable property to YES.
Implementing setCoordinate:
#import <MapKit/MapKit.h>
#interface mapAnnotation : NSObject<MKAnnotation> {
double latitude, longitude;
}
#end
#implementation mapAnnotation
- (void)setCoordinate:(CLLocationCoordinate2D)coordinate{
latitude = coordinate.latitude;
longitude = coordinate.longitude;
}
-(CLLocationCoordinate2D)coordinate {
CLLocationCoordinate2D coordinate = {latitude,longitude};
return coordinate;
}
// ...
#end
Creating the annotation view in the view controller:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString * const identifier = "identifier";
MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (pinView ==nil) {
pinView = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:identifier];
pinView.animatesDrop = YES;
pinView.draggable = YES;
}
return pinView;
}
For any iOS version
Track the user touches and move the pin view accordingly. Look at DDAnnotationView at the bottom of this page: http://digdog.tumblr.com/post/252784277/mapkit-annotation-drag-and-drop-with-callout-info
When the user stops dragging convert the view position to map coordinates and change the annotation coordinates. Throw in some animations for the pin.
Here is a working example : https://github.com/digdog/MapKitDragAndDrop Try adding the classes DDAnnotationView and DDAnnotation to your project, and using the MKMapViewDelegate methods below this line.