В вашем контроллере представления вы должны реализовать методы из протокола MKMapViewDelegate и LongPressGestureAware (который я создал) для удаления булавки на карте, когда пользователь нажимает и удерживает на экране.
В вашей аннотации должна быть реализована MKAnnotationи MKReverseGeocoderDelegate протоколы.
Я вставляю часть своего кода, который может вам помочь:
SimpleMapAnnotationViewController.h:
@interface SimpleMapAnnotationViewController : TTViewController<LongPressGestureAware, MKMapViewDelegate> {
SimpleMapAnnotation *_dropPin;
MKPinAnnotationView *_pinView;
}
SimpleMapAnnotationViewController.m:
#pragma mark -
#pragma mark LongPressGestureAware
-(void) initLongPressGestureRecognizer {
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGesture:)];
[self.map addGestureRecognizer:longPressGesture];
[longPressGesture release];
}
-(void)handleLongPressGesture:(UIGestureRecognizer*)sender {
if([sender isMemberOfClass:[UILongPressGestureRecognizer class]] && (sender.state == UIGestureRecognizerStateEnded || sender.state == UIGestureRecognizerStateBegan)) {
[self.map removeGestureRecognizer:sender]; //avoid multiple pins to appear when holding on the screen
}
CGPoint point = [sender locationInView:self.map];
CLLocationCoordinate2D theCoordinate = [self.map convertPoint:point toCoordinateFromView:self.map];
self.dropPin = [[[SimpleMapAnnotation alloc] initWithCoordinate:theCoordinate] autorelease];
[self.map addAnnotation:self.dropPin];
[self performSelector:@selector(selectInitialAnnotation) withObject:nil afterDelay:0.5];
}
-(void)selectInitialAnnotation {
[self.map selectAnnotation:[self.map.annotations objectAtIndex:0] animated:YES];
}
#pragma mark -
#pragma mark MKMapViewDelegate
- (MKAnnotationView *) mapView: (MKMapView *) mapView viewForAnnotation: (id<MKAnnotation>) annotation {
if (annotation == self.map.userLocation){
return nil; //default to blue dot
}
MKPinAnnotationView *pin = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier: @"annotation_ID"];
if (pin == nil) {
pin = [[[MKPinAnnotationView alloc] initWithAnnotation: annotation reuseIdentifier: @"annotation_ID"] autorelease];
} else {
pin.annotation = annotation;
}
pin.canShowCallout = YES;
pin.draggable = YES;
pin.animatesDrop = YES;
pin.pinColor = MKPinAnnotationColorGreen;
self.pinView = pin;
self.dropPin.pinView = self.pinView;
return pin;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState {
//NSArray *annotations = self.map.annotations;
if (oldState == MKAnnotationViewDragStateDragging) {
SimpleMapAnnotation *annotation = (SimpleMapAnnotation *)annotationView.annotation;
[annotation updateSubtitle];
}
if(newState == MKAnnotationViewDragStateEnding) {
NSLog(@"drag finish");
}
}
SimpleMapAnnotation.h
@interface SimpleMapAnnotation : NSObject <MKAnnotation, MKReverseGeocoderDelegate> {
CLLocationCoordinate2D _coordinate;
NSString *_title;
NSString *_subtitle;
MKPinAnnotationView *_pinView;
}
SimpleMapAnnotation.m
- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate {
self.coordinate = coordinate;
MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:self.coordinate];
geoCoder.delegate = self;
[geoCoder start];
self.subtitle = [NSString stringWithFormat:@"%f %f", self.coordinate.latitude, self.coordinate.longitude];
return self;
}
#pragma mark -
#pragma mark MKReverseGeocoderDelegate
// this delegate is called when the reverseGeocoder finds a placemark
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
{
MKPlacemark * myPlacemark = placemark;
NSString *address = [myPlacemark.addressDictionary objectForKey:(NSString*) kABPersonAddressStreetKey];
self.title = address;
}
// this delegate method is called if an error occurs in locating your current location
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"locationManager:%@ didFailWithError:%@", manager, error);
}
// this delegate is called when the reversegeocoder fails to find a placemark
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
//invalid place
}