希望有人可以提供帮助,我正在尝试在mapView上实现丢弃一个Pin。但我希望能够拖动引脚并将其删除,并使此注释与用户位置的注释分开。虽然以下代码有效,但它会为用户的触摸创建重复的引脚,并且无法拖动引脚:
- (void)dropPinFromPress:(UIGestureRecognizer *)recognizer {
// Add Pin from User's Touch
if (recognizer.state != UIGestureRecognizerStateBegan) {
return;
}
// convert touched position to map coordinate
CGPoint userTouch = [recognizer locationInView:self.mapView];
CLLocationCoordinate2D mapPoint = [self.mapView convertPoint:userTouch toCoordinateFromView:self.mapView];
// Add Pin from user's touch
Annotation *pin = [[Annotation alloc]initWithLocation:mapPoint];
[self.mapView addAnnotation:pin];
}
答案 0 :(得分:0)
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation
{
MKAnnotationView *a = [ [ MKAnnotationView alloc ] initWithAnnotation:annotation reuseIdentifier:@"currentloc"];
// a.title = @"test";
if ( a == nil )
a = [ [ MKAnnotationView alloc ] initWithAnnotation:annotation reuseIdentifier: @"currentloc" ];
NSLog(@"%f",a.annotation.coordinate.latitude);
NSLog(@"%f",a.annotation.coordinate.longitude);
CLLocation* currentLocationMap = [[[CLLocation alloc] initWithLatitude:a.annotation.coordinate.latitude longitude:a.annotation.coordinate.longitude] autorelease];
[self coordinatesToDMS:currentLocationMap];
MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:a reuseIdentifier:@"currentloc"];
if(a.annotation.coordinate.longitude == mapView.userLocation.coordinate.longitude || a.annotation.coordinate.latitude == mapView.userLocation.coordinate.latitude )
{
if ([annotation isKindOfClass:MKUserLocation.class])
{
//user location view is being requested,
//return nil so it uses the default which is a blue dot...
return nil;
}
//a.image = [UIImage imageNamed:@"userlocation.png"];
//a.pinColor=[UIColor redColor];
}
else
{
// annView.image =[UIImage imageNamed:@"map-pin.png"];
//PinFirst=FALSE;
//annView.pinColor = [UIColor redColor];
// annView.annotation=annotation;
}
annView.animatesDrop = YES;
annView.draggable = YES;
annView.canShowCallout = YES;
return annView;
}
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
NSLog(@"map Drag");
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view didChangeDragState:(MKAnnotationViewDragState)newState
fromOldState:(MKAnnotationViewDragState)oldState;
{
NSLog(@"pin Drag");
if (newState == MKAnnotationViewDragStateEnding)
{
CLLocationCoordinate2D droppedAt = view.annotation.coordinate;
NSLog(@"Pin dropped at %f,%f", droppedAt.latitude, droppedAt.longitude);
CLLocation* draglocation = [[[CLLocation alloc] initWithLatitude:droppedAt.latitude longitude:droppedAt.longitude] autorelease];
}
}