Dragging the map after dragging my MKAnnotationView does not move the MKAnnotationView with it

问题

MKPinAnnotationView does not allow you to use a custom image as 'pin' and enable dragging at the same time, because the image will change back to the default pin as soon as you start dragging. Therefore I use an MKAnnotationView instead of an MKPinAnnotationView.

While using MKAnnotationView instead of MKPinAnnotationView does keep your custom image shown as your 'pin' it doesn't support the drag & drop animation that you get with the default pin.

Anyway, my issue is that after I drag my custom MKAnnotationView to a new point on the map and then move the map itself the MKAnnotationView does not move with the map anymore.

-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
    static NSString *defaultID = @"myLocation";

    if([self.annotation isKindOfClass:[PinAnnotation class]])
    {
        //Try to get an unused annotation, similar to uitableviewcells
        MKAnnotationView *annotationView = [self.mapView dequeueReusableAnnotationViewWithIdentifier:defaultID];

        //If one isn't available, create a new one
        if(!annotationView)
        {
            annotationView = [[MKAnnotationView alloc] initWithAnnotation:self.annotation reuseIdentifier:defaultID];
            annotationView.canShowCallout = YES;
            annotationView.draggable = YES;
            annotationView.enabled = YES;
        }
        UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, 32, 32)];
        imgView.image = self.passableTag.image;
        annotationView.leftCalloutAccessoryView = imgView;
        annotationView.image = [UIImage imageNamed:[Constants tagIconImageNameForTagType:self.passableTag.type]];
        return annotationView;
    }
    return nil;
}

回答1:

I had the same problem and I solved it adding "setDragState" to my MKAnnotationView class.

This is an old solution but it worked to me (iOS8).

回答2:

Just set the annotationView.dragState to MKAnnotationViewDragStateNone after ending the drag:

    - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState {
        if ([view.annotation isKindOfClass:[PinAnnotation class]]) {
            if (newState == MKAnnotationViewDragStateEnding) {
                view.dragState = MKAnnotationViewDragStateNone;
            }
        }
    }

回答3:

Don't reuse MKAnnotationView and it will work.

来源：https://stackoverflow.com/questions/18933632/dragging-the-map-after-dragging-my-mkannotationview-does-not-move-the-mkannotati