Change Pin Color when user tapped

问题

I would change the color from red to green of an annotation when the user pin tapped addition to changing its title and subtitle.

I am truly lost. I searched how to make a custom annotation pin, ok. I found the implementation of the method when the user touches the pin didSelectAnnotationView and it works when I tap the annotation NSLog(@"Tap") ; , but now I can not change the pin that was touched.

Thank you very much everyone for your contributions.

Ciao

回答1:

To set the pin color, make use of MKPinAnnotationView pinColor property.

MKPinAnnotationView *pin = [[MKPinAnnotationView alloc] init]
pin.pinColor = MKPinAnnotationColorGreen;

For custom annotation image, set the image property, as such.

UIImage *annImage = [UIImage imageNamed:@"AnnotationIcon.png"];
annView.image = annImage;

Do note that the MKPinAnnotationView animateDrop property will not work on custom images. There's a way to duplicate that animation though. See How do I animate MKAnnotationView drop?

Update So bascially, you do this if you wanna change from red to green upon being selected.

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKPinAnnotationView *)view {
    view.pinColor = MKPinAnnotationColorGreen;

}

- (MKAnnotationView *)mapView:(MKMapView *)aMapView
            viewForAnnotation:(id)ann {

    NSString *identifier = @"myPin";
    MKPinAnnotationView *annView = (MKPinAnnotationView *)
    [aMapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (annView == nil) {
        annView= [[[MKPinAnnotationView alloc] initWithAnnotation:ann
                                               reuseIdentifier:identifier]
               autorelease];
    } else {
        annView.annotation = ann;
    }
// you can define the properties here.

return annView;
}

回答2:

In your method set the pinColor property of your MKAnnotationView as follows:

annotationView.pinColor = MKPinAnnotationColorRed; // Green or Purple

回答3:

(re) look this :

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKPinAnnotationView *)view {
    view.pinColor = MKPinAnnotationColorGreen;

}

this is a MKPinAnnotationView (and not MKAnnotationView) in param

来源：https://stackoverflow.com/questions/7108308/change-pin-color-when-user-tapped