如何更改标记图标?

您可以在mapView中使用以下3种颜色的图钉..

you can use 3 types of color pins in mapView are bellow..

1. MKPinAnnotationColorGreen;
2. MKPinAnnotationColorPurple
3. MKPinAnnotationColorRed

1. MKPinAnnotationColorGreen;
2. MKPinAnnotationColorPurple
3. MKPinAnnotationColorRed

如果您要添加customview或图片，则可以通过编程方式添加

and if you want to add customview or image then you can add with programatically

还可以像下面这样在MKMapView的委托方法中更改引脚..

also you can change pin in delegate method of MKMapView like bellow..

- (MKAnnotationView *)mapView:(MKMapView *)_mapView viewForAnnotation:(id <MKAnnotation>)annotation 
{
 MKPinAnnotationView *pinView  = (MKPinAnnotationView *)[_mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
        if (annotation == _mapView.userLocation) 
        {
//            pinView.pinColor = MKPinAnnotationColorRed;
//            return pinView;
            return nil;
        }
        pinView.pinColor = MKPinAnnotationColorGreen; // you can use MKPinAnnotationColorPurple, MKPinAnnotationColorRed;
        pinView.canShowCallout = YES;
        pinView.animatesDrop = NO;

        return pinView;
}

对于自定义图像或图钉，请使用下面的代码.

and for custom image or pin, use bellow code..

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

    MKAnnotationView *annotationView = (MKAnnotationView *)[_mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];

    if (annotationView == nil)
    {
        annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
    }

    annotationView.image = [UIImage imageNamed:@"yourImageName"];//add any image which you want to show on map instead of red pins
    annotationView.annotation = annotation;

    return annotationView;
}