MKMapView:自定义视图而不是注释引脚

Question

我想在我的MKMapView而不是小石头上显示图像.有人可以在这里放一些有用的代码,或告诉如何做到这一点？

谢谢!

编辑

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:
(id <MKAnnotation>)annotation {
MKPinAnnotationView *pinView = nil; 
if(annotation != mapView.userLocation) 
{
    static NSString *defaultPinID = @"com.invasivecode.pin";
    pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
    if ( pinView == nil ) pinView = [[MKPinAnnotationView alloc]
                                      initWithAnnotation:annotation reuseIdentifier:defaultPinID];

    pinView.pinColor = MKPinAnnotationColorGreen; 
    pinView.canShowCallout = YES;
    pinView.animatesDrop = YES;
    pinView.image = [UIImage imageNamed:@"pinks.jpg"];    //as suggested by Squatch
} 
else {
    [mapView.userLocation setTitle:@"I am here"];
}
return pinView;
}

我期待我的图像pinks.jpg在地图上,固定位置而不是默认的针视图(摇针形状).但我仍然得到了引脚的默认图像.

Answer 1

如果要将自己的图像用于注释视图,则应创建一个MKAnnotationView而不是一个MKPinAnnotationView.

MKPinAnnotationView是一个子类,MKAnnotationView所以它有一个image属性,但它通常会覆盖它并绘制一个图像(这就是它的用途).

所以将代码更改为:

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation 
{
    MKAnnotationView *pinView = nil; 
    if(annotation != mapView.userLocation) 
    {
        static NSString *defaultPinID = @"com.invasivecode.pin";
        pinView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        if ( pinView == nil ) 
            pinView = [[MKAnnotationView alloc]
                                         initWithAnnotation:annotation reuseIdentifier:defaultPinID];

        //pinView.pinColor = MKPinAnnotationColorGreen; 
        pinView.canShowCallout = YES;
        //pinView.animatesDrop = YES;
        pinView.image = [UIImage imageNamed:@"pinks.jpg"];    //as suggested by Squatch
    } 
    else {
        [mapView.userLocation setTitle:@"I am here"];
    }
    return pinView;
}

请注意,animatesDrop由于该属性仅存在于中,因此也被注释掉了 MKPinAnnotationView.

如果您仍希望删除图像注释,则必须自己动手制作动画.您可以搜索Stack Overflow以获取"animatesdrop mkannotationview",您将找到几个答案.以下是前两个:

• 是否可以在MKAnnotationView而不是MKPinAnnotationView中调用animatesDrop？
• 如何使用MKAnnotationView创建自定义"pin-drop"动画？

Answer 2

这是Swift 3的答案.如果可能,它会使注释视图出列,或者如果不是,则创建一个新注释视图:

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    // Don't want to show a custom image if the annotation is the user's location.
    guard !(annotation is MKUserLocation) else {
        return nil
    }

    // Better to make this class property
    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?
    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
        annotationView = dequeuedAnnotationView
        annotationView?.annotation = annotation
    }
    else {
        annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
        annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
    }

    if let annotationView = annotationView {
        // Configure your annotation view here
        annotationView.canShowCallout = true
        annotationView.image = UIImage(named: "yourImage")
    }

    return annotationView
}

Swift 2.2:

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
    // Don't want to show a custom image if the annotation is the user's location.
    guard !annotation.isKindOfClass(MKUserLocation) else {
        return nil
    }

    // Better to make this class property
    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?
    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier) {
        annotationView = dequeuedAnnotationView
        annotationView?.annotation = annotation
    }
    else {
        let av = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
        av.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)
        annotationView = av
    }

    if let annotationView = annotationView {
        // Configure your annotation view here
        annotationView.canShowCallout = true
        annotationView.image = UIImage(named: "yourImage")
    }

    return annotationView
}