通过url设置MKPinAnnotationView的图像-SetMKPinAnnotationView'simageviaurl

Is it possible to programmatically set the image for an MKPinAnnotationView based on URL? So far I have this:

是否可以基于URL以编程方式为MKPinAnnotationView设置图像?到目前为止我有这个:

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id)annotation {
static NSString *identifier = @"infl8Node";

if ([annotation isKindOfClass:[infl8Node class]]) {
    MKPinAnnotationView *annotatiOnView= (MKPinAnnotationView *) [_mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (annotatiOnView== nil) {
        annotatiOnView= [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
    } else {
        annotationView.annotation = annotation;
    }

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;
    annotationView.image = [UIImage imageNamed:@"invisible.png"];
    annotationView.animatesDrop = YES;

    //Add image from url
    NSURL *url = [NSURL URLWithString: @"http://cdn2.raywenderlich.com/downloads/arrest.png"];
    UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:image];
    [annotationView addSubview:imgView];

    return annotationView;
}
return nil;
}

However it results in something like this:

但是它会产生这样的结果:

Has anyone done this or have a good idea as to how to accomplish this?

有没有人这样做或有一个好主意如何实现这一目标?

1 个解决方案

 annotatiOnView= [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
        replace use MKAnnotationView here