自定义注解单击图像后将图像恢复为大头针 [英] Custom annotationView images revert to pins when clicked

问题描述

我正在使用以下代码在地图上显示自定义图像(而不是默认图钉).但是，当我点击一个项目时(出现标注)，图像恢复为默认的红色图钉.即使显示了标注，如何保存我的自定义图片?

I'm displaying custom images on a map (instead of the default pins) using the code below. However, when I tap on an item (and the callout appears), the image reverts to the default red pin. How can I keep my custom image, even when the callout is displayed?

- (MKAnnotationView *) mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{
    MKPinAnnotationView *pinAnnotation = nil;

    if (annotation != mapView.userLocation) 
    {
        static NSString *pinID = @"mapPin";
        pinAnnotation = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:pinID];
        if (pinAnnotation == nil)
            pinAnnotation = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pinID] autorelease];

        // Set the image
        pinAnnotation.image = [UIImage imageNamed:@"TestIcon.png"];

        // Set ability to show callout
        pinAnnotation.canShowCallout = YES;

        // Set up the disclosure button on the right side
        UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        pinAnnotation.rightCalloutAccessoryView = infoButton;

        [pinID release];
    }

    return pinAnnotation;
    [pinAnnotation release];
}

推荐答案

通过将pinAnnotation设置为MKAnnotationView而不是MKPinAnnotationView，我发现了所需的结果.图片不再变成大头针了

I found by making the pinAnnotation a MKAnnotationView rather than a MKPinAnnotationView, I got the desired result. Image doesn't turn into a pin anymore

    static NSString *pinID = @"mapPin";
    pinAnnotation = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:pinID];
    if (pinAnnotation == nil)
        pinAnnotation = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pinID] autorelease];

    // Set the image
    pinAnnotation.image = [UIImage imageNamed:@"TestIcon.png"];

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