Swift-更改注释图像不起作用 [英] Swift - Changing Annotation Image Not Working

问题描述

我已经按照其他堆栈文章和教程将注释图像更改为自定义图像，但是它似乎不起作用.没有错误或运行时错误出现，只是注释图像没有改变.

I have followed other stack posts and tutorials in changing my annotations image to a custom one, but it does not seem to work. No errors or runtime errors appear, it's just that the annotation image does not change.

顺便说一句，我在行annotationView!.image = UIImage(named: "RaceCarMan2png.png")上设置了一个断点，它表明该行正在被调用，但是什么也没发生.我将衷心感谢您的帮助.谢谢.

Just by the way I set a break point on the line annotationView!.image = UIImage(named: "RaceCarMan2png.png") and it shows that the line is being called, but yet nothing happens. I would really appreciate your help. Thanks.

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation {
        return nil
    }

    let identifier = "MyCustomAnnotation"

    var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)
    if annotationView == nil {
        annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
        annotationView?.canShowCallout = true

        annotationView!.image = UIImage(named: "RaceCarMan2png.png")

    } else {
        annotationView!.annotation = annotation
    }


    configureDetailView(annotationView!)

    return annotationView
}

func configureDetailView(annotationView: MKAnnotationView) {
        annotationView.detailCalloutAccessoryView = UIImageView(image: UIImage(named: "url.jpg"))
}

推荐答案

问题是您正在使用MKPinAnnotationView.如果使用MKAnnotationView，将看到您的图像.

The issue is that you're using MKPinAnnotationView. If you use MKAnnotationView, you will see your image.

过去(例如，iOS 8)，设置MKPinAnnotationView的image似乎可以正常工作，但是在iOS 9和更高版本中，无论使用哪种引脚(对于称为类的类来说，这都不是完全不合理的行为) MKPinAnnotationView;哈哈).

In the past (e.g. iOS 8), setting the image of MKPinAnnotationView seemed to work fine, but in iOS 9 and later, it uses a pin, regardless (which is not entirely unreasonable behavior for a class called MKPinAnnotationView; lol).

使用MKAnnotationView可以避免此问题.

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