ios – Swift – 更改注释图像不起作用

我已经按照其他堆栈帖子和教程将我的注释图像更改为自定义图像,但它似乎不起作用.不会出现错误或运行时错误,只是注释图像不会改变.

顺便说一下,我在一行annotationView！.image = UIImage(名字：“RaceCarMan2png.png”)上设置一个断点,它显示该行被调用,但没有任何反应.我将衷心感谢您的帮助.谢谢.

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"))
}

问题是你正在使用MKPinAnnotationView.如果您使用MKAnnotationView,您将看到您的图像：

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var mapView: MKMapView!

    private func addAnnotation(coordinate coordinate: CLLocationCoordinate2D, title: String, subtitle: String) {
        let annotation = MKPointAnnotation()
        annotation.coordinate = coordinate
        annotation.title = title
        annotation.subtitle = subtitle
        mapView.addAnnotation(annotation)
    }

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

        let identifier = "CustomAnnotation"

        var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)

        if annotationView == nil {
            annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
            annotationView!.canShowCallout = true
            annotationView!.image = UIImage(named: "star.png")!   // go ahead and use forced unwrapping and you'll be notified if it can't be found; alternatively, use `guard` statement to accomplish the same thing and show a custom error message
        } else {
            annotationView!.annotation = annotation
        }

        return annotationView
    }

    ...
}

产量：

在过去(例如iOS 8),设置MKPinAnnotationView的图像似乎工作正常,但在iOS 9.x中,似乎无论如何都使用pin.对于名为MKPinAnnotationView的类而言,这并非完全不合理的行为,并且使用MKAnnotationView可以避免此问题.