自定义图像作为注释引脚，具有两种不同颜色的图像

Question

我正在尝试为我的引脚注释添加自定义图像，并更改某些注释的自定义图像的颜色。颜色已更改。但是，图像不会显示。而是显示默认引脚。

这是我的代码：

class MyPointAnnotation : MKPointAnnotation {
    var pinTintColor: UIColor?
}
class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate{
    @IBOutlet weak var map: MKMapView!
    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "myAnnotation") as? MKPinAnnotationView
        if annotationView == nil {
            annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myAnnotation")
            annotationView?.canShowCallout = true
        } else {
            annotationView?.annotation = annotation
        }
        if annotation is MKUserLocation {
            return nil
        }
        if let annotation = annotation as? MyPointAnnotation {
            annotationView?.pinTintColor = annotation.pinTintColor
            annotationView?.image = UIImage(named: "BLog.png")
        }
        return annotationView
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        self.map.delegate = self  
        let annotation1 = MyPointAnnotation()
        annotation1.coordinate = CLLocationCoordinate2DMake([LatArray], [LonArray])
        annotation1.title = NameArray
        annotation1.pinTintColor = .red
        let annotation2 = MyPointAnnotation()
        annotation2.coordinate = CLLocationCoordinate2DMake([LatArray2], [LonArray2])
        annotation2.title = NameArray2
        annotation2.pinTintColor = .green
    } 
}

图像"BLog.png"位于主捆绑包中。我已将 MKMapView 指定为代表。

但形象仍然不会改变。

Answer 1

您需要

使用 MKAnnotationView 而不是 MKPinAnnotationView 来为引脚注释添加自定义图像。

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation {
        return nil
    }
    if // Image pin // {
        var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "image")
        if annotationView == nil {
            annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "image")
            annotationView?.canShowCallout = true
            annotationView?.image = UIImage(named: "BLog.png")
            let rightButton: AnyObject! = UIButton(type: UIButtonType.detailDisclosure)
            annotationView?.rightCalloutAccessoryView = rightButton as? UIView
        }
        else {
            annotationView?.annotation = annotation
        }
        return annotationView
    } else {
        var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "myAnnotation") as? MKPinAnnotationView
        if annotationView == nil {
            annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myAnnotation")
            annotationView?.canShowCallout = true
        } else {
            annotationView?.annotation = annotation
        }
        if let annotation = annotation as? MyPointAnnotation {
            annotationView?.pinTintColor = annotation.pinTintColor
        }
        return annotationView
    }
}