如何在Swift3中更改MapKit中的选定图像？

"选中"是指"轻拍"？如果是这样,请尝试以下代码:

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    view.image = UIImage(named: "marker_gray")
}

func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
    view.image = UIImage(named: "marker_red")
}