将注释链接到标识符-Swift、MapKit

因此，我创建了一个注释。注释显示在我的地图上，但我想更改它的视图。但我不知道如何设置它的标识符

如果你在回答这个问题，请使用我的代码，而不是一个例子，因为我真的很困惑

let annotation = MKPointAnnotation()

override func viewDidLoad() {
    super.viewDidLoad()

    let span : MKCoordinateSpan = MKCoordinateSpanMake(0.1, 0.1)
    let location : CLLocationCoordinate2D = CLLocationCoordinate2DMake(-33.809335, 151.258695)
    let region : MKCoordinateRegion = MKCoordinateRegionMake(location, span)
    mapView.setRegion(region, animated: true)

    annotation.coordinate = location
    annotation.title = "Bus Stop"
    annotation.subtitle = "Street Name at Street Name"
    mapView.addAnnotation(annotation)

}

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation)
    -> MKAnnotationView? {

        let identifier = "marker"
        var view: MKMarkerAnnotationView

        if let dequeuedView = mapView.dequeueReusableAnnotationView(
            withIdentifier: identifier)
            as? MKMarkerAnnotationView {
            dequeuedView.annotation = annotation
            view = dequeuedView
        } else {
            view = MKMarkerAnnotationView(annotation: annotation,
                                          reuseIdentifier: identifier)
            view.markerTintColor = UIColor.blue
            view.glyphImage = UIImage(named: "small-business-20")
            view.selectedGlyphImage = UIImage(named: "small-business-40")
            view.canShowCallout = true
            view.calloutOffset = CGPoint(x: -5, y: 5)
            view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
        }
        return view
}

@IBOutlet weak var mapView: MKMapView!

可以使用mapView.viewfor:方法获取mkMarkerNotationView

@IBAction func hoge(_ sender: UIButton) {
    if let ann = self.mapView.view(for: annotation) as? MKMarkerAnnotationView {
        ann.glyphImage = UIImage(named: "Laugh")
    }
}

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例如，您可以将其用作iAction。我编辑了我的答案，但似乎没有回答我的问题