自定义MKAnnotation管脚在单击时执行特定操作--自定义管脚不显示

import MapKit

class CustomAnnotation: MKPointAnnotation {
    var customData: Any?
    
    func performSpecificOperation() {
        // 执行特定操作的逻辑
    }
}

class CustomAnnotationView: MKAnnotationView {
    override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
        super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
        
        // 设置自定义的标注视图样式
    }
    
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        
        if selected {
            if let customAnnotation = annotation as? CustomAnnotation {
                customAnnotation.performSpecificOperation()
            }
        }
    }
}

class MapViewController: UIViewController, MKMapViewDelegate {
    @IBOutlet weak var mapView: MKMapView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        mapView.delegate = self
        
        // 添加自定义的标注
        let customAnnotation = CustomAnnotation()
        customAnnotation.coordinate = CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194)
        customAnnotation.title = "Custom Annotation"
        mapView.addAnnotation(customAnnotation)
    }
    
    func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
        if let customAnnotation = view.annotation as? CustomAnnotation {
            customAnnotation.performSpecificOperation()
        }
    }
}