如何从MKannotation上的第二个按钮开始分割？

// 添加MKAnnotation
let annotation = MKPointAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194)
annotation.title = "San Francisco"
annotation.subtitle = "California"
mapView.addAnnotation(annotation)

// 实现MKMapViewDelegate代理方法
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    guard annotation is MKPointAnnotation else {
        return nil
    }
    
    let identifier = "AnnotationView"
    var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
    
    if annotationView == nil {
        annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
        annotationView?.canShowCallout = true
        
        // 添加第一个按钮
        let button1 = UIButton(type: .detailDisclosure)
        annotationView?.leftCalloutAccessoryView = button1
        
        // 添加第二个按钮
        let button2 = UIButton(type: .infoLight)
        annotationView?.rightCalloutAccessoryView = button2
    } else {
        annotationView?.annotation = annotation
    }
    
    return annotationView
}

// 实现MKMapViewDelegate代理方法
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    guard let annotation = view.annotation as? MKPointAnnotation else {
        return
    }
    
    // 判断点击的按钮是否是第二个按钮
    if control == view.rightCalloutAccessoryView {
        // 执行分割操作
        splitAnnotation(annotation)
    }
}

// 分割操作示例方法
func splitAnnotation(_ annotation: MKPointAnnotation) {
    // 在这里执行分割操作，可以根据需要进行具体的逻辑处理
    // ...
}