要实现这一点，您需要为右侧附件视图添加目标。您可以通过将按钮设置为rightCalloutAccessoryView来实现这一点，如代码片段所示。

class MapViewController: UIViewController, MKMapViewDelegate {

    func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
        if annotation is Annotation {
            let annotationView = AnnotationView(annotation: annotation, reuseIdentifier: "reuseIdentifier")
            let rightButton = UIButton(type: .DetailDisclosure)
            rightButton.addTarget(self, action: #selector(didClickDetailDisclosure(_:)), forControlEvents: .TouchUpInside)
            annotationView.rightCalloutAccessoryView = rightButton
        }
        return nil
    }

    func didClickDetailDisclosure(button: UIButton) {
        // TODO: Perform action when was clicked on right callout accessory view.
    }
}

// Helper classes.
class Annotation: NSObject, MKAnnotation {
    var coordinate: CLLocationCoordinate2D
    var title: String?
    var subtitle: String?

    init(coordinate: CLLocationCoordinate2D, title: String, subtitle: String) {
        self.coordinate = coordinate
        self.title = title
        self.subtitle = subtitle
    }
}

class AnnotationView: MKAnnotationView {

}

1.使用UIView和UITapGestureRecognizer而不是UIControl

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
  let annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "reuseIdentifier")
  let gestureView = UIView(frame:CGRect(x: 0,y: 0,width: 20,height: 20))
  let gestureRecognizer = UITapGestureRecognizer()
  gestureRecognizer.addTarget(self, action:  #selector(MapViewController.didClickGestureRecognizer(_:)))

  gestureView.addGestureRecognizer(gestureRecognizer)
  gestureView.backgroundColor = UIColor.redColor()
  annotationView.rightCalloutAccessoryView = gestureView
  return annotationView
}    

func didClickGestureRecognizer(sender:UITapGestureRecognizer) -> Void {
  print("didClickGestureRecognizer")
}

当您单击rightCalloutAccessoryView时，只有didClickGestureRecognizer会被调用，但是您的calloutAccessoryControlTapped不能被任何人调用。
2.如果您的UI控件为rightCalloutAccessoryView，则可以直接点击MKAnnotationView。否则无法点击MKAnnotationView。
当您点击rightCalloutAccessoryView或直接点击MKAnnotationView时，将调用您的选择器和calloutAccessoryControlTapped
3.如果您有一个UIControl leftCalloutAccessoryView，当您点击它时，您的选择器和calloutAccessoryControlTapped都将被调用。
4.从iOS 9开始，您可以在MKAnnotationView中添加detailCalloutAccessoryView。当您点击它时，只有您的选择器会被调用。
5.您还可以创建自己的自定义MKAnnotationView，并更改其行为。