MKMapView 检测左侧或右侧

Question

iOS 11.x Swift 4.0

了解地图视图并使用此代码创建了一个带有左右附件视图的图钉。

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation  {
        return nil
    }
    let reuseId = "pin"
    var pav:MKPinAnnotationView?
    if (pav == nil)
    {
        pav = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        pav?.isDraggable = true
        pav?.canShowCallout = true;
        pav?.rightCalloutAccessoryView = UIButton(type: .infoLight)
        pav?.leftCalloutAccessoryView = UIButton(type: .contactAdd)
    }
    else
    {
        pav?.annotation = annotation;
    }
    return pav;
}

使用此调用来检测何时按下信息灯和/或联系人添加 UIButtons。但是我很难弄清楚如何分辨哪一个被按下了？此呼叫触发？但是如何判断是左派还是右派呢？

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    print("go figure annotationView (view)")
    if (view.rightCalloutAccessoryView != nil) {
        print("right (view.rightCalloutAccessoryView)")
    }
}

显然这是错误的，但是如何知道是点击了左边还是右边？

Answer 1

尝试以下代码：

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    if view.rightCalloutAccessoryView == control {
        //right accessory
    } else {
        // left Accessory
    }
}

Answer 2

可以将控件强制转换为UIButton并检查其类型

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    let btn  = control as! UIButton
    if(btn.buttonType == .infoLight)
    { 
        // right Accessory
    }
    else
    { 
        // left Accessory
    }
}