ios - 当用户使用 MapKit、Swift 点击 map 时如何执行操作

Question

我有自定义 View ，当用户点击注释时会出现这些 View ，但我不知道当用户点击 map 上的其他位置时如何使这些 View 消失。在适用于 iOS 的 Google Map SDK 中，它将是 didTapAtCooperative，然后我将设置 view.hidden = true。

我认为可以使用touchBegan来完成，尽管我以前没有使用过这个功能？虽然我更喜欢 Google 的 MapKit 版本 didTapAtCooperative。

编辑

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var mapView: MKMapView!
    @IBOutlet weak var myCustomView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        myCustomView.hidden = true
        //MyAnnatationClass is my class where I store MKAnnatations with additional details
        let ann = MyAnnatationClass(coordinate: CLLocationCoordinate2D(latitude: 54.694084, longitude: 25.288782), title: "DEMO2", name: "Some Name")
        mapView.addAnnotation(ann)
   }

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

        let identifier = "id"

        if annotation.isKindOfClass(MyAnnatationClass.self) {

            var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)

            if annotationView == nil {

                annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
                annotationView?.image = UIImage(named: "pin.png")
                annotationView!.canShowCallout = true
            } else {

                annotationView!.annotation = annotation
            }

            return annotationView
        }

        return nil
    }

    func mapView(mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView) {
        //Set view details
        let myAnn = view.annotation as! MyAnnatationClass
        someViewLabel.text = myAnn.name
        myCustomView.hidden = false

        let annotationTap = UITapGestureRecognizer(target: self, action: "tapRecognized:")
        annotationTap.numberOfTapsRequired = 1
        view.addGestureRecognizer(annotationTap)

        let selectedAnnotations = mapView.selectedAnnotations

        for annotationView in selectedAnnotations{
            mapView.deselectAnnotation(annotationView, animated: true)
        }
    }

    func mapView(mapView: MKMapView, didDeselectAnnotationView view: MKAnnotationView) {
        view.hidden = true 
    }

    func tapRecognized(gesture:UITapGestureRecognizer){

        let selectedAnnotations = mapView.selectedAnnotations

        for annotationView in selectedAnnotations{
            mapView.deselectAnnotation(annotationView, animated: true)
        }
    }
}

目前，当我触摸注释时，myCustomView 会出现，注释会消失。如果在 didDeselectAnnotationView 中，我将 view 更改为 myCustomView，则自定义 View 永远不会出现。

Answer 1

我认为 Igor 的回答 https://stackoverflow.com/a/11455213/4205432对你有好处，我只是把它翻译成 swift。你有一个委托(delegate)方法，你可以用它来知道哪个注释 View 被取消选择并在那里做你的事情。 正如 Igor 的回答中提到的，您可以添加一个 bool 标志来标识是否为“isShow”。

   func mapView(mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView) {

        let annotationTap = UITapGestureRecognizer(target: self, action: "tapRecognized")
        annotationTap.numberOfTapsRequired = 1
        view.addGestureRecognizer(annotationTap)

        let selectedAnnotations = mapView.selectedAnnotations

        for annotationView in selectedAnnotations{
            mapView.deselectAnnotation(annotationView, animated: true)
        }
    }

    func tapRecognized(gesture:UITapGestureRecognizer){

        let selectedAnnotations = mapView.selectedAnnotations

        for annotationView in selectedAnnotations{
            mapView.deselectAnnotation(annotationView, animated: true)
        }
    }

    func mapView(mapView: MKMapView, didDeselectAnnotationView view: MKAnnotationView) {

        view.hidden = true
    }