如何用单个标记多次点击

Question

通过点击，它使标记无限。我想要一个我点击的标记。一遍又一遍地。没有很多标记。

我使用了 MapView.clean()。但它会删除每个标记。

func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D)
{
        let marker = GMSMarker(position: coordinate)
        marker.position.latitude = coordinate.latitude
        marker.position.longitude = coordinate.longitude
        print("hello")
        print(markerr.position.latitude)
        let ULlocation = markerr.position.latitude
        let ULlgocation = markerr.position.longitude
        print(ULlocation)
        print(ULlgocation)
        marker.map = self.mapView
}

Answer 1

在didTapAt coordinate 方法之外创建标记并在此方法中更改它的坐标

class ViewController: UIViewController, GMSMapViewDelegate {

    let marker = GMSMarker()

    override func viewDidLoad() {
        super.viewDidLoad()
        marker.map = self.mapView
    }
    func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D)
    {
        marker.position = coordinate
    }
}