Swift 3 谷歌地图在触摸时添加标记

Question

我在使用谷歌地图标记时遇到问题，我想将标记放在触摸上，但我不知道如何处理我尝试了几种方法，但它不起作用，然后我触摸地图没有任何反应。 pressrecognizer 好像有问题。

更新：

class MainMapController: UIViewController, CLLocationManagerDelegate {

@IBOutlet weak var viewMap: GMSMapView!
var makers: [GMSMarker] = []

var locationManager = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()


    initializeTheLocationManager()
    self.viewMap.isMyLocationEnabled = true
  let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress))
  self.viewMap.addGestureRecognizer(longPressRecognizer)


}

  func handleLongPress(recognizer: UILongPressGestureRecognizer)
   {
if (recognizer.state == UIGestureRecognizerState.began)
{
  let longPressPoint = recognizer.location(in: self.viewMap);
  let coordinate = viewMap.projection.coordinate(for: longPressPoint )
  let marker = GMSMarker(position: coordinate)
  marker.opacity = 0.6
  marker.title = "Current Location"
  marker.snippet = ""
  marker.map = viewMap
  makers.append(marker)
    }
  }


func initializeTheLocationManager()
{
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
}


func locationManager(_ manager: CLLocationManager,      didUpdateLocations locations: [CLLocation]) {

    var location = locationManager.location?.coordinate

    cameraMoveToLocation(toLocation: location)
    locationManager.stopUpdatingLocation()     
}    
func cameraMoveToLocation(toLocation: CLLocationCoordinate2D?) {
    if toLocation != nil {
        viewMap.camera = GMSCameraPosition.camera(withTarget: toLocation!, zoom: 15)        
    }
    }

Answer 1

您不应该为 Google 地图手动添加手势识别器，它会自行管理交互，并有专门的委托函数来处理常见手势。

要在 GSMMapView 上长按，请确保您设置了委托

self.mapView.delegate = self

然后连接适当的委托函数

extension ViewController: GMSMapViewDelegate {
    func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {
         // Custom logic here
         let marker = GMSMarker()
         marker.position = coordinate
         marker.title = "I added this with a long tap"
         marker.snippet = ""
         marker.map = mapView
    }
}

上面的代码会在你长按的位置添加一个标记，你也可以添加一个标题和sn-p，你可以看到。实际将其添加到地图的部分是marker.map = mapView