Google maps 使用UILongPressGestureRecognitizer swift3向谷歌地图添加标记
我想用UILongPressGestureRecognitor添加标记,但我的代码不工作,我做错了什么Google maps 使用UILongPressGestureRecognitizer swift3向谷歌地图添加标记,google-maps,swift3,marker,Google Maps,Swift3,Marker,我想用UILongPressGestureRecognitor添加标记,但我的代码不工作,我做错了什么 func setupGesture() { let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(action)) longPressRecognizer.minimumPressDuration = 1.0 mapView.a
func setupGesture() {
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(action))
longPressRecognizer.minimumPressDuration = 1.0
mapView.addGestureRecognizer(longPressRecognizer)
}
func action(recognizer: UILongPressGestureRecognizer) {
if (recognizer.state == .ended) {
DispatchQueue.main.async {
let longPressPoint = recognizer.location(in: mapView)
let coordinate = self.mapView.projection.coordinate(for: longPressPoint)
let marker = GMSMarker(position: coordinate)
marker.title = "Hello World"
marker.map = mapView
}
}
}
这种方法不太管用
extension MapViewController: GMSMapViewDelegate {
func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {
DispatchQueue.main.async {
let marker = GMSMarker(position: coordinate)
marker.title = "Hello World"
marker.map = mapView
}
}
}
这个代码对我来说非常好。您不需要UILongTapGestureRecograiser,只需设置mapView委托并使用DidLongTap委托函数即可
class ViewController: UIViewController {
var mapView: GMSMapView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.mapView.delegate = self
}
override func loadView() {
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
let camera = GMSCameraPosition.camera(withLatitude: -33.86, longitude: 151.20, zoom: 6.0)
self.mapView = GMSMapView.map(withFrame: CGRect.zero, camera: camera)
view = mapView
// Creates a marker in the center of the map.
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude: -33.86, longitude: 151.20)
marker.title = "Sydney"
marker.snippet = "Australia"
marker.map = mapView
}
}
extension ViewController: GMSMapViewDelegate {
func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {
let marker = GMSMarker()
marker.position = coordinate
marker.title = ""
marker.snippet = ""
marker.map = mapView
}
}
确保在主线程DispatchQueue.main.async{//您的标记代码是的,我在主线程中更新了,但是标记没有出现感谢您共享代码,我忘记了在ViewDidLoad中设置mapView.delegate=self