找不到谷歌地图SDK (iOS mapview.myLocation )

Question

如何使用Google Maps iOS SDK在地图上显示用户的位置？

我尝试在self.myMapView(MKMapView)中查找.myLocation属性，但找不到。

有人能一步一步地告诉我如何在地图上显示我的用户的位置吗？

Answer 1

创建GMSMapView和CLLocationManager的属性，如

@IBOutlet弱var mapView: GMSMapView！

CLLocationManager locationManager = var ()

var didFindMyLocation = false

在viewdidload方法中，为地图视图添加观察者以进行位置更新，如下所示

override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        locationManager.delegate = self
        locationManager.requestWhenInUseAuthorization()

        let camera: GMSCameraPosition = GMSCameraPosition.cameraWithLatitude(48.857165, longitude: 2.354613, zoom: 2.0)
        mapView.camera = camera
        mapView.delegate = self

        mapView.addObserver(self, forKeyPath: "myLocation", options: NSKeyValueObservingOptions.New, context: nil)

    }

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
        if !didFindMyLocation {
            let myLocation: CLLocation = change![NSKeyValueChangeNewKey] as! CLLocation
            mapView.camera = GMSCameraPosition.cameraWithTarget(myLocation.coordinate, zoom: 10.0)
            mapView.settings.myLocationButton = true

            didFindMyLocation = true
        }
    }

//标记：- CLLocationManagerDelegate

extension MapViewController: CLLocationManagerDelegate {
    func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        if status == CLAuthorizationStatus.AuthorizedWhenInUse {
            mapView.myLocationEnabled = true
        }
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        if let location = locations.first {
            mapView.myLocationEnabled = true
            mapView.settings.myLocationButton = true

            mapView.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)

            locationManager.stopUpdatingLocation()
        }

    }
}

didFindMyLocation是布尔属性，也不要忘记将'NSLocationWhenInUseUsageDescription‘键添加到Info.plist文件中

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Answer 2

此代码将标记设置为所需的coordinated。您可以通过CoreLocation框架(CLLocationManagerDelegate)获取当前位置坐标

self.mapView.camera = GMSCameraPosition.cameraWithLatitude(latitude, longitude: longitude, zoom: 6)

let marker = GMSMarker()
marker.position = CLLocationCoordinate2DMake(latitude, longitude)
marker.title =   "Marker title"
marker.map = self.mapView