Ios谷歌地图保持当前的位置课程（角度）总是北像谷歌导航

我正在使用谷歌地图跟踪

func ShowcurrentMarker() { currentlocationCoordinate = CLLocationCoordinate2DMake(LatestLocation.coordinate.latitude, LatestLocation.coordinate.longitude) if(CurrentLocationMarker == nil) { CurrentLocationMarker = GMSMarker(position:currentlocationCoordinate) CurrentLocationMarker.map = self.mapView CurrentLocationMarker.icon = UIImage.init(named:"car_icon") mapView.camera = GMSCameraPosition.camera(withTarget: CLLocationCoordinate2DMake(LatestLocation.coordinate.latitude, LatestLocation.coordinate.longitude), zoom: 15.0) } else { CATransaction.begin() CATransaction.setAnimationDuration(2) CurrentLocationMarker.position = currentlocationCoordinate CurrentLocationMarker.rotation = CLLocationDirection.abs(LatestLocation.course) mapView.camera = GMSCameraPosition.camera(withTarget: CLLocationCoordinate2DMake(LatestLocation.coordinate.latitude, LatestLocation.coordinate.longitude), zoom:mapView.camera.zoom) CATransaction.commit() } } 

这是我的工作代码。 现在我希望我的汽车始终保持朝北的导航应用程序。

我怎样才能做到这一点 ？