didChangeCameraPosition获取可用坐标的包围盒/矩形

我如何从GMSCameraPosition中检索GMSCoordinateBounds？ 我想知道每次用户移动摄像机时地图上的可见坐标（至less东北/西南点）：

(void)mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition *)position 

Answer 1

 GMSVisibleRegion visibleRegion = mapView.projection.visibleRegion; GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] initWithRegion:visibleRegion]; // we've got what we want, but here are NE and SW points CLLocationCoordinate2D northEast = bounds.northEast; CLLocationCoordinate2D southWest = bounds.southWest;