didChangeCameraPosition获取可用坐标的边界框/矩形

Question

如何从GMSCameraPosition中检索GMSCoordinateBounds？每当用户移动相机时，我想知道地图上的可见坐标（至少是东北/西南点），如下所示：

(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;