1、增加导包

lib/flutter_clx_base.dart

@@ -5,6 +5,7 @@ export 'common/gaps.dart';
 export 'utils/image_utils.dart';
 export 'utils/keyboard_utils.dart';
 export 'utils/load_net_image.dart';
+export 'utils/loading_utils.dart';
 export 'utils/toast_util.dart';
 export 'widget/my_app_bar.dart';
 export 'widget/my_scaffold.dart';