Flutter隐藏导航栏同时允许设置状态栏

1 Scaffold(
2       body: Stack(
3        children: <Widget>[
4            transparentAppBar(brightness: Brightness.light), //可设置brightness的透明导航栏。backgroundColor: Colors.transparent,leftItem: Container(),
5           Container(),        
6       　],
7 　　　　　),
8  ),