Flutter在全屏的情况下修改状态栏字体颜色

Widget build(BuildContext context) {
    SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light
        .copyWith(statusBarBrightness: Brightness.dark));
    return Scaffold(

Brightness.dark：把状态栏字体颜色修改为白色

Brightness.light：把状态栏字体颜色修改为黑色