flutter 修改狀態欄字體顏色的3種方法

第一種：

    SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
      statusBarColor: Colors.transparent,
      statusBarIconBrightness: Brightness.dark,
      statusBarBrightness:
          !kIsWeb && Platform.isAndroid ? Brightness.dark : Brightness.light,
      systemNavigationBarColor: Colors.white,
      systemNavigationBarDividerColor: Colors.transparent,
      systemNavigationBarIconBrightness: Brightness.dark,
    ));

第二種：

AnnotatedRegion<SystemUiOverlayStyle>(
      value: context.watch<ThemeManager>().brightness == Brightness.dark
          ? SystemUiOverlayStyle.light.copyWith(
              statusBarColor: Colors.grey.shade900.withOpacity(0.4),
              systemNavigationBarColor: Colors.deepPurple.shade100,
              // systemNavigationBarDividerColor: Colors.deepPurple.shade100,
              systemNavigationBarIconBrightness: Brightness.dark)
          : SystemUiOverlayStyle.dark.copyWith(
              statusBarColor: Colors.grey.shade100.withOpacity(0.6),
              systemNavigationBarColor: Colors.deepPurple.shade100,
              // systemNavigationBarDividerColor: Colors.deepPurple.shade100,
              systemNavigationBarIconBrightness: Brightness.dark),
      child: MaterialApp
...

第三種：

AppBar(
  systemOverlayStyle: SystemUiOverlayStyle.light,
),