在Flutter中，例如iOS的狀態列中的時間、網路訊號等字型的顏色修改有以下兩個方式：
在system_chrome.dart檔案中有兩段程式碼，用來更改不同的狀態列字型顏色。

介紹

1. 字型顏色白色

/// System overlays should be drawn with a light color. Intended for
  /// applications with a dark background.
  static const SystemUiOverlayStyle light = SystemUiOverlayStyle(
    systemNavigationBarColor: Color(0xFF000000),
    systemNavigationBarDividerColor: null,
    statusBarColor: null,
    systemNavigationBarIconBrightness: Brightness.light,
    statusBarIconBrightness: Brightness.light,
    statusBarBrightness: Brightness.dark,
  );
 

2. 字型顏色黑色

/// System overlays should be drawn with a dark color. Intended for
  /// applications with a light background.
  static const SystemUiOverlayStyle dark = SystemUiOverlayStyle(
    systemNavigationBarColor: Color(0xFF000000),
    systemNavigationBarDividerColor: null,
    statusBarColor: null,
    systemNavigationBarIconBrightness: Brightness.light,
    statusBarIconBrightness: Brightness.dark,
    statusBarBrightness: Brightness.light,
  );
 

使用

白色

void main() {
  runApp(MyApp());
  //白色
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light);
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: Scaffold(
        backgroundColor: Colors.blue,
        body: Container(),
      ),
    );
  }
}
 

黑色

void main() {
  runApp(MyApp());
  //黑色
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.dark);
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: Scaffold(
        backgroundColor: Colors.white,
        body: Container(),
      ),
    );
  }
}

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