flutter-解決長按TextField出現英文（復制粘貼）問題

第一步 引入依賴

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

第二步 在main.dart中添加代碼

 MaterialApp(
   //省略若干代碼........
  //國際化
  localizationsDelegates: [
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
    GlobalCupertinoLocalizations.delegate,
  ],
  supportedLocales: [
    const Locale('zh', 'CN'),
    const Locale('en', 'US'),
  ],
）

第三步 重啟app