Flutter UI框架插件queen的使用

Flutter UI框架插件queen的使用

简介

queen 是一个用于简化 Flutter 应用开发的 UI 框架插件。它提供了丰富的组件和工具，帮助开发者快速构建美观且功能强大的用户界面。

安装

首先，在 pubspec.yaml 文件中添加 queen 依赖：

dependencies:
  queen: ^x.y.z

然后运行 flutter pub get 来获取该依赖。

基本使用

以下是一个简单的示例，展示了如何使用 queen 构建一个基本的应用。

示例代码

// 导入必要的库
import 'package:flutter/material.dart';
import 'package:queen/queen.dart';
import 'package:queen_example/config/theme.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import 'pages/theme_page.dart';

Future<void> main() async {
  // 初始化 Flutter 绑定
  WidgetsFlutterBinding.ensureInitialized();
  
  // 启动应用并设置主题和语言配置
  await App.boot(
    themeConfig: AppThemeConfig(),
    nationsConfig: const LangConfig(),
  );

  // 运行应用
  runApp(
    QueenBuilder(
      enableDevtools: false,
      builder: (context) {
        return const MyApp();
      },
    ),
  );
}

// 主应用类
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: AppTheme.current,
      locale: AppLang.current,
      supportedLocales: AppLang.supportedLocales,
      localizationsDelegates: const [
        GlobalCupertinoLocalizations.delegate,
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

// 主页面类
class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

// 主页面状态类
class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(Locators.find<TransController>().locale.toString()),
            const Text(
              '你已经按下了按钮这么多次:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            OutlinedButton(
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(builder: (_) => const ThemePage()),
                );
              },
              child: const Text('主题切换'),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: '增加计数',
        child: const Icon(Icons.add),
      ),
    );
  }
}

详细说明

1. 初始化

   Future<void> main() async {
     WidgetsFlutterBinding.ensureInitialized();
     await App.boot(
       themeConfig: AppThemeConfig(),
       nationsConfig: const LangConfig(),
     );
     runApp(
       QueenBuilder(
         enableDevtools: false,
         builder: (context) {
           return const MyApp();
         },
       ),
     );
   }
   

   在 main() 函数中，我们首先确保 Flutter 绑定已初始化，并通过 App.boot() 方法加载应用的主题和语言配置。

2. 应用入口

   class MyApp extends StatelessWidget {
     const MyApp({Key? key}) : super(key: key);
   
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
         title: 'Flutter Demo',
         theme: AppTheme.current,
         locale: AppLang.current,
         supportedLocales: AppLang.supportedLocales,
         localizationsDelegates: const [
           GlobalCupertinoLocalizations.delegate,
           GlobalMaterialLocalizations.delegate,
           GlobalWidgetsLocalizations.delegate,
         ],
         home: const MyHomePage(title: 'Flutter Demo Home Page'),
       );
     }
   }
   

   MyApp 类定义了应用的基本结构，包括标题、主题、本地化信息和初始页面。

3. 主页面

   class MyHomePage extends StatefulWidget {
     const MyHomePage({Key? key, required this.title}) : super(key: key);
   
     final String title;
   
     @override
     State<MyHomePage> createState() => _MyHomePageState();
   }
   
   class _MyHomePageState extends State<MyHomePage> {
     int _counter = 0;
   
     void _incrementCounter() {
       setState(() {
         _counter++;
       });
     }
   
     @override
     Widget build(BuildContext context) {
       return Scaffold(
         appBar: AppBar(
           title: Text(widget.title),
         ),
         body: Center(
           child: Column(
             mainAxisAlignment: MainAxisAlignment.center,
             children: <Widget>[
               Text(Locators.find<TransController>().locale.toString()),
               const Text(
                 '你已经按下了按钮这么多次:',
               ),
               Text(
                 '$_counter',
                 style: Theme.of(context).textTheme.headline4,
               ),
               OutlinedButton(
                 onPressed: () {
                   Navigator.push(
                     context,
                     MaterialPageRoute(builder: (_) => const ThemePage()),
                   );
                 },
                 child: const Text('主题切换'),
               ),
             ],
           ),
         ),
         floatingActionButton: FloatingActionButton(
           onPressed: _incrementCounter,
           tooltip: '增加计数',
           child: const Icon(Icons.add),
         ),
       );
     }
   }