Flutter代码规范与推荐插件recommended_lints的使用

本包包含适用于可扩展Flutter项目的推荐lint规则。

使用

仅需将此包添加到dev_dependencies中并启动Dart分析器。

dev_dependencies:
  recommended_lints: ^1.0.0

完整示例Demo

下面是一个完整的Flutter项目结构，展示了如何配置recommended_lints来确保代码质量：

1. 创建一个新的Flutter项目

首先创建一个新的Flutter项目：

flutter create flutter_project_with_lints
cd flutter_project_with_lints

2. 在pubspec.yaml文件中添加recommended_lints

打开pubspec.yaml文件，并在dev_dependencies部分添加recommended_lints依赖：

name: flutter_project_with_lints
description: A new Flutter project with lint rules.

version: 1.0.0+1

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter
  recommended_lints: ^1.0.0 # 添加此行

flutter:
  uses-material-design: true

3. 运行Dart分析器

运行以下命令以启动Dart分析器，检查项目中是否存在任何违反推荐规则的代码：

flutter pub run build_runner watch

4. 编写示例代码

现在，在你的lib/main.dart文件中编写一些示例代码：

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState 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('Flutter Demo Home Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

5. 检查Lint规则

运行以下命令检查代码是否符合recommended_lints规则：

flutter analyze