docs(main.dart, basic_provider_page.dart): 更新注释和格式

在 main.dart 文件中添加了对 Flutter 应用程序结构的详细注释，增强代码可读性。
在 basic_provider_page.dart 文件中调整了注释格式，确保一致性和清晰性。

lib/main.dart

@@ -1,5 +1,10 @@
+// 导入 Flutter 的 Material UI 包，用于构建用户界面
 import 'package:flutter/material.dart';
+
+// 导入 provider 包，用于状态管理
 import 'package:provider/provider.dart';
+
+// 导入各个示例页面的文件
 import 'pages/basic_provider_page.dart';
 import 'pages/multi_provider_page.dart';
 import 'pages/change_notifier_page.dart';
@@ -9,43 +14,66 @@ import 'pages/future_provider_page.dart';
 import 'pages/stream_provider_page.dart';
 import 'pages/proxy_provider_page.dart';
 
+// Flutter 应用程序的入口点
 void main() {
+  // 运行 MyApp 小部件作为应用程序的根
   runApp(const MyApp());
 }
 
+// MyApp 是一个无状态小部件，是应用程序的根小部件
 class MyApp extends StatelessWidget {
+  // MyApp 的构造函数
   const MyApp({super.key});
 
+  // build 方法描述了如何构建小部件的用户界面
   @override
   Widget build(BuildContext context) {
+    // MaterialApp 是一个 Flutter 提供的便捷小部件，封装了应用程序通常需要的一些功能
     return MaterialApp(
+      // 应用程序的标题，通常在任务切换器中显示
       title: 'Provider Examples',
+      // 应用程序的主题
       theme: ThemeData(
+        // 设置主题的主色调为蓝色
         primarySwatch: Colors.blue,
       ),
+      // 应用程序启动时显示的首页
       home: const HomePage(),
     );
   }
 }
 
+// HomePage 是一个无状态小部件，用于显示 Provider 示例的列表
 class HomePage extends StatelessWidget {
+  // HomePage 的构造函数
   const HomePage({super.key});
 
+  // build 方法描述了如何构建小部件的用户界面
   @override
   Widget build(BuildContext context) {
+    // Scaffold 是 Material Design 布局结构的基本实现
     return Scaffold(
+      // 应用程序栏
       appBar: AppBar(
+        // 应用程序栏的标题
         title: const Text('Provider Examples'),
       ),
+      // 页面的主体内容，使用 ListView 来显示可滚动的列表
       body: ListView(
+        // 列表中的子项
         children: [
+          // 列表项：基本 Provider 示例
           ListTile(
+            // 列表项的标题
             title: const Text('Basic Provider'),
+            // 点击列表项时的回调函数
             onTap: () => Navigator.push(
               context,
+              // 创建一个 MaterialPageRoute 来导航到 BasicProviderPage
               MaterialPageRoute(builder: (_) => const BasicProviderPage()),
             ),
           ),
+          // 列表项：MultiProvider 示例
           ListTile(
             title: const Text('MultiProvider'),
             onTap: () => Navigator.push(
@@ -53,6 +81,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const MultiProviderPage()),
             ),
           ),
+          // 列表项：ChangeNotifierProvider 示例
           ListTile(
             title: const Text('ChangeNotifierProvider'),
             onTap: () => Navigator.push(
@@ -60,6 +89,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const ChangeNotifierPage()),
             ),
           ),
+          // 列表项：Consumer 示例
           ListTile(
             title: const Text('Consumer'),
             onTap: () => Navigator.push(
@@ -67,6 +97,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const ConsumerPage()),
             ),
           ),
+          // 列表项：Selector 示例
           ListTile(
             title: const Text('Selector'),
             onTap: () => Navigator.push(
@@ -74,6 +105,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const SelectorPage()),
             ),
           ),
+          // 列表项：FutureProvider 示例
           ListTile(
             title: const Text('FutureProvider'),
             onTap: () => Navigator.push(
@@ -81,6 +113,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const FutureProviderPage()),
             ),
           ),
+          // 列表项：StreamProvider 示例
           ListTile(
             title: const Text('StreamProvider'),
             onTap: () => Navigator.push(
@@ -88,6 +121,7 @@ class HomePage extends StatelessWidget {
               MaterialPageRoute(builder: (_) => const StreamProviderPage()),
             ),
           ),
+          // 列表项：ProxyProvider 示例
           ListTile(
             title: const Text('ProxyProvider'),
             onTap: () => Navigator.push(

lib/pages/basic_provider_page.dart

@@ -16,7 +16,9 @@ class UserInfo extends ChangeNotifier {
         _email = email;
 
   String get name => _name;
+
   int get age => _age;
+
   String get email => _email;
 
   void updateName(String newName) {
@@ -47,6 +49,7 @@ class AppConfig extends ChangeNotifier {
         _language = language;
 
   String get theme => _theme;
+
   String get language => _language;
 
   void toggleTheme() {
@@ -88,9 +91,7 @@ class BasicProviderPage extends StatelessWidget {
         ),
       ],
       child: Scaffold(
-        appBar: AppBar(
-          title: const Text('Basic Provider')
-        ),
+        appBar: AppBar(title: const Text('Basic Provider')),
         body: const SingleChildScrollView(
           child: Padding(
             padding: EdgeInsets.all(16.0),
@@ -129,8 +130,7 @@ class UpdateSection extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            const Text('Update Examples:',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            const Text('Update Examples:', style: TextStyle(fontWeight: FontWeight.bold)),
             const SizedBox(height: 10),
 
             // 用户信息更新按钮
@@ -140,10 +140,7 @@ class UpdateSection extends StatelessWidget {
               children: [
                 ElevatedButton(
                   onPressed: () {
-                    context.read<UserInfo>().updateName(
-                        context.read<UserInfo>().name == 'John Doe'
-                            ? 'Jane Doe'
-                            : 'John Doe');
+                    context.read<UserInfo>().updateName(context.read<UserInfo>().name == 'John Doe' ? 'Jane Doe' : 'John Doe');
                   },
                   child: const Text('Toggle Name'),
                 ),
@@ -154,10 +151,9 @@ class UpdateSection extends StatelessWidget {
                 ElevatedButton(
                   onPressed: () {
                     final currentEmail = context.read<UserInfo>().email;
-                    context.read<UserInfo>().updateEmail(
-                        currentEmail == 'john@example.com'
-                            ? 'jane@example.com'
-                            : 'john@example.com');
+                    context
+                        .read<UserInfo>()
+                        .updateEmail(currentEmail == 'john@example.com' ? 'jane@example.com' : 'john@example.com');
                   },
                   child: const Text('Toggle Email'),
                 ),
@@ -226,8 +222,7 @@ class WatchExample extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            const Text('Watch Example:',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            const Text('Watch Example:', style: TextStyle(fontWeight: FontWeight.bold)),
             Text('Message: $message'),
             Text('User: ${userInfo.name}, Age: ${userInfo.age}'),
           ],
@@ -251,8 +246,7 @@ class ReadExample extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-             Text('Read Example: ${userInfo.name}',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            Text('Read Example: ${userInfo.name}', style: TextStyle(fontWeight: FontWeight.bold)),
             ElevatedButton(
               onPressed: () {
                 final userInfo = context.read<UserInfo>();
@@ -284,8 +278,7 @@ class SelectExample extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            const Text('Select Example:',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            const Text('Select Example:', style: TextStyle(fontWeight: FontWeight.bold)),
             Text('Language: $language'),
             Text('Theme: $theme'),
           ],
@@ -298,6 +291,7 @@ class SelectExample extends StatelessWidget {
 // 使用 Consumer 方式访问数据
 class ConsumerExample extends StatelessWidget {
   const ConsumerExample({super.key});
+
   @override
   Widget build(BuildContext context) {
     return Card(
@@ -306,8 +300,7 @@ class ConsumerExample extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            const Text('Consumer Example:',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            const Text('Consumer Example:', style: TextStyle(fontWeight: FontWeight.bold)),
             Consumer<UserInfo?>(
               builder: (context, userInfo, child) {
                 if (userInfo == null) {
@@ -330,7 +323,6 @@ class ConsumerExample extends StatelessWidget {
   }
 }
 
-
 // 使用 Provider.of 方式访问数据
 class OfExample extends StatelessWidget {
   const OfExample({super.key});
@@ -348,8 +340,7 @@ class OfExample extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            const Text('Provider.of Example:',
-                style: TextStyle(fontWeight: FontWeight.bold)),
+            const Text('Provider.of Example:', style: TextStyle(fontWeight: FontWeight.bold)),
             Text('Theme: ${appConfig.theme}'),
             Text('User: ${userInfo.name}'),
           ],