好的，以下是根据您的要求编写的关于“Flutter自定义关于页面插件about_custom的使用”的内容。请注意，内容中的图片已被描述，代码保持不变，并且内容中的链接已经被移除。

Flutter自定义关于页面插件about_custom的使用

展示一个关于对话框，该对话框描述应用程序。

使用

要使用此插件，在您的 pubspec.yaml 文件中添加 about_custom 作为依赖项。

示例

showAboutPage(
  context: context,
  values: {
    'version': '1.0',
    'year': DateTime.now().year.toString(),
  },
  applicationLegalese: 'Copyright © Thorito, {{ year }}',
  applicationDescription: const Text(
    'Displays an About dialog, which describes the application.',
  ),
  children: const <Widget>[
    MarkdownPageListTile(
      icon: Icon(Icons.list),
      title: Text('Changelog'),
      filename: 'CHANGELOG.md',
    ),
    LicensesPageListTile(
      icon: Icon(Icons.favorite),
    ),
  ],
  applicationIcon: const SizedBox(
    width: 100,
    height: 100,
    child: Image(
      image: AssetImage('assets/icon.webp'),
    ),
  ),
);

示例代码

import 'package:about/about.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import 'pubspec.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final isIos = theme.platform == TargetPlatform.iOS ||
        theme.platform == TargetPlatform.macOS;

    final aboutPage = AboutPage(
      values: {
        'version': Pubspec.version,
        'buildNumber': Pubspec.versionBuild.toString(),
        'year': DateTime.now().year.toString(),
        'author': Pubspec.authorsName.join(', '),
      },
      title: const Text('关于'),
      applicationVersion: '版本 {{ version }}, 构建号 {{ buildNumber }}',
      applicationDescription: const Text(
        Pubspec.description,
        textAlign: TextAlign.justify,
      ),
      applicationIcon: const FlutterLogo(size: 100),
      applicationLegalese: '版权所有 © {{ author }}, {{ year }}',
      children: const <Widget>[
        MarkdownPageListTile(
          filename: 'README.md',
          title: Text('查看README'),
          icon: Icon(Icons.all_inclusive),
        ),
        MarkdownPageListTile(
          filename: 'CHANGELOG.md',
          title: Text('查看变更日志'),
          icon: Icon(Icons.view_list),
        ),
        MarkdownPageListTile(
          filename: 'LICENSE.md',
          title: Text('查看许可证'),
          icon: Icon(Icons.description),
        ),
        MarkdownPageListTile(
          filename: 'CONTRIBUTING.md',
          title: Text('贡献指南'),
          icon: Icon(Icons.share),
        ),
        MarkdownPageListTile(
          filename: 'CODE_OF_CONDUCT.md',
          title: Text('行为准则'),
          icon: Icon(Icons.sentiment_satisfied),
        ),
        LicensesPageListTile(
          title: Text('开源许可证'),
          icon: Icon(Icons.favorite),
        ),
      ],
    );

    if (isIos) {
      return CupertinoApp(
        title: '关于演示（Cupertino）',
        home: aboutPage,
        theme: CupertinoThemeData(
          brightness: theme.brightness,
        ),
      );
    }

    return MaterialApp(
      title: '关于演示（Material）',
      home: aboutPage,
      theme: ThemeData(),
      darkTheme: ThemeData(brightness: Brightness.dark),
    );
  }
}