Flutter嵌套菜单栏插件nested_menu_bar的使用

嵌套菜单栏（Nested Menu Bar）是一个用于Flutter的水平菜单栏。基于PlutoMenuBar。

特性

• 多级子菜单：你可以在一个菜单中添加多个子菜单。你可以根据需要添加任意数量的子菜单。
• 可定制化：你可以根据需要自定义菜单栏。你也可以自定义子菜单弹出框和子菜单项。
• 复选框、单选按钮、图标、文本：你可以在菜单项中添加复选框、单选按钮、图标和文本。
• 不同类型的菜单：你可以通过不同的onTap和onHover打开子菜单。
• 易于使用：你可以轻松地在项目中使用该菜单栏。

开始使用

从pub.dev获取包，将以下内容添加到你的pubspec.yaml文件中：

dependencies:
  nested_menu_bar: ^1.0.0

使用示例

以下是一个完整的示例代码，展示了如何在Flutter应用中使用嵌套菜单栏插件。

import 'package:flutter/material.dart';
import 'package:nested_menu_bar/nested_menu_bar.dart';

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  late final List<NestedMenuItem> hoverMenu;

  @override
  void initState() {
    super.initState();
    hoverMenu = _makeMenus(context);
  }

  void message(BuildContext context, String text) {
    ScaffoldMessenger.of(context).hideCurrentSnackBar();

    final snackBar = SnackBar(
      content: Text(text),
    );

    ScaffoldMessenger.of(context).showSnackBar(snackBar);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SingleChildScrollView(
        child: NestedMenuBar(
          menus: hoverMenu,
          popUpMenuItemBorderRadius: 8,
          menuBarDecoration: BoxDecoration(
            color: Colors.black,
            boxShadow: [
              BoxShadow(
                color: Colors.black.withOpacity(0.5),
                spreadRadius: 5,
                blurRadius: 7,
                offset: const Offset(0, 3),
              ),
            ],
          ),
          menuBarItemHoverColor: Colors.white,
          menuBarItemColor: Colors.grey,
          popUpDecoration: BoxDecoration(
            color: Colors.black,
            border: Border.all(color: Colors.grey, width: 2),
            borderRadius: BorderRadius.circular(8),
          ),
          popUpPadding: 10,
          popUpMenuItemHoverForegroundColor: Colors.white,
          popUpMenuItemForegroundColor: Colors.grey,
          popUpMenuItemBackgroundColor: Colors.black,
          popUpMenuItemHoverBackgroundColor: Colors.grey,
        ),
      ),
    );
  }

  List<NestedMenuItem> _makeMenus(BuildContext context) {
    return [
      NestedMenuItem(
        title: "Home",
        icon: Icons.home,
        onTap: () => message(context, "Home"),
      ),
      NestedMenuItem(
        title: "Services",
        children: [
          NestedMenuItem(title: "DevOps", onTap: () => message(context, "DevOps")),
          NestedMenuItem(title: "Database modernization", onTap: () => message(context, "Database modernization")),
          NestedMenuItem(title: "Windows migration", onTap: () => message(context, "Windows migration")),
          NestedMenuItem(title: "Tailored cloud migration", onTap: () => message(context, "Tailored cloud migration")),
          NestedMenuItem(title: "Cloud storage solutions", onTap: () => message(context, "Cloud storage solutions")),
          NestedMenuItem(title: "DR solutions", onTap: () => message(context, "DR solutions")),
          NestedMenuItem(title: "Managed services", onTap: () => message(context, "Managed services")),
          NestedMenuItem(
            title: "App Development",
            onTap: () => message(context, "App Development"),
            children: [
              NestedMenuItem(
                title: "Mobile App Development",
                onTap: () => message(context, "Mobile App Development"),
                children: [
                  NestedMenuItem(
                    title: "Native App Development",
                    onTap: () => message(context, "Native App Development"),
                    children: [
                      NestedMenuItem(title: "Android App Development", onTap: () => message(context, "Android App Development")),
                      NestedMenuItem(title: "iOS App Development", onTap: () => message(context, "iOS App Development")),
                    ],
                  ),
                  NestedMenuItem(
                    title: "Cross Platform Development",
                    onTap: () => message(context, "Cross Platform Development"),
                    children: [
                      NestedMenuItem(title: "Flutter App Development", onTap: () => message(context, "Flutter App Development")),
                      NestedMenuItem(title: "React Native App Development", onTap: () => message(context, "React Native App Development")),
                    ],
                  ),
                ],
              ),
              NestedMenuItem(title: "Web App Development", onTap: () => message(context, "Web App Development")),
            ],
          ),
        ],
      ),
      NestedMenuItem(title: "About Us"),
    ];
  }
}

截图

Example

其他信息

• 如需编辑包代码的帮助，请查看文档。

许可证

该项目受MIT许可证保护。详细信息请参阅LICENSE文件。