Flutter垂直导航栏插件vertical_nav_bar的使用

Flutter垂直导航栏插件vertical_nav_bar的使用

通过使用此插件，您可以在Flutter中轻松创建一个漂亮的垂直导航栏，并在不同的操作系统上使用它。以下是关于如何使用该插件的文档。

如何使用？

首先，在Scaffold中定义所需的垂直导航栏：

VerticalNavBar(
  selectedIndex: currentRoute,
  height: MediaQuery.of(context).size.height,
  width: MediaQuery.of(context).size.width * 25 / 100,
  onItemSelected: (value) {
    setState(() {
      _navigateRoutes(value);
    });
  },
  items: const [
    VerticalNavBarItem(
      title: "H O M E",
    ),
    VerticalNavBarItem(
      title: "S E T T I N G S",
    ),
    VerticalNavBarItem(
      title: "P R O F I L E",
    ),
    VerticalNavBarItem(
      title: " S E A R C H",
    ),
  ],
)

参数说明

使用示例

以下是一个完整的示例，展示了如何在Flutter应用中使用vertical_nav_bar插件。

import 'package:flutter/material.dart';

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int currentRoute = 0;

  [@override](/user/override)
  Widget build(BuildContext context) {
    List<Widget> myRoutes = [
      SizedBox(
        width: MediaQuery.of(context).size.width * 75 / 100,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: const [
            Text(
              "PAGE 1",
              style: TextStyle(
                color: Colors.black,
                fontSize: 50,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
      SizedBox(
        width: MediaQuery.of(context).size.width * 75 / 100,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: const [
            Text(
              "PAGE 2",
              style: TextStyle(
                color: Colors.black,
                fontSize: 50,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
      SizedBox(
        width: MediaQuery.of(context).size.width * 75 / 100,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: const [
            Text(
              "PAGE 3",
              style: TextStyle(
                color: Colors.black,
                fontSize: 50,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
      SizedBox(
        width: MediaQuery.of(context).size.width * 75 / 100,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: const [
            Text(
              "PAGE 4",
              style: TextStyle(
                color: Colors.black,
                fontSize: 50,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
    ];

    return Scaffold(
      body: Center(
        child: Row(
          children: [
            Column(
              mainAxisAlignment: MainAxisAlignment.start,
              children: [
                VerticalNavBar(
                  selectedIndex: currentRoute,
                  height: MediaQuery.of(context).size.height,
                  width: MediaQuery.of(context).size.width * 25 / 100,
                  onItemSelected: (value) {
                    setState(() {
                      _navigateRoutes(value);
                    });
                  },
                  items: const [
                    VerticalNavBarItem(
                      title: "H O M E",
                    ),
                    VerticalNavBarItem(
                      title: "S E T T I N G S",
                    ),
                    VerticalNavBarItem(
                      title: "P R O F I L E",
                    ),
                    VerticalNavBarItem(
                      title: " S E A R C H",
                    ),
                  ],
                )
              ],
            ),
            Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [myRoutes[currentRoute]],
            ),
          ],
        ),
      ),
    );
  }

  void _navigateRoutes(int selectedIndex) {
    setState(() {
      currentRoute = selectedIndex;
    });
  }
}