Flutter标签页管理插件flutter_tabs的使用

Flutter标签页管理插件flutter_tabs的使用

在本教程中，我们将详细介绍如何使用flutter_tabs插件来管理标签页。flutter_tabs提供了多种类型的标签栏（如线性、圆形和标准标签栏），并且支持垂直方向的标签栏。

示例代码

首先，我们需要引入flutter_tabs包。你可以在pubspec.yaml文件中添加以下依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_tabs: ^0.1.0 # 确保使用最新版本

然后运行flutter pub get来获取该库。

接下来，我们来看一个简单的示例代码，展示如何在应用中使用flutter_tabs。

import 'package:flutter/material.dart';

import 'linear_tab_bar_page.dart';
import 'pinned_linear_tab_bar_page.dart';
import 'round_tab_bar_page.dart';
import 'standard_tab_bar_page.dart';
import 'vertical_round_tab_bar_page.dart';

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

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

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, this.title}) : super(key: key);
  final String? title;

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

class _MyHomePageState extends State<MyHomePage> {
  Widget _buildItem(BuildContext context, String title, Widget widget) {
    return InkWell(
      onTap: () {
        Navigator.of(context).push(MaterialPageRoute(builder: (context) => widget));
      },
      child: Container(
        padding: EdgeInsets.all(10),
        child: Text(title),
      ),
    );
  }

  [@override](/user/override)
  void initState() {
    super.initState();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title!),
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          _buildItem(context, "Linear Tab Bar", LinearTabBarPage()),
          _buildItem(context, "Pinned Linear Tab Bar", PinnedLinearTabBarPage()),
          _buildItem(context, "Standard Tab Bar", StandardTabBarPage()),
          _buildItem(context, "Round Tab Bar", RoundTabBarPage()),
          _buildItem(context, "Vertical Round Tab Bar", VerticalRoundTabBarPage()),
        ],
      ),
    );
  }
}

示例页面

Linear Tab Bar

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

class LinearTabBarPage extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          bottom: TabBar(
            tabs: [
              Tab(text: 'Tab 1'),
              Tab(text: 'Tab 2'),
              Tab(text: 'Tab 3'),
            ],
          ),
        ),
        body: TabBarView(
          children: [
            Center(child: Text('Content of Tab 1')),
            Center(child: Text('Content of Tab 2')),
            Center(child: Text('Content of Tab 3')),
          ],
        ),
      ),
    );
  }
}

Pinned Linear Tab Bar

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

class PinnedLinearTabBarPage extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          bottom: PreferredSize(
            preferredSize: Size.fromHeight(kToolbarHeight),
            child: Container(
              color: Colors.grey[300],
              child: TabBar(
                tabs: [
                  Tab(text: 'Tab 1'),
                  Tab(text: 'Tab 2'),
                  Tab(text: 'Tab 3'),
                ],
              ),
            ),
          ),
        ),
        body: TabBarView(
          children: [
            Center(child: Text('Content of Tab 1')),
            Center(child: Text('Content of Tab 2')),
            Center(child: Text('Content of Tab 3')),
          ],
        ),
      ),
    );
  }
}

Standard Tab Bar

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

class StandardTabBarPage extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          bottom: TabBar(
            tabs: [
              Tab(text: 'Tab 1'),
              Tab(text: 'Tab 2'),
              Tab(text: 'Tab 3'),
            ],
          ),
        ),
        body: TabBarView(
          children: [
            Center(child: Text('Content of Tab 1')),
            Center(child: Text('Content of Tab 2')),
            Center(child: Text('Content of Tab 3')),
          ],
        ),
      ),
    );
  }
}

Round Tab Bar

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

class RoundTabBarPage extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          bottom: TabBar(
            indicatorColor: Colors.transparent,
            labelColor: Colors.blue,
            unselectedLabelColor: Colors.grey,
            tabs: [
              Tab(text: 'Tab 1'),
              Tab(text: 'Tab 2'),
              Tab(text: 'Tab 3'),
            ],
          ),
        ),
        body: TabBarView(
          children: [
            Center(child: Text('Content of Tab 1')),
            Center(child: Text('Content of Tab 2')),
            Center(child: Text('Content of Tab 3')),
          ],
        ),
      ),
    );
  }
}

Vertical Round Tab Bar

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

class VerticalRoundTabBarPage extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          bottom: PreferredSize(
            preferredSize: Size.fromHeight(kToolbarHeight),
            child: Container(
              color: Colors.grey[300],
              child: TabBar(
                indicatorColor: Colors.transparent,
                labelColor: Colors.blue,
                unselectedLabelColor: Colors.grey,
                tabs: [
                  Tab(text: 'Tab 1'),
                  Tab(text: 'Tab 2'),
                  Tab(text: 'Tab 3'),
                ],
                isScrollable: true,
              ),
            ),
          ),
        ),
        body: TabBarView(
          children: [
            Center(child: Text('Content of Tab 1')),
            Center(child: Text('Content of Tab 2')),
            Center(child: Text('Content of Tab 3')),
          ],
        ),
      ),
    );
  }
}