Flutter垂直标签栏插件 vertical_tab_bar_view 的使用

vertical_tab_bar_view 是一个Flutter插件，它允许你创建一个垂直滚动的标签栏，而不需要像默认的 TabBarView 那样自动对齐。这个插件非常简单易用，只需将你的 TabBarView 替换为 VerticalTabBarView 即可。

快速开始

安装插件

首先，在你的 pubspec.yaml 文件中添加 vertical_tab_bar_view 依赖：

dependencies:
  flutter:
    sdk: flutter
  vertical_tab_bar_view: ^0.1.2

然后运行 flutter pub get 来安装插件。

示例代码

以下是一个完整的示例，展示了如何使用 VerticalTabBarView 来创建一个垂直滚动的标签栏。

主应用入口

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

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primaryColor: Colors.white,
        accentColor: Colors.redAccent,
      ),
      home: Banner(
        message: 'Example',
        location: BannerLocation.topEnd,
        child: MyHomePage(title: 'Vertical Tab Bar Example'),
      ),
    );
  }
}

主页面

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
  final List<Category> categories = [];
  late TabController _tabController;

  void fetchAllCategories() {
    // 模拟获取数据
    setState(() {
      categories.addAll([
        Category(name: 'Category 1'),
        Category(name: 'Category 2'),
        Category(name: 'Category 3'),
      ]);
      _tabController = TabController(length: categories.length, vsync: this);
    });
  }

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
        bottom: _tabController == null
            ? null
            : TabBar(
                controller: _tabController,
                labelColor: Colors.redAccent,
                unselectedLabelColor: Colors.black,
                isScrollable: true,
                tabs: [
                  for (Category category in categories) Tab(text: category.name)
                ],
              ),
      ),
      body: _tabController == null
          ? Center(child: CircularProgressIndicator())
          : VerticalTabBarView(
              controller: _tabController,
              children: [
                for (Category category in categories)
                  TabView(category: category)
              ],
            ),
    );
  }
}

class Category {
  final String name;
  Category({required this.name});
}

标签视图

class TabView extends StatefulWidget {
  const TabView({
    Key? key,
    required this.category,
  }) : super(key: key);

  final Category category;

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

class _TabViewState extends State<TabView> {
  final List<Product> _products = [];

  void fetchProducts(String category) {
    // 模拟获取产品数据
    setState(() {
      _products.addAll([
        Product(name: 'Product 1', category: widget.category.name),
        Product(name: 'Product 2', category: widget.category.name),
      ]);
    });
  }

  [@override](/user/override)
  void initState() {
    fetchProducts(widget.category.name);
    super.initState();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Column(
        children: [
          Align(
            alignment: Alignment.topLeft,
            child: Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text(
                widget.category.name,
                style: TextStyle(
                  fontWeight: FontWeight.bold,
                  fontSize: 36,
                ),
              ),
            ),
          ),
          for (Product product in _products)
            ListTile(
              title: Text(product.name),
              subtitle: Text(product.category),
              onTap: () {},
            ),
        ],
      ),
    );
  }
}

class Product {
  final String name;
  final String category;
  Product({required this.name, required this.category});
}