extended_tabs

一个强大的官方扩展库，用于 Tab/TabBar/TabView，支持在当前选项卡滚动超出范围时滚动祖先或子选项卡，并设置滚动方向和缓存范围。

查看演示 查看Github

用法

dependencies:
  flutter:
    sdk: flutter
  extended_tabs: any

ColorTabIndicator

显示带有颜色填充的选项卡指示器

    TabBar(
      indicator: ColorTabIndicator(Colors.blue),
      labelColor: Colors.black,
      tabs: [
        Tab(text: "Tab0"),
        Tab(text: "Tab1"),
      ],
      controller: tabController,
    )

  /// if link is true and current tabbarview over scroll,
  /// it will check and scroll ancestor or child tabbarView.
  /// default is true
  final bool link;
  
  ExtendedTabBarView(
    children: <Widget>[
      List("Tab000"),
      List("Tab001"),
      List("Tab002"),
      List("Tab003"),
    ],
    controller: tabController2,
    link: true,
  )

滚动方向

  /// The axis along which the tab bar and tab view scrolls.
  ///
  /// Defaults to [Axis.horizontal].
  final Axis scrollDirection;

  Row(
    children: <Widget>[
      ExtendedTabBar(
        indicator: const ColorTabIndicator(Colors.blue),
        labelColor: Colors.black,
        scrollDirection: Axis.vertical,
        tabs: const <ExtendedTab>[
          ExtendedTab(
            text: 'Tab0',
            scrollDirection: Axis.vertical,
          ),
          ExtendedTab(
            text: 'Tab1',
            scrollDirection: Axis.vertical,
          ),
        ],
        controller: tabController,
      ),
      Expanded(
        child: ExtendedTabBarView(
          children: <Widget>[
            const ListWidget(
              'Tab1',
              scrollDirection: Axis.horizontal,
            ),
            const ListWidget(
              'Tab1',
              scrollDirection: Axis.horizontal,
            ),
          ],
          controller: tabController,
          scrollDirection: Axis.vertical,
        ),
      )
    ],
      )

缓存范围

  /// cache page count
  /// default is 0.
  /// if cacheExtent is 1, it has two pages in cache
  final int cacheExtent;
  
  ExtendedTabBarView(
    children: <Widget>[
      List("Tab000"),
      List("Tab001"),
      List("Tab002"),
      List("Tab003"),
    ],
    controller: tabController2,
    linkWithAncestor: true,
    cacheExtent: 1,
  )

GitHub

https://github.com/fluttercandies/extended_tabs