flutter - CustomScrollView 内的 TabView

Question

用 SliverFillRemaining 包装 TabBarView(像 Expanded 一样填充剩余的空白空间)会产生以下错误输出。

flutter:RenderPositionedBox 需要一个 RenderBox 类型的子对象，但收到了一个类型的子对象 flutter :RenderSliv​​erList。

TabController tabContoller;
    @override
  void initState() {
    tabContoller = new TabController(
      vsync: this,
      length: 3,
    );


 @override
 Widget build(BuildContext context) {
    return new Scaffold(
        floatingActionButton:floatActionBtn(...),
        bottomNavigationBar: bottomNavigationBar(...),
        appBar: apBar(),
        body: Stack(
          children: <Widget>[
            CustomScrollView(
              slivers: <Widget>[
                SliverAppBar(
                  backgroundColor: Colors.transparent,
                  automaticallyImplyLeading: false,
                  expandedHeight: 195.0,
                  flexibleSpace: FlexibleSpaceBar(
                    background: new Stack(
                        children: <Widget>[
                          ...

                        ]),
                  ),
                ),
                  new SliverFillRemaining(
                    child: TabBarView(
                      controller: tabContoller,
                      children: <Widget>[
                        Tab(...),
                        Tab(...),
                        Tab(...)
                      ],
                    ),
                  ),
              ],
            ),
          ],

        )

Answer 1

不要忘记 DefaultTabController，这段代码工作正常:

         @override
          Widget build(BuildContext context) {
            return DefaultTabController(
              length: 3,
              child: Container(
                  child: CustomScrollView(slivers: <Widget>[
                SliverAppBar(),
                new SliverFillRemaining(
                  child: TabBarView(
                    children: <Widget>[
                      Text("Tab 1"),
                      Text("Tab 2"),
                      Text("Tab 3"),
                    ],
                  ),
                ),
              ])),
            );
          }