code：

List _tabs = ["111","dasdsa","dsad"];

@OverRide
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.

return  Material(
  child: Scaffold(
    body: DefaultTabController(
      length: _tabs.length, // This is the number of tabs.
      child: NestedScrollView(
        headerSliverBuilder:
            (BuildContext context, bool innerBoxIsScrolled) {
          // These are the slivers that show up in the "outer" scroll view.
          return <Widget>[
            SliverOverlapAbsorber(
              handle:
              NestedScrollView.sliverOverlapAbsorberHandleFor(context),
              child: SliverSafeArea(
                top: false,
                sliver: SliverAppBar(
                  title: const Text('Books'),

// floating: true,
pinned: true,
expandedHeight: 300,
snap: false,
primary: true,
forceElevated: innerBoxIsScrolled,
bottom: TabBar(
// These are the widgets to put in each tab in the tab bar.
tabs: _tabs.map((String name) => Tab(text: name)).toList(),
),
),
),
),
];
},
body: TabBarView(
children: _tabs.map((String name) {
return SafeArea(
top: false,
bottom: false,
child: Builder(

                builder: (BuildContext context) {
                  return CustomScrollView(

// physics:new ClampingScrollPhysics(),
key: PageStorageKey(name),
slivers: [
SliverOverlapInjector(
handle:
NestedScrollView.sliverOverlapAbsorberHandleFor(
context),
),
SliverPadding(
padding: const EdgeInsets.all(8.0),
sliver: SliverFixedExtentList(
itemExtent: 60.0,
delegate: SliverChildBuilderDelegate(
(BuildContext context, int index) {
// This builder is called for each child.
// In this example, we just number each list item.
return Container(
color: Color((math.Random().nextDouble() *
0xFFFFFF)
.toInt() <<
0)
.withOpacity(1.0));
},
// The childCount of the SliverChildBuilderDelegate
// specifies how many children this inner list
// has. In this example, each tab has a list of
// exactly 30 items, but this is arbitrary.
childCount: 30,
),
),
),
],
);
},
),
);
}).toList(),
),
),
),
),
);

}