https://note.com/kitoko552/n/n7da7c55ebab6

note_n7da7c55ebab6_4.dart

Scaffold(
 appBar: AppBar(title: const Text('Books'), elevation: 0.0),
 body: DefaultTabController(
   length: _tabs.length,
   child: NestedScrollView(
     headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
       return <Widget>[
         // TabBarを追加
         SliverPersistentHeader(
           pinned: true,
           delegate: _StickyTabBarDelegate(
             TabBar(
               tabs: _tabs.map((String name) => Tab(text: name)).toList(),
             ),
           ),
         ),
       ];
     },
     body: TabBarView(),
   ),
 ),
);