Flutter之CustomScrollView

class CustomScrollViewWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          SliverAppBar(
            pinned: true,
            expandedHeight: 200.0,
            flexibleSpace: FlexibleSpaceBar(
              title: Text('Demo'),
            ),
          ),
          SliverToBoxAdapter(
            child: Container(
              alignment: Alignment(0.0, 0.0),
              height: 100,
              color: Colors.yellow,
              child: Text('Container'),
            ),
          ),
          SliverGrid(
            gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
              maxCrossAxisExtent: 200.0,
              mainAxisSpacing: 10.0,
              crossAxisSpacing: 10.0,
              childAspectRatio: 4.0,
            ),
            delegate: SliverChildBuilderDelegate(
              (BuildContext context, int index) {
                return Container(
                  alignment: Alignment.center,
                  color: Colors.teal[100 * (index % 9)],
                  child: Text('grid item $index'),
                );
              },
              childCount: 10,
            ),
          ),
          SliverFixedExtentList(
            itemExtent: 50.0,
            delegate:
                SliverChildBuilderDelegate((BuildContext context, int index) {
              return Container(
                alignment: Alignment.center,
                color: Colors.lightBlue[100 * (index % 0)],
                child: Text('list item $index'),
              );
            }),
          ),
        ],
      ),
    );
  }
}