Sliver appbar 不拉伸颤动

Question

我很困惑为什么当我到达顶部列表时我的 sliverappbar 不拉伸和缩放。我在关注 flutter 视频

我尝试了以下代码

class AppBar5 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          SliverAppBar(
            title: Text("title"),
            expandedHeight: 200,
            stretch: true,

            flexibleSpace: FlexibleSpaceBar(
              background: Container(
                  width: MediaQuery.of(context).size.width,
                  height: 200,
                  child: Image.asset("assets/images/hot.jpg", fit: BoxFit.cover)
              ),
            )
          ),
          SliverList(
            delegate: SliverChildBuilderDelegate(
                  (_, index) => ListTile(
                title: Text("Index: $index"),
              ),
            ),
          )
        ],
      ),
    );
  }
}

Answer 1

将 Bouncing ScrollPhysics 添加到 CustomScrollView

CustomScrollView( 
      physics: BouncingScrollPhysics(),
      ...
),

Sliver appbar 不拉伸颤动

Sliver appbar not stretching flutter

flutter

flutter-sliver

flutter-sliverappbar