问题描述
import 'package:Flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Flutter Code Sample';
@override
Widget build(BuildContext context) {
return const MaterialApp(
title: _title,home: MyStatelessWidget(),);
}
}
class MyStatelessWidget extends StatelessWidget {
const MyStatelessWidget({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
final List<String> _tabs = <String>['Tab 1','Tab 2'];
return DefaultTabController(
length: _tabs.length,// This is the number of tabs.
child: Scaffold(
body: nestedScrollView(
headerSliverBuilder: (BuildContext context,bool innerBoxIsScrolled) {
return <Widget>[
SliverToBoxAdapter(
child: SizedBox(
height: 250,),SliverOverlapAbsorber(
handle: nestedScrollView.sliverOverlapAbsorberHandleFor(context),sliver: SliverAppBar(
title: const Text('Books'),pinned: true,expandedHeight: 150.0,forceElevated: innerBoxIsScrolled,bottom: TabBar(
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(
key: PageStorageKey<String>(name),slivers: <Widget>[
SliverOverlapInjector(
handle: nestedScrollView.sliverOverlapAbsorberHandleFor(context),SliverPadding(
padding: const EdgeInsets.all(8.0),sliver: SliverFixedExtentList(
itemExtent: 48.0,delegate: SliverChildBuilderDelegate(
(BuildContext context,int index) {
return ListTile(
title: Text('Item $index'),);
},childCount: 30,],);
},);
}).toList(),);
}
}
我遇到了 Flutter 的 nestedScrollView 的滚动行为问题。 当我在 SliverOverlapAbsorber 上方放置一些条子(在本例中为 SliverToBoxAdapter)时,滚动条会在正文开始处瞬间跳跃。 当我删除它时,滚动行为变得很好。 你可以试试上面的代码。 任何帮助将不胜感激!
解决方法
暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!
如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@)