我的主页有 SliverPersistentHeader
和 TabBarView
如下代码:
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Theme.of(context).backgroundColor,
body: DefaultTabController(
length: 3,
child: NestedScrollView(
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
return <Widget>[
SliverAppBar(
expandedHeight: 250.0,
floating: false,
pinned: true,
),
SliverPersistentHeader(
delegate: _SliverAppBarDelegate(
TabBar(
labelStyle: TextStyle(
fontFamily: 'Raleway',
fontSize: 17,
fontWeight: FontWeight.w400,
color: Theme.of(context).backgroundColor),
indicatorColor: Theme.of(context).hintColor,
labelColor: Theme.of(context).buttonColor,
unselectedLabelColor: Theme.of(context).dividerColor,
tabs: [
Tab(text: "Menu"),
Tab(text: "About"),
Tab(text: "Contact"),
],
),
),
pinned: true,
),
];
},
body: TabBarView(
children: <Widget>[MenuTab(), AboutTab(), ContactTab()],
),
),
),
);
}
}
class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
_SliverAppBarDelegate(this._tabBar);
final TabBar _tabBar;
@override
double get minExtent => _tabBar.preferredSize.height;
@override
double get maxExtent => _tabBar.preferredSize.height;
@override
Widget build(
BuildContext context, double shrinkOffset, bool overlapsContent) {
return new Container(
child: _tabBar,
);
}
@override
bool shouldRebuild(_SliverAppBarDelegate oldDelegate) {
return false;
}
}
在那之后我有一个单一的类敌人每个选项卡,例如像下面的代码:
class _AboutTabState extends State<AboutTab> {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Theme.of(context).backgroundColor,
body: ListView(
children: <Widget>[
ListView.builder(
shrinkWrap: true,
itemCount: _list.length,
itemBuilder: (BuildContext context, int index) {
final _aboutList = _list[index];
return ExpansionTile(
title: ListTile(
title: Padding(
padding: const EdgeInsets.fromLTRB(5, 0, 0, 0),
child: Text(_aboutList.aboutTitle,
style: TextStyle(
fontFamily: 'Raleway',
fontSize: 16,
fontWeight: FontWeight.w500,
color: Theme.of(context).buttonColor)),
),
),
children: <Widget>[
ListTile(
title: Padding(
padding: const EdgeInsets.fromLTRB(10, 0, 0, 0),
child: Text(_aboutList.content,
style: TextStyle(
fontFamily: 'Raleway',
fontSize: 16,
fontWeight: FontWeight.w400,
color: Theme.of(context).toggleableActiveColor)),
),
)
],
);
},
),
],
));
问题:
当我按照屏幕截图折叠 SliverPersistentHeader 时,我得到了错误的结果。 发送
最佳答案
_SliverAppBarDelegate() 函数正在返回一个容器,您可以像这样在其中添加颜色:
class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
_SliverAppBarDelegate(this._tabBar);
final TabBar _tabBar;
@override
double get minExtent => _tabBar.preferredSize.height;
@override
double get maxExtent => _tabBar.preferredSize.height;
@override
Widget build(
BuildContext context, double shrinkOffset, bool overlapsContent) {
return new Container(
color: Colors.white, // ADD THE COLOR YOU WANT AS BACKGROUND.
child: _tabBar,
);
}
@override
bool shouldRebuild(_SliverAppBarDelegate oldDelegate) {
return false;
}
}
关于listview - Flutter中SliverPersistentHeader和TabBarView如何搭配使用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56339990/