diegoveloper
commented
6 years ago nice observation, can you play with these values?
@override double get minExtent => _tabBar.preferredSize.height; @override double get maxExtent => _tabBar.preferredSize.height;
Maybe there is a padding on one of your widgets or by default. Put some fixed values there.
hi, I want to add a listview widget in tab,but have a space in tab between listview，I want to remove it ,how can i fix it ,thanks my code is:
ScrollController _scrollController = new ScrollController(); @override Widget build(BuildContext context) { return Scaffold( body: NestedScrollView( controller: _scrollController, headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) { return[
SliverAppBar(
expandedHeight: _appBarHeight,
floating: false,
pinned: true,
backgroundColor: FunColors.c_333,
actions: [
new IconButton(
icon: new Icon(Icons.share),
tooltip: "分享话题",
onPressed: () {
showShareBottomSheet(context);
},
)
],
flexibleSpace: FlexibleSpaceBar(
title: Text(widget.topicName,
style: TextStyle(
color: Colors.white,
fontSize: 16.0,
)),
background: new Stack(
fit: StackFit.expand,
children: [
_buildTopicBackground(),
new Align(
alignment: Alignment.bottomRight,
child: new Container(
margin: EdgeInsets.only(bottom: 15.0, right: 15.0),
height: 35.0,
width: 75.0,
child: new RaisedButton(
highlightColor: FunColors.themeColor,
onPressed: () {},
color: FunColors.themeColor,
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(20.0),
),
child: new Text(
"关注",
style: new TextStyle(color: Colors.white),
),
),
),
),
],
),
),
),
SliverPersistentHeader(
delegate: _SliverAppBarDelegate(
_tabController,
),
pinned: true,
),
];
},
body: new TabBarView(
controller: _tabController,
children: [
new TopicDetailChildPage(
TopicDetailPresenter.TYPE_HOT, widget.topicName),
new TopicDetailChildPage(
TopicDetailPresenter.TYPE_NEW, widget.topicName),
],
),
),
);
}
class TopicDetailChildPage extends StatefulWidget { int type = 0; // 0:hot 1:new String topicName;
TopicDetailChildPage(this.type, this.topicName);
@override State createState() {
return new TopicDetailChildState();
}
}
class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate { _SliverAppBarDelegate(this.controller);
final TabController controller;
@override double get minExtent => kToolbarHeight;
@override double get maxExtent => kToolbarHeight;
@override Widget build( BuildContext context, double shrinkOffset, bool overlapsContent) { return new Container( color: Theme.of(context).cardColor, height: kToolbarHeight, child: new TabBar( controller: controller, key: new PageStorageKey(TabBar),
labelColor: Colors.black87,
indicatorColor: FunColors.themeColor,
tabs: [
new Tab(text: '最热'),
new Tab(text: '最新'),
],
),
);
}
@override bool shouldRebuild(_SliverAppBarDelegate oldDelegate) { // return oldDelegate.controller != controller; return false; } }
class TopicDetailChildState extends LoadMoreState<TopicDetailPresenter, TopicDetailChildPage> implements TopicDetailView { List _dataSource = [];
@override void initState() { super.initState(); mPresenter.setType(widget.type); mPresenter.setTopicName(widget.topicName); mPresenter.fetchData(); }
@override Widget build(BuildContext context) { return _buildContent(); }
Widget _buildContent() { if (_dataSource == null || _dataSource.isEmpty) { return showLoading(); } else { return ListView.builder( itemCount: _dataSource.length, itemBuilder: (context, index) { return new PostWidget( _dataSource[index], PostWidget.SOURCE_TYPE_TOPIC); }); } }
@override TopicDetailPresenter newInstance() { return new TopicDetailPresenter(); }
@override void getTopicDetail(TopicBean topicBean) {}
@override void getPosts(List posts) {
if (posts != null && posts.isNotEmpty) {
setState(() {
_dataSource.addAll(posts);
});
}
}
}
