将选项卡视图与处于颤动状态的选项卡重叠

Question

我需要实现这样的选项卡：https://i.stack.imgur.com/12iVI.png

我已经做了tabBar使用这个代码我没有得到透明的背景，如所附图片

Column(
children: <Widget>[
Material(
color: Colors.transparent,
child: TabBar(
indicatorSize: TabBarIndicatorSize.label,
unselectedLabelColor: Colors.black,
indicator: UnderlineTabIndicator(
borderSide: BorderSide(width: 2.0, color: Color(0xffD65A32)),
insets: EdgeInsets.symmetric(horizontal: 10.0)),
isScrollable: true,
controller: _tabController,
tabs: [
Tab(
child: Text("Maps", style: tabStyle),
),
Tab(
child: Text("Sections", style: tabStyle),
),
Tab(
child: Text("Events", style: tabStyle),
),
Tab(
child: Text("Gallery", style: tabStyle),
),
Tab(
child: Text("Archives", style: tabStyle),
)
],
),
),
Expanded(
child: TabBarView(
controller: _tabController,
children: [
MyHomePage(),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
],
),
),
],
);

这是我的标签代码

Answer 1

因此，您实际想要的是Stack的行为，而不是Column的行为，因为您希望TabBar位于内容的前面而不是上面。

意思是简单地将Column更改为Stack，并将TabBar推到children阵列的末尾，使其处于最前面。

这是我建议的代码：

@override
Widget build(BuildContext context) {
TabController controller = TabController(
initialIndex: 0,
length: 5,
vsync: this
);
return Stack(
alignment: Alignment.topCenter,
children: <Widget>[
TabBarView(
controller: controller,
children: [
Container(color: Colors.red),
Container(color: Colors.blue),
Container(color: Colors.yellow),
Container(color: Colors.green),
Container(color: Colors.purple),
],
),
Material(
color: Colors.transparent,
child: TabBar(
indicatorSize: TabBarIndicatorSize.label,
unselectedLabelColor: Colors.black,
indicator: UnderlineTabIndicator(
borderSide: BorderSide(width: 2.0, color: Color(0xffD65A32)),
insets: EdgeInsets.symmetric(horizontal: 10.0)),
isScrollable: true,
controller: controller,
tabs: [
Tab(
child: Text("Maps",),
),
Tab(
child: Text("Sections",),
),
Tab(
child: Text("Events",),
),
Tab(
child: Text("Gallery",),
),
Tab(
child: Text("Archives",),
)
],
),
),
],
);
}