上代码，Scaffold 下面 效果如下
appBar: AppBar(
elevation: 0.0,
toolbarOpacity: 0.0,
bottom: PreferredSize( // 自定义bottom里面的widget
preferredSize: Size.fromHeight(ScreenUtil().setHeight(40)),
child: Container(
padding: EdgeInsets.only(
left: ScreenUtil().setSp(20),
right: ScreenUtil().setSp(20)),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Container(
width: ScreenUtil().setWidth(330),
child: TabBar(
// indicator:BoxDecoration(
// border: Border(bottom:BorderSide(width: 0.5,color: Colors.white))
// ), //可自定义选中的边框 颜色样式
controller: _tabController,
unselectedLabelColor: Colors.grey[500],
indicatorColor: Colors.white,
// labelStyle:TextStyle(fontSize: ScreenUtil().setSp(70)),
indicatorSize: TabBarIndicatorSize.label,
indicatorWeight: 2.0,
labelColor: Colors.white,
tabs: <Widget>[
Container(
// decoration: BoxDecoration(
// border: Border.all(width: 1)
// ),
padding: EdgeInsets.only(
bottom: ScreenUtil().setSp(20)),
child: Text(
"111",
style: TextStyle(
fontSize: ScreenUtil().setSp(40)),
)),
Container(
padding: EdgeInsets.only(
bottom: ScreenUtil().setSp(20)),
child: Text(
"222",
style: TextStyle(
fontSize: ScreenUtil().setSp(40)),
)),
]),
),
Expanded(
child: Container(
alignment: Alignment.centerRight,
child: FlatButton.icon(
icon: Icon(
Icons.info,
color: Colors.white,
size: ScreenUtil().setSp(40),
),
label: Text(
"详情",
style: TextStyle(color: Colors.white),
),
onPressed: () => showModalBottomSheet(
context: context,
builder: (context) {
return _showNomalWid(context);
})),
))
],
),
))),
