Offstage 属性
offstage 设置child 是否显示
代码段
@override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
body: Stack(
children: <Widget>[
new Offstage(
offstage: _pageIndex!=0,
child: new Text("1"),
),
new Offstage(
offstage: _pageIndex!=1,
child: new Text("2"),
),
new Offstage(
offstage: _pageIndex!=2,
child: new Text("3"),
),
],
),
bottomNavigationBar: Container(
height: 60,
child: new BottomNavigationBar(
items: [
new BottomNavigationBarItem(
icon:new Icon(Icons.home, size: 24.0),title:new Text("首页",style : new TextStyle(fontSize: 10,))
),
new BottomNavigationBarItem(
icon:new Icon(Icons.group, size: 24.0),title:new Text("社区",style : new TextStyle(fontSize: 10,))
),
new BottomNavigationBarItem(
icon:new Icon(Icons.person, size: 24.0),title:new Text("我的",style : new TextStyle(fontSize: 10,))
),
],
type: BottomNavigationBarType.fixed,
currentIndex: _pageIndex,
onTap: (index) {
setState(() {
_pageIndex = index;
});
},
),
),
);
}
