Flutter 初始化数据完成后再加载页面

@override
void didChangeDependencies() {
//getcplist();
WidgetsBinding.instance.addPostFrameCallback((tim) {
getcplist();
});
super.didChangeDependencies();
}

class CppageState extends State<Cppage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: Consumer<CouponProvider>(builder: (context,CouponProvider cplst,Child) {
return Column(
children: <Widget>[
Container(
padding: EdgeInsets.only(top: 5.0,bottom: ),
child: ShowpayWidget(),),
Expanded(
child:
FutureBuilder(
future: _futureBuilderFuture,
builder: (BuildContext context, AsyncSnapshot snapShot)
{
if (snapShot.connectionState== ConnectionState.waiting)
{
return Center(child: Text('Data is Loading...'),);
} else if (snapShot.connectionState == ConnectionState.done) {
print(snapShot.hasError);
print('data:${snapShot.data}');}
if (snapShot.hasError) {
return Text('Error: ${snapShot.error}');
}
return GridView.builder(
shrinkWrap: true,
itemCount: cplst.couponlst.bfcrmResp.voucherList.length,
// physics: NeverScrollableScrollPhysics(),//禁止滚动
padding: EdgeInsets.symmetric(horizontal: ),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: ,
mainAxisSpacing: ,
crossAxisSpacing: ,
childAspectRatio: ,
),
itemBuilder: (context, index) {
return Cpitem(cplst.couponlst.bfcrmResp.voucherList[index]);
},
);
}
)
)
],
);
// );
})
); } Future getcplist() async
{
print('xxxxxxxxxxx');
await Provider.of<CouponProvider>(context,listen: false).getCouponlist(); } var _futureBuilderFuture;
@override
void initState() {
print('');
_futureBuilderFuture =getcplist();
super.initState();
}