setState不更新StateFul Widget

Question

我的代码有问题。我试图通过将setState的函数设置为父函数来更新子部件，然后在单击按钮后从无状态小部件中启动它。看起来就像

主(状态) ->父(无状态)在TextField输入更改->子(状态)时触发TextField

这是代码

Function stateGoldTotalBox = (){}; //storing the setState function here
class BuildGoldTotalBox extends StatefulWidget {
  final String type;
  BuildGoldTotalBox({required this.type});

  @override
  State<BuildGoldTotalBox> createState() => _BuildGoldTotalBoxState();
}

class _BuildGoldTotalBoxState extends State<BuildGoldTotalBox> {
  int _amount = 0;
  Map language = globals.language;
  Future<bool> _updateState({required int amount}) async{
    if(this.mounted) {
      setState(() {
        _amount = amount;
        print('fired'); //this on is working fine
      });
    }
    return true;
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    stateGoldTotalBox = _updateState;
  }

  @override
  Widget build(BuildContext context) {
    print(_amount); //this also working to check if setState working
    return Container(
      decoration: BoxDecoration(
        border: Border.all(color: Colors.grey,width: 0.5),
      ),
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(language['total'].toString().toCapitalized()),
            Text(_amount.toStringAsFixed(2)), //THIS ONE DOES NOT CHANGE
            SvgPicture.asset('lib/assets/currency/money.svg',height: 20.0,),
          ],
        ),
      ),
    );
  }
}

Answer 1

尝试使用get插件，https://pub.dev/packages/get，您可以使用它更新无状态小部件。