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我尝试将上下文传递给第二个小部件树(在函数中),但出现错误:

尝试将 Provider 与 Listenable/Stream (Model2) 的子类型一起使用。这可能是一个错误,因为 Provider 不会在 Model2 更新时自动更新依赖项。相反,请考虑将 Provider 更改为处理更新机制的更具体的实现,例如: - ListenableProvider - ChangeNotifierProvider - ValueListenableProvider - StreamProvider

Future<void> _neverSatisfied({Key key, @required BuildContext context}) async {

final model2 = Provider.of<Model2>(context, listen: false);

  return showDialog<void>(
    context: context,
    barrierDismissible: false, 
    builder: (BuildContext context) {
      return 


    Provider.value(value: model2, child:


AlertDialog(
        title: Text('Rewind and remember'),
        content: SingleChildScrollView(
          child: ListBody(
            children: <Widget>[
              Text('You will never be satisfied.'),
              Text('You\’re like me. I’m never satisfied.'),
            ],
          ),
        ),
        actions: <Widget>[
          FlatButton(
            child: Text('Regret'),
            onPressed: () async {
await model2.getData();

              Navigator.of(context).pop();
            },
          ),
        ],
),
      );
    },
  );
}

相同的第一个小部件StatefulWidget

@override
  Widget build(BuildContext context) {
return ChangeNotifierProxyProvider<Model1, Model2>(
initialBuilder: (_) => Model2(),
  builder: (_, model1, model2) => model2
    ..string = model1.string,
),
  child: Consumer<Model2>(
    builder: (context, model2, _) =>

第二(我从这里传递上下文):

  @override
  Widget buildStep(BuildContext context) {
  Consumer<Model2>(
    builder: (context, model2, _) =>
...

   _neverSatisfied(context: context); //**pass context**
4

1 回答 1

0

而不是Provider.value你应该使用ChangeNotifierProvider.value

于 2019-08-20T19:49:44.327 回答