在此 Anasayfa 小部件上方找不到正确的提供者<MQTTAppState>

Question

Widget build(BuildContext context) {
    ChangeNotifierProvider<MQTTAppState>(
        create: (_) => MQTTAppState(),
        child:MQTTView(),);
    return MaterialApp(
      title: 'Zenittek Ltd.',

      theme: ThemeData(
        scaffoldBackgroundColor: Colors.lightBlue,
        primaryColor: Colors.blueAccent,
        primarySwatch: Colors.blue,
      ),
        home: Anasayfa(),
        );

您好，请问如何转发子页面给供应商？