使用提供程序 class，此错误不断返回：尝试调用 Provider.of<dynamic>

Question

Error: Tried to call Provider.of<dynamic>.
This is likely a mistake and is therefore
unsupported.

If you want to expose a variable that can be anything, consider changing
`dynamic` to `Object` instead.
'package:provider/src/provider.dart':
Failed assertion: line 307 pos 7: 'T != dynamic'

将它从动态转换为对象是什么意思？

代码：

  body: SingleChildScrollView(
  child: Container(
    width: MediaQuery.of(context).size.width,
    child: Column(
      children: <Widget>[
        FutureBuilder(
          future: Provider.of(context).auth.getCurrentUser(),
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.done) {
              return displayUserInformation(context, snapshot);
            } else {
              return CircularProgressIndicator();
            }

Answer 1

您需要指定 return 静态方法的类型 Provider.of<T>(context)。

此处不能选择动态 ;-)

Flutter 文档中给出的示例不言自明

ChangeNotifierProvider(
      create: (context) => CartModel(),
      child: MyApp(),
    ),

....

Provider.of<CartModel>(context, listen: false).removeAll();

使用提供程序 class，此错误不断返回：尝试调用 Provider.of<dynamic>

This error keeps returning, using the Provider class: Tried to call Provider.of<dynamic>

flutter

class

dart

provider