Flutter 在flatter中使用提供者依赖

我正在尝试与Flatter中的提供商合作，但我不断遇到以下错误：

The following ProviderNotFoundException was thrown building Login(dirty, state: _LoginState#42a76):
I/flutter ( 8335): Error: Could not find the correct Provider<CRUDModel> above this Login Widget
I/flutter ( 8335): 
I/flutter ( 8335): To fix, please:
I/flutter ( 8335): 
I/flutter ( 8335):   * Ensure the Provider<CRUDModel> is an ancestor to this Login Widget
I/flutter ( 8335):   * Provide types to Provider<CRUDModel>
I/flutter ( 8335):   * Provide types to Consumer<CRUDModel>
I/flutter ( 8335):   * Provide types to Provider.of<CRUDModel>()
I/flutter ( 8335):   * Ensure the correct `context` is being used.
I/flutter ( 8335): 
I/flutter ( 8335): If none of these solutions work, please file a bug at:
I/flutter ( 8335): https://github.com/rrousselGit/provider/issues

我不知道到底是什么问题。 我的应用程序中有一个启动屏幕，这使我无法在主类中添加提供商，因此我将其移动到我的滑动页面：该类包含登录和注册按钮这是我添加提供商的地方 这是我的滑杆课

class _SliderScreenState extends State<SliderScreen>{
  int _current = 0;
  List<SliderModel> sliderList = []...;

  @override
  Widget build(BuildContext context) {
    final CarouselSlider coverScreenExample = CarouselSlider(... );

    return
      Scaffold(
          backgroundColor: Color(0xffE5E5E5),
          body:
          Column(
            children: <Widget>[
              Expanded(
                flex: 1,
                child: coverScreenExample,
              ),
              Padding(
                padding: EdgeInsets.only(left: 34, right: 34,bottom: 100),
                child: Row(
                  children: <Widget>[
                    Expanded(
                        flex:1,
                        child:   CustomButton(
                            text:'Login',
                            textColor:accentColor,
                            fillColor: Colors.white,
                            height: 49,
                            function: (){
                              Navigator.pushReplacement(context,MaterialPageRoute(
                                  builder: (context){
                                    return  **Provider<CRUDModel>.value(
                                      value: CRUDModel(),
                                      child:** Login() ,
                                    );
                                  }
                              ));
                              // Navigator.pushNamed(context, '/login');
                            }
                        )
                    ),
                    SizedBox(width: 61,),
                    Expanded(
                        flex: 1,
                        child: CustomButton(
                            text:'Register',
                            textColor: Colors.white,
                            height: 49,
                            fillColor:accentColor,
                            function: (){
                              Navigator.pushReplacement(context, MaterialPageRoute(builder: (context)=>Registeration()));
                            })
                    ),

                  ],
                )   ,) ,
            ],
          )

      );
  }

  List<T> map<T>(List list, Function handler) {
    List<T> result = [];
    for (var i = 0; i < list.length; i++) {
      result.add(handler(i, list[i]));
    }
    return result;
  }
}

问题是，每当我点击登录按钮时，我都会在屏幕和日志上看到上面显示的错误消息，但是如果我热加载错误页面，我会看到我的登录屏幕

这是我的CRUDModel课程

class CRUDModel extends ChangeNotifier{

  API _api = locator<API>();

  Future signUp( BuildContext context, SignUpModel data) async{
    var result ;
    _api.path= (BASE_URL+"signup");
    Response v = await _api.postDetails(data.toJson());

    final responseJson = json.decode(v.body);
    final int statusCode =responseJson.statusCode;

    if(statusCode < 200 || statusCode > 400 ||json == null){
      result = throw new Exception("SignUP:: Error while fetching data");
    }
    else if(statusCode == 200){
      result = SignUpModel.fromJson(json.decode(responseJson));
      Navigator.push(context, MaterialPageRoute(builder: (context)=> Login()));
    }
    return result;
  }

  Future login( BuildContext context, LoginModel data) async{
    var result ;
    _api.path = BASE_URL+"login";
    Response v = await _api.postDetails(data.toJson());

    final responseJson = json.decode(v.body);
    final int statusCode =responseJson.statusCode;

    if(statusCode < 200 || statusCode > 400 ||json == null){
      result = throw new Exception("SignUP:: Error while fetching data");
    }
    else if(statusCode == 200){
      result = SignUpModel.fromJson(json.decode(responseJson));
      Navigator.push(context, MaterialPageRoute(builder: (context)=> HomePage()));
    }
    return result;
  }

}

我做错了什么？

不使用此选项：

Navigator.pushReplacement(context,MaterialPageRoute(
  builder: (context){
    return Provider<CRUDModel>.value(
      value: CRUDModel(),
      child: Login() ,
    );
  }
));

如果你想在你的登录中使用你的提供者，你可以使用Consumer，或者你可以这样称呼它

final crudModelProvider = Provider.of<CrudModel>(context); 

---

我已经这样做了，但仍然会遇到同样的错误。我必须清理我的代码，但我再也看不到那个错误了。谢谢Selim Kundakıoğlu

final crudModelProvider = Provider.of<CrudModel>(context);