Question

我正在尝试使用flutter和firebase创建一个登录页面，导航器在所有文件中均正常工作，但是进入此页面时，它在导航器上下文中显示错误错误是
'参数类型'Context'不能分配给参数类型'BuildContext'。以下是我的flutter版本的详细信息：版本：1.0.0 + 1

环境： sdk：“> = 2.1.0 <3.0.0”

依赖关系：扑： sdk：颤动弯曲的导航栏：^ 0.3.2 oktoast： firebase_auth：^ 0.5.20 请帮助我解决这个问题

 import 'package:path/path.dart';
    import 'package:codej/effects.dart';
    import 'package:flutter/material.dart';
    import 'package:oktoast/oktoast.dart';
    import 'package:firebase_auth/firebase_auth.dart';

    class Auth extends StatefulWidget {
      @override
    _AuthState createState() => new _AuthState();
    }

    class _AuthState extends State<Auth>{

    String _email, _password;
    final GlobalKey<FormState> formkey = GlobalKey<FormState>();
      Widget build(BuildContext context) {
        // TODO: implement build
        return Scaffold(appBar: AppBar(
          title: Text("Authentication"),
        ),
        // TODO: implement build
    body: Form(
      key: formkey,
      child: Column(
        children: <Widget>[
    TextFormField(
      validator: (input){
        if(input.isEmpty){
          showToastWidget(Text("please enter your user name"));
        }
      },
      onSaved: (input) => _email = input,
      decoration: InputDecoration(
        labelText: 'Email'
      ),
    ),
    TextFormField(
      validator: (input){
        if(input.length < 6){
          showToastWidget(Text("please enter your password atleast 6 characters"));
        }
      },
      onSaved: (input) => _password = input,
      decoration: InputDecoration(
        labelText: 'Password'
      ),
      obscureText: true,
    ),
    RaisedButton(onPressed: (){

    },
    child: Text("Sign in"),)
        ],
      )),
        );
      }
      void signinAuth() async{
        final formState = formkey.currentState;
        if(formState.validate()){
        formState.save();
        try{
     FirebaseUser user = await FirebaseAuth.instance.signInWithEmailAndPassword(email: _email, password: _password);
      Navigator.push(context, MaterialPageRoute(builder: (context) => BottomNav())); //BottomNav loacted in other file  
        }catch(e){
          print(e.message);
        }

        }

      }
    }

Answer 1

这在我的PC上有效，因此是版本问题。尝试更新您的flutter和dart sdk，如果这不是您的解决方案，只需将BuildContext传递给您的signinAuth这样

void signinAuth(BuildContext context) async {
    final formState = formkey.currentState;
    if (formState.validate()) {
      formState.save();
      try {
        FirebaseUser user = await FirebaseAuth.instance
            .signInWithEmailAndPassword(email: _email, password: _password);
        Navigator.push(
            context,
            MaterialPageRoute(
                builder: (context) =>
                    BottomNav())); //BottomNav loacted in other file
      } catch (e) {
        print(e.message);
      }
    }
  }

无法将参数类型“上下文”分配给参数类型“ BuildContext”

1 个答案: