无法通过使用Navigator.Push（）登录电子邮件和密码访问Flutter[副本]中的其他窗口

Question

我想从登录到家庭窗口访问，但当我尝试用现有帐户登录时，按钮不工作，窗口保持不变。

import 'package:finalproject/Pages/home.dart';
import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';

class LoginPage extends StatefulWidget {
  @override
  _LoginPageState createState() => new _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  String _email, _password; 

 @override
 Widget build(BuildContext context) {
return new Scaffold(
  appBar: new AppBar(
    title: Text('Sign in'),
  ),
  body: Form(
    key: _formKey, 
    child: Column(
      children: <Widget>[

        TextFormField(
          validator: (input) {
            if (input.isEmpty) {
              return '  Write your email';
            }
            return null;
          },
          onSaved: (input) => _email = input,
          decoration: InputDecoration(labelText: '  Email'),
        ),

        TextFormField(
          validator: (input) {
            if (input.length < 6) {
              return '  Write your password';
            }
            return null;
          },
          onSaved: (input) => _password = input,
          decoration: InputDecoration(labelText: '  Password'),
          obscureText: true,
        ),

        RaisedButton(
          onPressed: signIn,
          child: Text('Sign in'),
        ),],),),);}


void signIn() async {

if (_formKey.currentState.validate()) {
  _formKey.currentState.save();
  try {
    // ignore: deprecated_member_use
    UserCredential authResult = await FirebaseAuth.instance
        .signInWithEmailAndPassword(email: _email, password: _password);
    final User user = authResult.user;

    Navigator.push(
      context,
      MaterialPageRoute(builder: (context) => Home()),
    );
  } catch (e) {
    print(e.message);
  }}}}

而且，我总是在按下签到按钮后收到这条消息。

I/flutter（3130）：未创建Firebase应用程序“[DEFAULT]”-调用Firebase.InitializeApp（）

也许这就是原因？

Answer 1

您需要初始化FireBaseApp。您可以在您的主要功能中这样做：

void main() async {
 
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
   
  runApp(MyApp());
}