Flutter Web：MissingPluginException（在频道 plugins.flutter.io/firebase_auth 上找不到方法 startListeningAuthState 的实现）
[英]Flutter Web: MissingPluginException(No implementation found for method startListeningAuthState on channel plugins.flutter.io/firebase_auth)
问题描述
I recently converted my Flutter Firebase app to to Flutter Web and I'm getting this error after trying to sign in or register:
我最近将我的 Flutter Firebase 应用程序转换为 Flutter Web 并在尝试登录或注册后收到此错误：
MissingPluginException(No implementation found for method startListeningAuthState on channel plugins.flutter.io/firebase_auth)
I added new web app to my Firebase project, pasted the code and it doesn't seem to work.我在 Firebase 项目中添加了新的网络应用程序，粘贴了代码，但它似乎不起作用。 Any solutions?任何解决方案？ I would like to keep my code as much the same as it can, but i will apreciate every answer.我想尽可能保持我的代码相同，但我会感谢每个答案。 Thanks!谢谢！ My index.html:我的 index.html：
<body> <!-- The core Firebase JS SDK is always required and must be listed first --> <script src="https://www.gstatic.com/firebasejs/7.21.1/firebase-app.js"></script> <!-- TODO: Add SDKs for Firebase products that you want to use https://firebase.google.com/docs/web/setup#available-libraries --> <script src="https://www.gstatic.com/firebasejs/7.21.1/firebase-analytics.js"></script> <script src="https://www.gstatic.com/firebasejs/7.21.1/firebase-auth.js"></script> <script src="https://www.gstatic.com/firebasejs/7.21.1/firebase-firestore.js"></script> <script> // Your web app's Firebase configuration // For Firebase JS SDK v7.20.0 and later, measurementId is optional var firebaseConfig = { apiKey: "**", authDomain: "***", databaseURL: "h****", projectId: "%%%", storageBucket: "%%%%", messagingSenderId: "%%%%", appId: "%%%%", measurementId: "%%%%" }; // Initialize Firebase if(!firebase.apps.length){ firebase.initializeApp(firebaseConfig); firebase.analytics(); firebase.auth(); firebase.firestore(); }; </script> <!-- This script installs service_worker.js to provide PWA functionality to application. For more information, see: https://developers.google.com/web/fundamentals/primers/service-workers --> <script> if ('serviceWorker' in navigator) { window.addEventListener('load', function () { navigator.serviceWorker.register('flutter_service_worker.js'); }); } </script> <script src="main.dart.js" type="application/javascript"></script> </body> My pubspec.yaml:我的 pubspec.yaml：
dependencies: flutter: sdk: flutter firebase_auth: ^0.14.0+5 cloud_firestore: ^0.12.9+4 firebase_core: ^0.4.4+3 firebase_storage: 3.0.4 provider: ^3.1.0 image_cropper: ^1.2.0 image_picker: ^0.6.5 outline_gradient_button: ^1.0.0+2 page_transition: ^1.1.6 share: ^0.6.4+3 intl: ^0.16.1 photo_view: ^0.10.2 skeleton_text: ^1.0.0 url_launcher: ^5.4.5 admob_flutter: ^0.3.4 file_picker: ^2.0.0 flutter_downloader: ^1.5.0 path_provider: ^1.6.18 permission_handler: ^5.0.1+1 ext_storage: ^1.0.3 connectivity: ^0.4.9+3
My auth.dart:我的 auth.dart：
import 'package:classy/pages/blank.dart'; import 'package:flutter/material.dart'; import 'package:firebase_auth/firebase_auth.dart'; import 'package:flutter/services.dart'; import 'user.dart'; class AuthService { String exceptionError; final FirebaseAuth _auth = FirebaseAuth.instance; //Creating user object User userFromFirebaseUser(FirebaseUser user){ return user != null ? User(uid: user.uid) : null; } void currentUser() async{ final FirebaseUser user = await _auth.currentUser(); } //auth change user stream Stream<User> get user{ return _auth.onAuthStateChanged.map((FirebaseUser user) => userFromFirebaseUser(user)); } //Registering with email and password Future register(String email, String password, context) async { try{ AuthResult result = await _auth.createUserWithEmailAndPassword(email: email, password: password); FirebaseUser user = result.user; Navigator.popUntil(context, ModalRoute.withName("/")); // Navigator.pushReplacementNamed(context, '/wrapper'); return userFromFirebaseUser(user); } on PlatformException catch(e){ if(e.message.startsWith('The email address is already in use')){ exceptionError='Użytkownik z podanym adresem email już istnieje'; } if(e.message.startsWith('The email address is badly formatted')){ exceptionError='Wpisz poprawny adres email'; } return null; } } //Logging with email and password Future login(String email, String password, context) async { try{ AuthResult result = await _auth.signInWithEmailAndPassword(email: email, password: password); FirebaseUser user = result.user; Navigator.pop(context); return userFromFirebaseUser(user); } on PlatformException catch(e){ if(e.message.startsWith('The password is invalid')){ exceptionError='Wpisz poprawne hasło'; } if(e.message.startsWith('There is no user record')){ exceptionError='Użytkownik z podanym email nie istnieje'; } return null; } } }
2 个解决方案
解决方案1
0 已采纳 2021-01-08 19:53:02
Update your FireAuth version to firebase_auth: ^0.18.4+1 if during the update of pubspec any other error was presented, update the other dependencies to updated versions.将您的 FireAuth 版本更新为 firebase_auth: ^0.18.4+1 如果在 pubspec 更新期间出现任何其他错误，请将其他依赖项更新为更新版本。
[Resposta em BR] [Resposta em BR]
atualize a versão do seu FireAuth para firebase_auth: ^0.18.4+1 se durante a atualização do pubspec algum outro erro foi apresentado atualize as demais dependências para versões atualizadas. atualize a versão do seu FireAuth para firebase_auth: ^0.18.4+1 se durante a atualização do pubspec algum outro erro foi apresentado atualize as demaisdependentências para versões atualizadas。
解决方案2
0 2021-05-10 15:33:37
What worked for me was to delete/comment out all firebase related dependencies and reinstall one by one using flutter pub add *dependency name*对我有用的是删除/注释掉所有与 firebase 相关的依赖项，然后使用flutter pub add *dependency name*一一重新安装
This ensured I had the latest dependencies installed and there were no conflicts这确保我安装了最新的依赖项并且没有冲突
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