Ben*_*esi 7 firebase flutter google-cloud-firestore
有人可以帮我吗？我尝试使用 Flutter 构建一个基于 Google Firebase Auth 和 Cloud Firestore 的 Web 应用程序。Android 上的项目运行良好，我可以与用户合作并可以从我的 Cloud Firestore 数据库中获取数据。我制作了第二个应用程序 (webapp) 执行 Firebase 文档中描述的所有步骤（webapp 已注册，托管在 Firebase 上），在 pubspec.yaml 中插入所有依赖项
dependencies:
flutter:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.3
firebase_core: ^0.4.4+3
firebase: ^7.3.0
firebase_auth: ^0.16.0
像这样修改了 index.html：
<body>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="/__/firebase/7.14.3/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="/__/firebase/7.14.3/firebase-analytics.js"></script>
<!-- Add Firebase products that you want to use -->
<script src="https://www.gstatic.com/firebasejs/7.14.2/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.14.2/firebase-firestore.js"></script>
<!-- Initialize Firebase -->
<script src="/__/firebase/init.js"></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>
var firebaseConfig = {
apiKey: "XXXXXXXXXX-6EL5qIBxWjurRQMcK3pf9W-o",
authDomain: "xxxxxxxx.firebaseapp.com",
databaseURL: "https://xxxxxxxx.firebaseio.com",
projectId: "xxxxxxxx",
storageBucket: "xxxxxxxx.appspot.com",
messagingSenderId: "xxxxxxxx6198",
appId: "1:xxxxxxxx16198:web:cde3457e8dc734d045d227",
measurementId: "X-XXXXXXXXXX"
};
firebase.initializeApp(firebaseConfig);
firebase.auth();
firebase.analytics();
</script>
<script src="main.dart.js" type="application/javascript"></script>
</body>
但是当我尝试登录或注册时，Android Studio 会抛出此错误消息：
TypeError: Cannot read property 'app' of undefined
at Object.app$ [as app] (http://localhost:53262/packages/firebase/src/top_level.dart.lib.js:72:56)
at firebase_auth_web.FirebaseAuthWeb.new.[_getAuth] (http://localhost:53262/packages/firebase_auth_web/firebase_auth_web.dart.lib.js:42:27)
at firebase_auth_web.FirebaseAuthWeb.new.signInWithCredential (http://localhost:53262/packages/firebase_auth_web/firebase_auth_web.dart.lib.js:197:34)
at signInWithCredential.next (<anonymous>)
at runBody (http://localhost:53262/dart_sdk.js:43135:34)
at Object._async [as async] (http://localhost:53262/dart_sdk.js:43163:7)
at firebase_auth_web.FirebaseAuthWeb.new.signInWithCredential (http://localhost:53262/packages/firebase_auth_web/firebase_auth_web.dart.lib.js:196:20)
at firebase_auth.FirebaseAuth.__.signInWithCredential (http://localhost:53262/packages/firebase_auth/firebase_auth.dart.lib.js:324:90)
at signInWithCredential.next (<anonymous>)
这个异常是什么意思？我怎么了？非常感谢您的帮助！
Fra*_*sco 10
我有同样的问题，浪费了很多时间。至少对我来说这个问题的主要原因是cloud_firestore依赖。对我来说，事实证明这只是 Firebase 安全方面的一些问题，因为我使用 VPN 访问互联网，而通常弹出的 chrome 调试浏览器不允许安装扩展程序。对我来说一切都很好，但我只是被阻止访问一些 firebase 的东西。要尝试是否是这种情况，请运行flutter run -d chrome --release并复制 localhost url 并将其粘贴到普通浏览器而不是弹出窗口中。如果一切正常，那么您和我遇到了同样的问题，如果没有，那么您可能遇到了不同的问题。希望这可以节省某人的时间。
请记住，您的index.html文件应该正确配置，还应该包括您对 pubspec.yaml 的每个 firebase 依赖项。下面是一个配置良好的例子index.html，只有 body 标签：
<body id="app-container">
// firebase-app.js should go first.
<script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.20.0/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: "xxxxxxxxxxxxx",
authDomain: "xxxxxx.firebaseapp.com",
databaseURL: "https://xxxxxx.firebaseio.com",
projectId: "xxxxx",
storageBucket: "xxxxx.appspot.com",
messagingSenderId: "xxxxxxx",
appId: "1:xxxxxxxxx:web:xxxxxxxxxx",
measurementId: "G-NYEW95QM"
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
firebase.analytics();
</script>
<script src="main.dart.js" type="application/javascript"></script>
</body>
我的pubspec.yaml文件如下所示：
cupertino_icons: ^1.0.0
firebase_auth: ^0.18.2
cloud_firestore: ^0.14.2
provider: ^4.3.2+2
flutter_spinkit: ^4.1.2+1
simple_animations: ^2.2.3
firebase_core: ^0.5.1
intl: ^0.16.1
folding_cell: ^1.0.0
charts_flutter: ^0.9.0
flip_card: ^0.4.4
progress_dialog: ^1.2.4
image_picker_web: ^0.1.0+2
url_launcher: ^5.7.8
image: ^2.1.18
animator: ^2.0.1
timeago: ^2.0.28
uuid: ^2.2.2
font_awesome_flutter: ^8.10.0
bubble: ^1.1.9+1
google_fonts: ^1.1.1
您需要修复依赖关系。
dependencies:
flutter:
sdk: flutter
firebase_auth:
firebase_auth_web:
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