我正在尝试使用 Firebase 身份验证实现一个简单的 Flutter Web 应用程序。
我收到错误 NoSuchMethodError: tried to call a non-function, such as null: 'dart.global.firebase.auth' .
我看过其他帖子，比如"NoSuchMethodError: tried to call a non-function, such as null: 'dart.global.firebase.auth'" when initializing auth() in flutter for web和 Flutter web: tried to call a non-function, such as null: 'dart.global.firebase.storage .
两者都提出了相同的解决方案:将 firebase-auth.js 添加到 index.html .我已经做到了。我的index.html是这样的文件看起来像:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="my_app">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="shortcut icon" type="image/png" href="favicon.png"/>
<title>my_app</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<!-- 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 -->
<!-- Firebase Configuration-->
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/7.15.5/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/7.15.5/firebase-auth.js"></script>
<!-- <script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-analytics.js"></script> -->
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-storage.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-database.js"></script>
<script>
// Your web app's Firebase configuration
var firebaseConfig = {
//my info
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
// firebase.analytics();
</script>
<!-- End of Firebase Configuration-->
<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>
</html>
最佳答案
原来我放了这个
<!-- Firebase Configuration-->
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/7.15.5/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/7.15.5/firebase-auth.js"></script>
<!-- <script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-analytics.js"></script> -->
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-storage.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-database.js"></script>
<script>
// Your web app's Firebase configuration
var firebaseConfig = {
//my info
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
// firebase.analytics();
</script>
<!-- End of Firebase Configuration-->
它应该在
<head> 里面标签。旁注，我有这个
<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase-app.js"></script>两次，所以我删除了下面的一个。最后，感谢 David Iglesias 的回答:https://github.com/FirebaseExtended/flutterfire/issues/2860#issuecomment-651313186 .
关于firebase - Flutter Web 应用程序，Firebase.auth 不起作用。试图调用一个非函数，例如 null。 'dart.global.firebase.auth'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62628843/