Flutter 现有项目到 WebApp + Firebase (Firestore + Hosting)

Question

我有一个使用 Firestore 的现有 Flutter 应用程序（运行s 在 Android/IOS 上正确）。

目标：

我想先让它支持网页
我想在 Firebase 主机上托管它

目前的结果：

在本地运行ning时，空白页
当部署到 firebase 时，似乎运行 index.html

我试过的

根据this教程：

a) 在我的 firebase 项目上添加了一个 Web 应用程序

b) npm install -g firebase-tools

c) firebase login

d) firebase init

==> 我 select Firestore 和托管

==>使用现有项目，select我的项目

==> 使用所有默认设置（public 目录的 build/web 文件夹除外）

e) flutter channel dev flutter upgrade flutter config --enable-web

f) flutter create .

g) flutter build web

h) 然后我将所有内容从 build/web 复制到 /web 文件夹，在正文底部添加来自 firebase 的 CDN，然后按以下方式调用 Firebase JS SDKs :

错误

我在运行在 chrome 上进行本地访问时出现此错误：

(index):53 Uncaught ReferenceError: firebase is not defined

至于使用firebase deploy，页面说我成功设置主机但没有显示index.html

供参考：

    <!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="kidz_happy_pawn">
    <link rel="apple-touch-icon" href="icons/Icon-192.png">

    <!-- Favicon -->
    <link rel="shortcut icon" type="image/png" href="favicon.png"/>

    <title>kidz_happy_pawn</title>
    <link rel="manifest" href="manifest.json">
    <script src='https://cdn.firebase.com/js/client/2.2.1/firebase.js'></script>
    <script src='https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js'></script>
    <link rel='stylesheet' type='text/css' href='/resources/tutorial/css/example.css'>
</head>
<body>

<div id="message">
    <h2>Welcome</h2>
    <h1>Firebase Hosting Setup Complete</h1>
    <p>You're seeing this because you've successfully setup Firebase Hosting. Now it's time to go
        build something extraordinary!</p>
</div>

<script src="https://www.gstatic.com/firebasejs/7.5.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.5.0/firebase-firestore.js"></script>
<script>
  var firebaseConfig = {
    apiKey: "xxx-from-firebase",
    authDomain: "xxx-from-firebase",
    databaseURL: "xxx-from-firebase",
    projectId: "xxx-from-firebase",
    storageBucket: "xxx-from-firebase",
    messagingSenderId: "xxx-from-firebase",
    appId: "xxx-from-firebase",
    measurementId: "xxx-from-firebase"
  };
  firebase.initializeApp(firebaseConfig);
  firebase.analytics();

</script>

<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>

Answer 1

取决于您如何设置您的 firebase apis.from flutter fire 以下是您应该如何设置它。在您的应用程序目录中，编辑 web/index.html 以添加以下内容： `

<body>
    <script src="https://www.gstatic.com/firebasejs/7.5.0/firebase-app.js"></script>
    <script src="https://www.gstatic.com/firebasejs/7.5.0/firebase-firestore.js"></script>
     <!-- ADD THIS BEFORE YOUR main.dart.js SCRIPT -->

var firebaseConfig = {
  apiKey: "",
  authDomain: "[YOUR_PROJECT].firebaseapp.com",
  databaseURL: "https://[YOUR_PROJECT].firebaseio.com",
  projectId: "[YOUR_PROJECT]",
  storageBucket: "[YOUR_PROJECT].appspot.com",
  messagingSenderId: "",
  appId: "1:...:web:",
  measurementId: ""
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);

`

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