Dart Flutter：Firebase身份验证无需登录即可创建用户

发布于01月29日

我的Flatter应用程序中有一个使用firebase身份验证的用户管理功能.我可以使用firebase_auth的createUserWithEmailAndPassword()功能注册新用户帐户.

return await FirebaseAuth.instance.
    createUserWithEmailAndPassword(email: email, password: password);

The problem is when the registration is successful it automatically authenticates my 100 instance as the new user even though I am already logged in.

我遇到了这样的答案:100，但它是用javascript编写的，并且API稍有不同.

我怎样才能在dart 中做同样的事情呢？

推荐答案

Updated:firebase_core ^0.5.0和firebase_auth ^0.18.0+1已经弃用了一些旧类.

下面是firebase_core ^0.5.1和firebase_auth ^0.18.2的代码更新.

static Future<UserCredential> register(String email, String password) async {
    FirebaseApp app = await Firebase.initializeApp(
        name: 'Secondary', options: Firebase.app().options);
    try {
        UserCredential userCredential = await FirebaseAuth.instanceFor(app: app)
        .createUserWithEmailAndPassword(email: email, password: password);
    }
    on FirebaseAuthException catch (e) {
      // Do something with exception. This try/catch is here to make sure 
      // that even if the user creation fails, app.delete() runs, if is not, 
      // next time Firebase.initializeApp() will fail as the previous one was
      // not deleted.
    }
    
    await app.delete();
    return Future.sync(() => userCredential);
}

Original Answer

我使用Firebase身份验证API进行了试验，我当前的工作解决方案是:

// Deprecated as of `firebase_core ^0.5.0` and `firebase_auth ^0.18.0`.
// Use code above instead.

static Future<FirebaseUser> register(String email, String password) async {
    FirebaseApp app = await FirebaseApp.configure(
        name: 'Secondary', options: await FirebaseApp.instance.options);
    return FirebaseAuth.fromApp(app)
        .createUserWithEmailAndPassword(email: email, password: password);
}

从本质上讲，它需要创建一个FirebaseAuth的新实例，因此从createUserWithEmailAndPassword()自动登录不会影响默认实例.