Question

以下是我正在玩的示例代码：

var myRootRef = new Firebase('https://url.firebaseIO.com/');

var authClient = new FirebaseAuthClient(myRootRef, function(error, user) {
    if (error) {
        // an error occurred while attempting login
        console.log(error);
    } else if (user) {
        // user authenticated with Firebase
        console.log('User ID: ' + user.id + ', Provider: ' + user.provider);
    } else {
        // user is logged out

        console.log('logged out!');
        login();
    }
});


function login(){
    var email = "something@gmail.com";
    var password = "123";

    authClient.login('password', {
        email: email,
        password: password,
        rememberMe: true
    });
}

我得到的错误是：无法调用未定义的方法'login'

authClient似乎总是为空？我做错了什么？

Answer 1

此处 authClient 似乎很好。我认为login（）函数的范围有问题。试试这个

    var myRootRef = new Firebase('https://url.firebaseIO.com/');
    var authClient = new FirebaseAuthClient(myRootRef, function(error, user) {
        if (error) {
            // an error occurred while attempting login
            console.log(error);
        } else if (user) {
            // user authenticated with Firebase
            console.log('User ID: ' + user.id + ', Provider: ' + user.provider);
        } else {
            // user is logged out

            console.log('logged out!');

        var email = "something@gmail.com";
        var password = "123";

        this.login('password', {
            email: email,
            password: password,
            rememberMe: true
        });
        }
    });

Answer 2

当您最初调用new FirebaseAuthClient时，它将使用当前登录状态调用回调（例如，当调用此用户时，用户可能已经登录）。此回调发生在new FirebaseAuthClient返回之前，这意味着尚未分配authClient。

您无需在回调中移动authClient.login，但这样可以正常工作。您只需要知道第一次发出此回调可能在分配之前。

例如，您可以在调用周围使用setTimeout来确保首先设置变量：

var authClient = new FirebaseAuthClient(myRootRef, function(error, user) {
    if (error) {
        // an error occurred while attempting login
        console.log(error);
    } else if (user) {
        // user authenticated with Firebase
        console.log('User ID: ' + user.id + ', Provider: ' + user.provider);
    } else {
        // user is logged out
        console.log('not logged in yet or logged out again!');
        setTimeout(login, 1);
    }
});

firebase简单认证authClient是null？

2 个答案: