javascript - FB 登录 api 的 checkLoginState 在 Angular Controller 中给出未定义

Question

我正在为 Facebook 登录 api 使用以下代码:-

 function statusChangeCallback(response) {
    console.log('statusChangeCallback');
    console.log(response);
    if (response.status === 'connected') {
        testAPI();
    } else if (response.status === 'not_authorized') {
        document.getElementById('status').innerHTML = 'Please log ' +
            'into this app.';
    } else {
        document.getElementById('status').innerHTML = 'Please log ' +
            'into Facebook.';
    }
};

function checkLoginState() {
    FB.getLoginStatus(function(response) {
        statusChangeCallback(response);
    });
};

window.fbAsyncInit = function() {
    FB.init({
        appId      : '924067597708287',
        cookie     : true,

        xfbml      : true,
        version    : 'v2.5'
    });
    FB.getLoginStatus(function(response) {
        statusChangeCallback(response);
    });
};

(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "//connect.facebook.net/en_US/sdk.js";
    fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));

function testAPI() {
    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function(response) {
        console.log('Successful login for: ' + response.name);
        console.log('Successful login for: ' + response.id);
        console.log('Successful login for: ' + response.picture);
        document.getElementById('status').innerHTML =
            'Thanks for logging in, ' + response.name + '!';
        document.getElementById('pic').innerHTML =
            'Your user id is : ' + response.id + "<br />" +
            "<img src='" + "https://graph.facebook.com/" + response.id + "/picture?type=large' alt='' />";
    });
};

当我在 Angular Controller 中放置相同的代码时，我收到一条错误消息

checkLoginState is not defined

登录过程停止，但当我刷新时，它显示已登录。

请帮忙。

Answer 1

一旦将 checkLoginState 放入 Controller ，它是否超出了 FB(sdk.js)的范围。因此，改为在窗口上定义它(您需要注入(inject) $window)。

    $window.checkLoginState = function() {
      FB.getLoginStatus(function(response) {
        console.log("checkLoginState: "+response);
      });
    }

然后您应该在每次点击后在控制台中看到这一点，这告诉您 FB 可以访问该功能:

checkLoginState: [object Object]