Question

我让一切正常，包括使用Javascript SDK登录。当用户第一次访问我的应用程序时，他们将单击登录以获取初始令牌并授权offline_access。

我需要的是，当该用户返回时，它（在控制器中）会自动将它们登录到FB，以便我可以再次访问他们的帐户，而无需单击“登录到FB”按钮。

谢谢！

Answer 1

您需要使用Facebook Javascript SDK执行此操作。在页面加载时调用方法'getLoginStatus'，您可以确定用户是否已授权您的应用程序。请参阅：https://developers.facebook.com/docs/reference/javascript/FB.getLoginStatus/

FB.getLoginStatus(function(response) {
  if (response.status === 'connected') {
    // the user is logged in and has authenticated your
    // app, and response.authResponse supplies
    // the user's ID, a valid access token, a signed
    // request, and the time the access token 
    // and signed request each expire
    var uid = response.authResponse.userID;
    var accessToken = response.authResponse.accessToken;
  } else if (response.status === 'not_authorized') {
    // the user is logged in to Facebook, 
    // but has not authenticated your app
  } else {
    // the user isn't logged in to Facebook.
  }
 });

如果用户已经授权离线访问，则自动登录

1 个答案: