获取facebook应用程序安装时间戳

Question

如何使用JS api获取当前使用的facebook应用的安装时间？

一般来说，我想验证当前在线的用户是新用户，并且还没有注册返回用户。

Answer 1

你可以使用FB.getLoginStatus作为推荐的here，它可以告诉你访问者是否登录了facebook，如果是的话，他们是否已经在你的应用程序中注册了。

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.
  }
 });