facebook API如何调用onlogin

// 初始化 Facebook SDK
window.fbAsyncInit = function() {
  FB.init({
    appId      : '{your-app-id}',
    cookie     : true,
    xfbml      : true,
    version    : '{api-version}'
  });

  // 监听 onlogin 事件
  FB.Event.subscribe('auth.login', function(response) {
    // 在这里执行你的操作
    console.log('User logged in:', response);
  });
};

// 加载 Facebook SDK
(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 = "https://connect.facebook.net/en_US/sdk.js";
 fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));