Question

这是我抛出Uncaught ReferenceError: FB is not defined的代码。如果我删除window.fbAsyncInit方法并在<script src="//connect.facebook.net/en_US/all.js"></script>

中添加<head>，它会同步正常工作

<!doctype html>
<html>
<head>
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
      <script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>

     <script type="text/javascript">

        function login()
        {
            FB.login
            (
                function( response )
                {
                    if ( response.authResponse )
                    {
                        FB.api
                        (
                            "/me",
                            function( response )
                            {
                                document.getElementById( "profile_name" ).innerHTML = response.name;
                                document.getElementById( "list" ).innerHTML = "http://graph.facebook.com/" + response.id + "/friends";
                            }
                        )
                    }
                }
            );
        }

        function getFriends() {
            alert('1');
            FB.api('/me/friends', function(response) {
                //alert('2:'+response.data);
                if(response.data) {
                    $.each(response.data,function(index,friend) {
                        //alert(friend.name + ' has id:' + friend.id);
                        $( "list" ).append = response.name;
                    });
                } else {
                    alert("Error!");
                }
            });
        }

     </script>
</head>
<body>
    <div id="fb-root"></div>

    <script>

        window.fbAsyncInit = function()
        {
            FB.init
            (
                {
                    appId   : "109036532604620",
                    channelUrl:"http://localhost/testsaav/channel.html",
                    status  : true,
                    cookie  : true,
                    oauth   : true
                }
            );

        };

        FB.getLoginStatus(function(response) {
          if (response.status === 'connected') {
            alert('connected');
          } else if (response.status === 'not_authorized') {
            // not_authorized
          } else {
            // not_logged_in
          }
         });

        (function(d, debug){
         var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
         if (d.getElementById(id)) {return;}
         js = d.createElement('script'); js.id = id; js.async = true;
         js.src = "//connect.facebook.net/en_US/all" + (debug ? "/debug" : "") + ".js";
         ref.parentNode.insertBefore(js, ref);
       }(document, /*debug*/ true));
    </script>    
    <a href="javascript:getFriends();">Login</a>
    <img id="profile_pic"/>
    <pre id="list"></pre>
    <div id="profile_name"></div>
</body>
</html>

Answer 1

尝试移动

 FB.getLoginStatus(function(response) {
      if (response.status === 'connected') {
        alert('connected');
      } else if (response.status === 'not_authorized') {
        // not_authorized
      } else {
        // not_logged_in
      }
     });

此代码在FB.init函数之后但在window.fbAsyncInit函数内部，例如

   window.fbAsyncInit = function()
    {
        FB.init
        (
            {
                appId   : "109036532604620",
                channelUrl:"http://localhost/testsaav/channel.html",
                status  : true,
                cookie  : true,
                oauth   : true
            }
        );

      FB.getLoginStatus(function(response) {
      if (response.status === 'connected') {
        alert('connected');
      } else if (response.status === 'not_authorized') {
        // not_authorized
      } else {
        // not_logged_in
      }
     });

    };

您将从https://developers.facebook.com/docs/reference/javascript/处的示例中注意到，您的初始化代码应该在asyncinit方法中的init方法之后才能正常运行。这样可以确保在加载SDK后以正确的顺序调用事物

https://developers.facebook.com/docs/reference/javascript/

facebook JS SDK：异步加载不起作用

1 个答案: