Javascript 使用JS变量将Facebook应用程序共享到墙

我有：

$.post( "https://host.com/save.php", {
    'fb_id': userID,
    'meth': 'get_db_ID'
}, function(data) {

    link_id = data;
    console.log('from method' + link_id);
});

FB.ui({
    method: 'feed',
    name: 'My title for a link.',
    caption: ' ',
    description: 'My description',
    link: 'https://www.facebook.com/pages/Page-Test/1417010325197563?id=1417010325197563&sk=app_1413297985570561&app_data=u_id|'+link_id,
    picture: 'http://host.com/myimage.png'
}, 
function(response) {
    console.log('publishStory response: ', response);
});

---

但是我之前定义并分配了用户id的var

link\u id不显示。
这是由异步事件引起的问题。link_id是在$.post的回调函数中设置的。此回调函数仅在POST请求完成后运行-这可能需要几秒钟，具体取决于连接。但是，$.post后面的代码会立即运行，这意味着在调用FB.ui时不会设置link_id。请尝试以下方法：

$.post( "https://host.com/save.php", {
    'fb_id': userID,
    'meth': 'get_db_ID'
}, function(data) {

    link_id = data;
    console.log('from method' + link_id);

    FB.ui({
        method: 'feed',
        name: 'My title for a link.',
        caption: ' ',
        description: 'My description',
        link: 'https://www.facebook.com/pages/Page-Test/1417010325197563?id=1417010325197563&sk=app_1413297985570561&app_data=u_id|'+link_id,
        picture: 'http://host.com/myimage.png'
    }, 
    function(response) {
        console.log('publishStory response: ', response);
    });
});