我试图在 facebook javascript sdk 中显示签入的标签，但只显示 [object Object] 因为它是一个数组，我尝试了几种方法来显示这个数组，但不能。
以下代码：
<!DOCTYPE html>
<html xmlns:fb="https://www.facebook.com/2008/fbml">
<head>
<title>New JavaScript SDK</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
window.fbAsyncInit = function() {
FB.init({
appId: '274371602680881',
status: true,
cookie: true,
xfbml: true,
oauth: true
});
function updateButton(response) {
var button = document.getElementById('fb-auth');
if (response.authResponse) {
//user is already logged in and connected
var userInfo = document.getElementById('user-info');
FB.api('/me', function(response) {
userInfo.innerHTML = '<img src="https://graph.facebook.com/' + response.id + '/picture">' + response.name;
button.innerHTML = 'Uninstall';
FB.api('/me/checkins', function(response) {
console.log('Got your check-ins: ', response);
if (!response.error) {
//displayCheckIns(response.data, document.getElementById('checkins'));
var markup = '<div class="data-header">Your last five check-ins:</div>';
for (var i=0; i < response.data.length && i < 5; i++) {
var checkin = response.data[i];
//alert(checkin.tags);
//alert(checkin.tags.length);
//alert(checkin.tags.name);
//alert(checkin.tags[0]);
//alert(checkin.tags[0].name);
markup += '<div class="place">'
+ '<div class="picture">Foto: <img src="http://graph.facebook.com/' + checkin.place.id + '/picture"></div>'
+ '<div class="info">'
+ '<div class="from">From: ' + checkin.from.name + '</div>'
+ '<div class="tags">Tags: ' + checkin.tags + '</div>'
+ '<div class="place">Place: ' + checkin.place.name + '</div>'
+ '<div class="place-location">Place Location: ' + checkin.place.location.latitude + ", " + checkin.place.location.longitude + '</div>'
+ '<div class="application">Application: ' + checkin.application.name + '</div>'
+ '<div class="created_time">Created time: ' + checkin.created_time + '</div>'
+ '<div class="likes">Likes: ' + checkin.likes + '</div>'
+ '<div class="check-in-msg">Mensagem: ' + (checkin.message || '') + '</div>'
+ '<div class="comments">Comments: ' + checkin.comments + '</div>'
+ '</div>'
+ '</div>';
}
document.getElementById('user-checkins').innerHTML = markup;
}
});
});
button.onclick = function() {
FB.api({
method: 'auth.revokeAuthorization'
}, function(response) {
window.location.reload();
});
/*
FB.logout(function(response) {
var userInfo = document.getElementById('user-info');
userInfo.innerHTML="";
});*/
};
} else {
//user is not connected to your app or logged out
button.innerHTML = 'Login';
button.onclick = function() {
FB.login(function(response) {
if (response.authResponse) {
FB.api('/me', function(response) {
var userInfo = document.getElementById('user-info');
userInfo.innerHTML = '<img src="https://graph.facebook.com/' + response.id + '/picture" style="margin-right:5px"/>' + response.name;
});
} else {
//user cancelled login or did not grant authorization
}
}, {
scope:'user_status'
});
}
}
}
// run once with current status and whenever the status changes
FB.getLoginStatus(updateButton);
FB.Event.subscribe('auth.statusChange', updateButton);
};
(function() {
var e = document.createElement('script'); e.async = true;
e.src = document.location.protocol
+ '//connect.facebook.net/en_US/all.js';
document.getElementById('fb-root').appendChild(e);
}());
});
</script>
</head>
<body>
<div id="fb-root"></div>
<h2>Updated JS SDK example</h2><br />
<div id="user-info"></div>
<div id="user-checkins"></div>
<p><button id="fb-auth">Login</button></p>
</body>
</html>
我尝试了几种方法，例如：
checkin.tags // shows [object Object]
checkin.tags.length // shows undefined
checkin.tags.name // shows undefined
checkin.tags[0] // shows undefined
checkin.tags[0].name // Can not read property 'name' of undefined
这发生在标签、喜欢和评论上。其他不是数组的工作正常，例如“checkin.place.name”，甚至“checkin.place.location.latitude”都会带来正确的值。
我做了一个“console.log(JSON.stringify(checkin.tags));” 它返回：
{"data":[{"id":"100001702765878","name":"Mauricio Forte Neto"},{"id":"100001174670611","name":"Mario Celso"}],"paging":{"next":"https://graph.facebook.com/402127889842448/tags?access_token=AAAD5ih3qDDEBAIo3nB8P3ZCAwXrivw5lunDRAUvkRZCCFZBUy5au3ImicViq80HHVZC29hLDit6QwlZCXZB5WEBkDF3Pp2DrnUGWLrAwhpWddLoliyFDqd&limit=25&offset=25&__after_id=100001174670611"}}
请帮忙。
提前致谢。