我正在建立一个网站，当用户连接到Facebook时，会将个人资料图片附加到div等等。当我离开网站一段时间并回来时，我看到相同的个人资料图片被多次附加，所以很明显Facebook连接关闭并且每隔一段时间重新打开。
有没有办法阻止这个？
由于
<script>
window.fbAsyncInit = function() {
FB.init({
appId : '219892158204692',
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true // parse XFBML
});
// Here we subscribe to the auth.authResponseChange JavaScript event. This event is fired
// for any authentication related change, such as login, logout or session refresh. This means that
// whenever someone who was previously logged out tries to log in again, the correct case below
// will be handled.
FB.Event.subscribe('auth.authResponseChange', function(response) {
// Here we specify what we do with the response anytime this event occurs.
if (response.status === 'connected') {
fbconnect = true;
$('#fbloginbutton').hide();
$('#friendcontainer').append('<span id="loader"><center>Loading...</center></span>');
// The response object is returned with a status field that lets the app know the current
// login status of the person. In this case, we're handling the situation where they
// have logged in to the app.
FB.api(
"/me",
function (response) {
if (response && !response.error) {
fbid = response['id'];
user['id'] = response['id'];
getuserhighscore(user['id']);
userpercentile(parseInt(user['highscore']));
$('#statscontainer').append('<span class="label">Highest Score</span>: '+user['highscore']+'<br>');
$('#statscontainer').append('<span class="label">Percentile (global)</span>: '+user['percentile']+'<br>');
drawuserchart(user['id']);
}
}
);
FB.api(
"/fql?q=select%20uid%2C%20first_name%2C%20is_app_user%20from%20user%20where%20uid%20in%20(select%20uid2%20from%20friend%20where%20uid1%3Dme())%20and%20is_app_user%3D1",
function (response) {
console.log('friends installed:');
console.log(response);
console.log(response['data'][0].id);
var responseArray = [];
responseArray.push(response);
console.log(responseArray);
user['friends'] = response['data'].length;
if (response && !response.error) {
for (var i=0;i<response['data'].length;i++){
friend = response['data'][i];
console.log('friend coming up');
console.log(friend);
friends.push(friend.uid);
$('#friendcontainer').append('<div class="friendbox" id="'+friend.uid+'"></div>');
$('#'+friend.uid+'').append('<img class="friendpic" src="https://graph.facebook.com/'+friend.uid+'/picture?height=60&width=60&type=square">');
$('#'+friend.uid+'').append('<div class="friendname">'+friend.first_name+'</div>');
gethighscore(friend.uid);
$('#'+friend.uid+'').append(' - '+friendscores[i]+'');
console.log(friendscores);
}
$('#loader').remove();
user['friendrank'] = 1;
for (var i=0;i<friendscores.length;i++){
if(friendscores[i] > user['highscore']){
user['friendrank']++;
}
}
$('#statscontainer').append('<span class="label">Rank (among friends)</span>: '+user['friendrank']+'<br>');
} else {
console.log(response.error)
}
}
);
console.log(friends);
console.log(user)
FB.api(
"/me/picture",
{
"redirect": false,
"height": "100",
"type": "normal",
"width": "100"
},
function (response) {
if (response && !response.error) {
user['picture'] = response['data']['url'];
console.log(user['picture']);
$('#thumbnail').append('<img id="thumbnailpic" src="'+user['picture']+'">');
}
}
);
testAPI();
} else if (response.status === 'not_authorized') {
// In this case, the person is logged into Facebook, but not into the app, so we call
// FB.login() to prompt them to do so.
// In real-life usage, you wouldn't want to immediately prompt someone to login
// like this, for two reasons:
// (1) JavaScript created popup windows are blocked by most browsers unless they
// result from direct interaction from people using the app (such as a mouse click)
// (2) it is a bad experience to be continually prompted to login upon page load.
FB.login();
} else {
// In this case, the person is not logged into Facebook, so we call the login()
// function to prompt them to do so. Note that at this stage there is no indication
// of whether they are logged into the app. If they aren't then they'll see the Login
// dialog right after they log in to Facebook.
// The same caveats as above apply to the FB.login() call here.
FB.login();
}
});
};
// Load the SDK asynchronously
(function(d){
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.js";
ref.parentNode.insertBefore(js, ref);
}(document));
// Here we run a very simple test of the Graph API after login is successful.
// This testAPI() function is only called in those cases.
function testAPI() {
console.log('Welcome! Fetching your information.... ');
FB.api('/me', function(response) {
console.log('Good to see you, ' + response.name + '.');
$('#sidebar').slideDown("slow");
});
}
</script>
答案 0 :(得分：1)
FB.Event.subscribe上的<{auth.authResponseChange会被触发。用户会话保持几分钟，因此发生的事件是在某个时间后触发事件并再次附加照片。
您不应该在此事件块中编写整个代码。
所以，如果你想在同一页面上完成所有这一切，你可以做的是，保持一个bool，比如bool isLoaded=false;，现在你的电话完成时：isLoaded=true;表示数据装了。
只要错误就进行API调用，就像这样 -
if (response.status === 'connected') {
if(isLoaded){
fbconnect = true;
....
....
}
else
// dont do anything
}
希望有所帮助！