这是我的代码..
<!DOCTYPE html>
<html>
<head>
<title>sometitle</title>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.10.3/themes/dot-luv/jquery-ui.css" >
<link rel="stylesheet" type="text/css" href="style_home.css">
<script type="text/javascript" src="jquery.js"></script>
</head>
<body>
<script>
window.onload=function(){ document.getElementById('start_button').style.visibility='hidden';}
// This is called with the results from from FB.getLoginStatus().
function statusChangeCallback(response) {
console.log('statusChangeCallback');
console.log(response);
// The response object is returned with a status field that lets the
// app know the current login status of the person.
// Full docs on the response object can be found in the documentation
// for FB.getLoginStatus().
if (response.status === 'connected') {
// Logged into your app and Facebook.
testAPI();
} else if (response.status === 'not_authorized') {
// The person is logged into Facebook, but not your app.
document.getElementById('status').innerHTML = 'Please log ' +
'into this app.';
}
else {
// The person is not logged into Facebook, so we're not sure if
// they are logged into this app or not.
document.getElementById('status').innerHTML = 'Please log ' +
'into Facebook.';
}
}
// This function is called when someone finishes with the Login
// Button. See the onlogin handler attached to it in the sample
// code below.
function checkLoginState() {
FB.getLoginStatus(function(response) {
statusChangeCallback(response);
});
}
window.fbAsyncInit = function() {
FB.init({
appId : 'myappID',
cookie : true, // enable cookies to allow the server to access
// the session
xfbml : true, // parse social plugins on this page
version : 'v2.0' // use version 2.0
});
// Now that we've initialized the JavaScript SDK, we call
// FB.getLoginStatus(). This function gets the state of the
// person visiting this page and can return one of three states to
// the callback you provide. They can be:
//
// 1. Logged into your app ('connected')
// 2. Logged into Facebook, but not your app ('not_authorized')
// 3. Not logged into Facebook and can't tell if they are logged into
// your app or not.
//
// These three cases are handled in the callback function.
FB.getLoginStatus(function(response) {
statusChangeCallback(response);
});
};
// Load the SDK asynchronously
(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 = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
// Here we run a very simple test of the Graph API after login is
// successful. See statusChangeCallback() for when this call is made.
function testAPI() {
console.log('Welcome! Fetching your information.... ');
FB.api('/me', function(response) {
console.log('Successful login for: ' + response.name);
document.getElementById('status').innerHTML =
'Thanks for logging in, ' + response.name + '! You can now play the game! Click on Start Game to continue';
document.getElementById("start_button").style.visibility='visible';
});
}
</script>
<div class="fb-login-button" data-max-rows="1" data-size="xlarge" data-show-faces="true" data-auto-logout-link="false"></div>
<p>Some bla bla content here</p>
<!-- <form action="index2.html">
<input id="start_button" type="submit" value="Start Game">
</form> -->
<a id="start_button" href="index2.html">Start Game!</a>
<div class="fb-like" data-href="example.com" data-width="500" data-layout="standard" data-action="like" data-show-faces="true" data-share="true"></div>
<div id="status">
</div>
</body>
</html>
由于某些原因，此代码没有给出预期结果，尽管大部分代码是从developers.facebook.com 网站复制的。它应该运行 testAPI() 方法，但事实并非如此。我检查了控制台，在用户成功登录后，它显示响应对象的状态为“未知”。我有什么错误的原因吗？
谢谢。
最佳答案
这是因为您没有在fb登录按钮中设置onlogin="checkLoginState();"方法。希望添加此内容有帮助。
关于javascript - Facebook 对象登录后返回未知，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24476809/