The*_*ner 8 html javascript facebook facebook-graph-api facebook-javascript-sdk
任何人都可以告诉我FB API的工作原理.它看起来是一个基本问题,但我真的很困惑.
问题:我有onlogin().当我单击登录按钮时,我希望它能够调用此功能.但是在我粘贴的代码中:我看到首先打印警报测试,然后调用FB.api.
因此,看起来首先调用onlogin,然后调用FB API ...有一种方法我只能调用此函数一次.
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({appId: 'XXX', status: true, cookie: true, xfbml: true});
};
(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);
}());
function checkFacebookLogin() {
FB.api('/me', function(response) {
alert("Name: "+ response.name + "\nFirst name: "+ response.first_name + "ID: "+response.id);
});
alert('test');
}
</script>
<p id="fb_login_button_1"><fb:login-button onlogin="checkFacebookLogin();" size="medium" scope="user_about_me">Sign in using Facebook</fb:login-button></p>
</body>v
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我的主要问题是该函数应该只调用一次....但它被调用两次.
小智 7
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({appId: 'XXX', status: true, cookie: true, xfbml: true});
};
(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);
}());
function fetchUserDetail()
{
FB.api('/me', function(response) {
alert("Name: "+ response.name + "\nFirst name: "+ response.first_name + "ID: "+response.id);
});
}
function checkFacebookLogin()
{
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
fetchUserDetail();
}
else
{
initiateFBLogin();
}
});
}
function initiateFBLogin()
{
FB.login(function(response) {
fetchUserDetail();
});
}
</script>
<input type="button" value="Sign in using Facebook" onclick="checkFacebookLogin();"/>
</body>
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