我在尝试使用此Express应用程序时遇到问题。我想在Facebook getLoginStatus函数中调用(response.status ===' connected')if分支中的函数。这是代码:
(function(){
var app = angular.module('AppProva', ['ngResource']);
app.controller('friendFetcherCtrl', ['$window', function($window){
this.getFriends = function(){
console.log('GETFRIENDS()');
};
this.login = function() {
console.log('LOGIN()');
$window.fbAsyncInit = function() {
FB.init({
appId: '****************',
xfbml: true,
version : 'v2.3'
});
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
console.log('Logged in.');
this.getFriends();
/*Facebook graph query*/
}
else {
FB.login(function() { /* Do something */ }, { scope : 'user_friends, public_profile' });
}
});
};
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {
return;
}
js = d.createElement(s);
js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
};
}]);
})();
登录功能由div内的ng-init指令调用。 加载我的HTML页面时,我收到错误" TypeError:this.getFriends不是函数"。也许问题是我在$ window中的函数define中调用this.getFriends()。我怎样才能让事情奏效?
提前谢谢你, 弗朗西斯
编辑:我想我知道问题是"这个"关键字,但我怎么能让它没有?答案 0 :(得分:1)
这很简单。在FB.getLoginStatus
内,this
指向其他内容。解决方法:
(function(){
var app = angular.module('AppProva', ['ngResource']);
app.controller('friendFetcherCtrl', ['$window', function($window){
this.getFriends = function(){
console.log('GETFRIENDS()');
};
var self = this;
this.login = function() {
console.log('LOGIN()');
$window.fbAsyncInit = function() {
FB.init({
appId: '****************',
xfbml: true,
version : 'v2.3'
});
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
console.log('Logged in.');
self.getFriends(); //self will point to this in app.controller's function
/*Facebook graph query*/
}
else {
FB.login(function() { /* Do something */ }, { scope : 'user_friends, public_profile' });
}
});
};
(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'));
};
}]);
})();