Facebook graph api 如何从Angular2服务访问FB global?
我正在尝试使用FBSDK,它来自使用新AngularCLI创建的Angular2项目。我创建了以下服务来初始化Facebook库,添加了fbsdk类型和所有编译内容,但除了“winwow.fbAsyninit”函数外,我无法从项目中的任何位置访问FB全局变量。我可以从控制台完美地检查FB对象,但无法从NG2代码访问它。知道问题出在哪里吗Facebook graph api 如何从Angular2服务访问FB global?,facebook-graph-api,typescript,angular,angular-cli,Facebook Graph Api,Typescript,Angular,Angular Cli,我正在尝试使用FBSDK,它来自使用新AngularCLI创建的Angular2项目。我创建了以下服务来初始化Facebook库,添加了fbsdk类型和所有编译内容,但除了“winwow.fbAsyninit”函数外,我无法从项目中的任何位置访问FB全局变量。我可以从控制台完美地检查FB对象,但无法从NG2代码访问它。知道问题出在哪里吗 import { Injectable, OnInit } from '@angular/core' import { FACEBOOK_APPID } fro
import { Injectable, OnInit } from '@angular/core'
import { FACEBOOK_APPID } from '../constants'
@Injectable()
export class fbService implements OnInit{
constructor(){}
ngOnInit(){
if (!window.fbAsyncInit) {
window.fbAsyncInit = function () {
FB.init({
appId: FACEBOOK_APPID,
xfbml: false,
version: 'v2.6'
});
FB.api("/me",null,()=>{})
console.log(FB)
};
}
this.initFB()
}
initFB(){
var js, id = 'facebook-jssdk', ref = document.getElementsByTagName('script')[0];
if (document.getElementById(id)) {
return;
}
js = document.createElement('script');
js.id = id;
js.async = true;
js.src = "//connect.facebook.net/en_US/sdk.js";
ref.parentNode.insertBefore(js, ref);
}
getPost(page:string){
FB.api(`/${page}/feed?limit=1`,null,(response)=>{console.log(response)})
}
}
键位于对
this.zone.run(callback)
的调用中,以包装回调并将其重新插入Angular 2生命周期
我在服务构造函数中初始化SDK,与立即加载SDK相比,这可能会带来一些延迟。还没有找到解决办法
我还没有决定,一旦初始化了FB
或包装器方法,我是否会提供一个访问器,我将把它留给您
@Injectable()
export class FbsdkService {
public ready = new BehaviorSubject<boolean>(false);
constructor(
private zone: NgZone) {
this.loadSdkAsync(() => {
FB.init({
appId: "XXXXXXXXXXX",
status: false,
xfbml: false,
version: "v2.7"
});
this.ready.next(true);
});
}
loadSdkAsync(callback: () => void) {
window.fbAsyncInit = () => this.zone.run(callback);
// Load the Facebook SDK asynchronously
const s = "script";
const id = "facebook-jssdk";
var js, fjs = document.getElementsByTagName(s)[0];
if (document.getElementById(id)) return;
js = document.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs)
}
}
@Injectable()
导出类FbsdkService{
public ready=新行为主体(false);
建造师(
私人专区:NgZone){
此.loadSdkAsync(()=>{
FB.init({
appId:“xxxxxxxxxx”,
状态:false,
xfbml:false,
版本:“v2.7”
});
这个。准备好了。下一个(对);
});
}
loadSdkAsync(回调:()=>void){
window.fbasyninit=()=>this.zone.run(回调);
//异步加载Facebook SDK
const s=“脚本”;
const id=“facebook jssdk”;
var js,fjs=document.getElementsByTagName[0];
if(document.getElementById(id))返回;
js=document.createElement;js.id=id;
js.src=“//connect.facebook.net/en_US/sdk.js”;
fjs.parentNode.insertBefore(js,fjs)
}
}
我也有类似的问题,这个来源对我帮助很大-
从'@angular/core'导入{Injectable,NgZone};
从“rxjs/Rx”导入{BehaviorSubject};
从'@angular/Http'导入{Http};
声明var FB:任何;
@可注射()
导出类FbsdkService{
public ready=新行为主体(false);
公共端点基http://graph.facebook.com';
构造函数(专用区域:NgZone,专用http:http){
}
公共加载SDK(){
this.loadAsync(()=>{});
}
公共loadAsync(回调:()=>void){
window.fbasyninit=()=>this.zone.run(回调);
const s=“脚本”;
const id=“facebook jssdk”;
var js:any,fjs=document.getElementsByTagName[0];
if(document.getElementById(id))返回;
js=document.createElement;
js.id=id;
js.src=“//connect.facebook.net/en_US/sdk.js”;
fjs.parentNode.insertBefore(js,fjs);
}
公共getLoginStatus(){
FB.getLoginStatus((响应:any)=>{console.log(响应);});
}
公共getProfile(){
返回新承诺((解决、拒绝)=>{
设字段=[
“身份证”、“姓名”、“电子邮件”、“封面”、“生日”
];
api(`/me?fields=${fields.toString()}`,(响应:any)=>{
决心(回应);
});
});
}
}
静态地在html中添加脚本元素怎么样。经过一些测试,它看起来与ng2的生命周期有关。如果我在fbService的构造函数上设置了init函数,那么一旦加载了所有dom,我就可以从任何按钮单击事件访问FB全局。如果我试图从组件访问它,OnInit事件FB尚未定义。
import { Injectable, NgZone } from '@angular/core';
import { BehaviorSubject } from "rxjs/Rx";
import { Http } from '@angular/http';
declare var FB: any;
@Injectable()
export class FbsdkService {
public ready = new BehaviorSubject<boolean>(false);
public endpointBase = 'http://graph.facebook.com';
constructor(private zone: NgZone, private http: Http) {
}
public loadSdk() {
this.loadAsync(() => { });
}
public loadAsync(callback: () => void) {
window.fbAsyncInit = () => this.zone.run(callback);
const s = "script";
const id = "facebook-jssdk";
var js: any, fjs = document.getElementsByTagName(s)[0];
if (document.getElementById(id)) return;
js = document.createElement(s);
js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}
public getLoginStatus() {
FB.getLoginStatus((response: any) => { console.log(response); });
}
public getProfile() {
return new Promise((resolve, reject) => {
let fields = [
"id", "name", "email", "cover", "birthday"
];
FB.api(`/me?fields=${fields.toString()}`, (response: any) => {
resolve(response);
});
});
}
}