http://plnkr.co/edit/yhQQZxTxB8ZVFysqO6lP?p=preview
在AppComponent加载之前,如何确保我的AuthService得到解决？
//main entry point
import {bootstrap} from '@angular/platform-browser-dynamic';
import {Http,HTTP_PROVIDERS} from '@angular/http';
import {App} from './app';
import {AuthService} from './auth.service';
import {provide,enableProdMode,APP_INITIALIZER} from '@angular/core';
bootstrap(App,[HTTP_PROVIDERS,provide("isLoggedIn",{ useFactory: (auth:AuthService) => () => auth.login(),deps:[HTTP_PROVIDERS],multi: true }),])
.catch(err => console.error(err));
解决方法
您可以使用APP_INITIALIZER令牌来提供您的authFactory：
//main entry point
import {bootstrap} from '@angular/platform-browser-dynamic';
import {Http,APP_INITIALIZER} from '@angular/core';
export function authFactory(auth: AuthService){
return auth.login()
}
bootstrap(App,[
HTTP_PROVIDERS,{
provide: APP_INITIALIZER,useFactory: (auth),deps: [AuthService],multi: true
}
]).catch(err => console.error(err));
