Angular2 -没有LoggedInGuard的提供者

Question

我正在制作一个Anuglar2 rc-4网络应用程序。我试图限制路由，但是当我添加登录保护时，它告诉我没有提供者。我的正常登录服务代码工作正常，只是当我尝试添加登录保护和canActive路由时。对如何纠正这个错误有什么想法吗？

routes.ts

import { RouterConfig } from '@angular/router';
import { Home } from './components/home/home';
import { Login } from './components/login/login';
import { DashBoard } from './components/dashboard/dashboard';
import { User } from './components/user/user';
import { Store } from './components/store/store';
import { LoggedInGuard } from './models/logged-in.guard.ts'; 

export const routes: RouterConfig = [
    { path: '', redirectTo: 'home', pathMatch: 'full' },
    { path: 'home', component: Home, canActivate: [LoggedInGuard] },
    { path: 'login', component: Login },
    { path: 'dashboard', component: DashBoard },
    { path: 'user', component: User },
    { path: 'store', component: Store },
    { path: '**', redirectTo: 'home' }
];

boot.ts

import { bootstrap } from '@angular/platform-browser-dynamic';
import { FormBuilder } from '@angular/common';
import { provideRouter } from '@angular/router';
import { HTTP_PROVIDERS, JSONP_PROVIDERS } from '@angular/http';
import { App } from './components/app/app';
import { routes } from './routes';

bootstrap(App, [
    HTTP_PROVIDERS,
    FormBuilder,
    provideRouter(routes)
]);

logged-in.guard.ts

import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { LoginService } from '../services/login.service';

@Injectable()
export class LoggedInGuard implements CanActivate {
  constructor(private ls: LoginService) {}

  canActivate() {
    return this.ls.isLoggedIn();
  }
}

Answer 1

必须将LoggedInGuard服务注入应用程序引导函数中。

bootstrap(App, [
    HTTP_PROVIDERS,
    FormBuilder,
    provideRouter(routes),
    LoggedInGuard // injected LoggedInGuard service provider here
]);

注意:对于当前的角2更新版本(rc.6)，这个答案不一样，当您升级时需要创建一个NgModule，在这里您要将所有依赖项封装在一个地方，那么LoggedInGuard将进入‘`NgModule’的providers选项中。

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