angular - TypeError:Guard不是函数

我不知道我是否漏掉了一些细节，或者我做错了什么，但我找不到是什么导致了这个错误。我的目标是做一些事情，在用户每次访问页面内的路由时，都会检查用户是否已登录。我用角度5。
App.module：

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { LoginComponent } from './pages/autenticacao/login.component';
import { AuthService } from './auth/auth.service';
import { RoutesInterceptor } from './auth/routes.interceptor';

import * as $ from 'jquery';

@NgModule({
  declarations: [ AppComponent, LoginComponent ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    AppRoutingModule,

  ],
  bootstrap: [AppComponent],
  providers: [ AuthService, RoutesInterceptor, ],
})
export class AppModule {
}

routes.interpetor:路径.interpetor：

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';

import { AuthService } from './auth.service';

@Injectable()
export class RoutesInterceptor implements CanActivate {

constructor(private auth: AuthService) {}

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    return this.auth.isUserAuthenticated();
}
}

我的路线：

import { NgModule } from '@angular/core';
import { ExtraOptions, RouterModule, Routes } from '@angular/router';

import { LoginComponent } from './pages/autenticacao/login.component';
import { RoutesInterceptor } from './auth/routes.interceptor';

const routes: Routes = [
  { path: 'pages', loadChildren: 'app/pages/pages.module#PagesModule', canActivate: [RoutesInterceptor] },
  { path: 'login', component: LoginComponent },
  { path: '', redirectTo: 'pages', pathMatch: 'full' },
  { path: '**', redirectTo: 'pages' },
];

const config: ExtraOptions = {
  useHash: true,
};

@NgModule({
  imports: [RouterModule.forRoot(routes, config)],
  exports: [RouterModule],
})
export class AppRoutingModule {
}

最佳答案

另一个可能导致这种情况的问题是，如果您尝试将CanActivate保护用作另一种类型的保护，比如CanActivateChild