angular 4 - Bootstrap 在路由中声明的延迟加载模块中不起作用

Question

我在我的 angular 4 项目中使用 bootstrap3。我有一个 DashboardComponent，其中包含一个导航菜单。我将一条路线声明为

{path: 'dashboard', loadChildren: 'app/dashboard/dashboard.module#DashboardModule'}

在路由模块和引导程序导航菜单中未正确显示。如果我将路由配置更改为

{path: 'dashboard', component: DashboardComponent}

那么它的工作正常。

以下是工作和非工作情况的屏幕截图。我能解决什么问题？

工作案例

非工作情况

dashboard-routing.module.ts

export const dashboardRoutes: Route[] = [
    {
      path: '',
      component: DashboardComponent,
      children: [
        { path: 'home', component: HomeComponent },
        { path: 'dispatches', component: DispatchesComponent },
        { path: '', component: HomeComponent }
      ]
    }
]

@NgModule({
  imports: [
    RouterModule.forChild(dashboardRoutes)
  ],
  exports: [RouterModule]
})
export class DashboardRoutingModule { }

这里是 dashboard.component.html

<div class="wrapper">
  <div class="sidebar" data-color='red' data-image="" style="overflow: hidden;">
    <sidebar-cmp></sidebar-cmp>
    <div class="sidebar-background" style="background-image: url(../assets/img/sidebar-4.jpg)"></div>
  </div>
  <div class="main-panel">
    <navbar-cmp></navbar-cmp>  
    <router-outlet></router-outlet>
    <footer-cmp></footer-cmp>  
  </div>
</div>

这是我的 app.module.ts

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

import { AppComponent }   from './app.component';
import { CustomMaterialModule } from './modules/custom-material.module';
import { AppRoutingModule } from './app-routing.module';
import { LoginComponent } from './login/login.component';

@NgModule({
  imports:  [
    BrowserModule,
    BrowserAnimationsModule,
    CustomMaterialModule,
    AppRoutingModule,
  ],
  exports: [CustomMaterialModule],
  declarations: [ AppComponent ],
  providers: [],
  entryComponents: [],
  bootstrap:  [ AppComponent ]
})

export class AppModule { }

app-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { LoginComponent } from './login/login.component';

const routes: Routes = [
  {
    path: '',
    redirectTo: 'dashboard',
    pathMatch: 'full'
  },
  {
    path: 'dashboard',
    loadChildren: 'app/dashboard/dashboard.module#DashboardModule',
  },
  {
    path: 'login',
    component: LoginComponent,
  }
];

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

dashboard.module.ts

import { NgModule } from '@angular/core';
import { RouterModule } from '@angular/router';
import { CustomMaterialModule } from './../modules/custom-material.module';
import { CommonModule } from '@angular/common';
import { SidebarModule } from './../sidebar/sidebar.module';
import { FooterModule } from './../shared/footer/footer.module';
import { NavbarModule} from './../shared/navbar/navbar.module';
import { MODULE_COMPONENTS } from './dashboard-routing.module';
import { DashboardComponent } from './dashboard.component';
import { DispatchesModule } from './dispatches/dispatches.module';
import { TransactionsModule } from './transactions/transactions.module';

import { DashboardRoutingModule } from './dashboard-routing.module';

@NgModule({
    imports: [
      CommonModule,
      CustomMaterialModule,
      DispatchesModule,
      TransactionsModule,
      SidebarModule,
      NavbarModule,
      FooterModule,
      DashboardRoutingModule,
    ],
    exports: [CustomMaterialModule],
    declarations: [ DashboardComponent, MODULE_COMPONENTS ]
})

export class DashboardModule{}