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我是 Angular 新手，所以我正在通过 Maximilian Schwarzmüller 的 Udemy 视频课程“Angular6 The Complete Guide”进行学习。我几乎即将完成课程，但在“了解 Angular 模块和优化应用程序”单元下的“将延迟加载添加到食谱模块”一章中坚持使用延迟加载。在此，讲师将整个食谱模块及其路由模块分开。我尝试对在应用程序根级别 -app-routing.module.ts 具有路由模块的购物模块执行相同的操作

1) app-routing.module.ts 代码

  import { NgModule } from '@angular/core';
  import { Routes, RouterModule } from '@angular/router';
  import { ShoppingListComponent } from './shopping-list/shopping-list.component';
  import { HomeComponent } from './home/home.component';

  const appRoutes: Routes = [
    { path: '', component: HomeComponent },
    { path: 'recipes', loadChildren: './recipes/recipes.module#RecipesModule'},
    { path: 'shopping-list', loadChildren: './shopping-list/shopping-list.module#ShoppingListModule'}
  //  { path: 'shopping-list', component: ShoppingListComponent }
  ];
  @NgModule({
  imports: [RouterModule.forRoot(appRoutes)],
  exports: [RouterModule]
  })
  export class AppRoutingModule {

  }

2)app.module.ts 代码

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

  // added below two
  import { HttpModule } from '@angular/http';
  import { AppComponent } from './app.component';
  // added header component
  // import { HeaderComponent } from './header/header.component';
  import { HeaderComponent } from './header/header.component';
  import { ShoppingListService } from './shopping-list/shopping-list.service';
  import { AppRoutingModule } from './app-routing.module';
  import { RecipeService } from './recipes/recipe.service';
  import { DataStorageService } from './shared/data-storage.service';
  import { AuthService } from './auth/auth.service';
  import { AuthGuard } from './auth/auth-guard.service';
  import { SharedModule } from './shared/shared.module';
  // import { ShoppingListModule } from './shopping-list/shopping-list.module';
  import { AuthModule } from './auth/auth.module';
  import { HomeComponent } from './home/home.component';


  @NgModule({
    declarations: [
      AppComponent,
      // add header comp
      HeaderComponent,
      HomeComponent
        ],
    imports: [
      BrowserModule,
      // add Forms and HTTP module
      // FormsModule,
      HttpModule,
      AppRoutingModule,
      SharedModule,
      // ShoppingListModule,
      AuthModule
    ],
    providers: [ShoppingListService, RecipeService, DataStorageService, AuthService, AuthGuard],
    bootstrap: [AppComponent]
  })
  export class AppModule { }

那么，为什么这行代码不起作用，即使根本没有错误呢？

{ path: 'shopping-list', loadChildren: './shopping-list/shopping-list.module#ShoppingListModule'}

我附上了我的项目文件结构图片项目文件结构

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1 回答 1

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因为你没有购物清单路由模块

于 2018-12-06T03:08:47.237 回答