本文介绍了RouterModule.forRoot 调用了两次的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试在我的应用程序中实现延迟加载，但似乎遇到了一个问题，我收到了错误消息:

I am trying to implement Lazy Loading into my application but seem to be coming across an issue whereby I get the error message :

错误:RouterModule.forRoot() 调用了两次.延迟加载的模块应该改用 RouterModule.forChild().

所以我有我的主要 app-routing.module.ts 和 app-module.ts，如下所示:

So I have my main app-routing.module.ts and also app-module.ts which looks like below:

// External Dependencies
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

// Internal Dependencies
import { MaterialModule } from '../app/configuration/material/material.module';
import { SharedModule } from '../app/application/shared/shared.module';
import { RoutingModule } from '../app/configuration/routing/routing.module';
import { SettingsModule } from '../app/application/settings/settings.module';

import { AppComponent } from './app.component';

import { SearchService } from './application/shared/services/search.service';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserAnimationsModule,
    BrowserModule,
    SharedModule,
    RoutingModule,
    MaterialModule,
    HttpClientModule,
    FormsModule,
  ],
  providers: [ ],
  bootstrap: [AppComponent]
})

export class AppModule { }

app-routing.ts

// External Dependencies
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule, Routes } from '@angular/router';
import { HttpModule } from '@angular/http';

const appRoutes: Routes = [
  { path: '', redirectTo: 'overview', pathMatch: 'full' },
  { path: 'overview', loadChildren: '../../application/overview/overview.module#OverviewModule' },
  { path: 'search', loadChildren: '../../application/search/search.module#SearchModule' },
  { path: 'policy/:id', loadChildren: '../../application/policy/policy.module#PolicyModule' },
  { path: 'claim/:id', loadChildren: '../../application/claim/claim.module#ClaimModule' },
  { path: 'settings', loadChildren: '../../application/settings/settings.module#SettingsModule' }
];

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forRoot(appRoutes)
  ],
  exports: [
    RouterModule
  ],
  declarations: []
})

export class RoutingModule { }

这工作正常并且应用程序正确加载.这里的问题是，在 SharedModule 中，它提供了使用 routerLink 将用户重定向到新页面的组件.

This works fine and the application correctly loads. The issue from here is that in the SharedModule it has come components to redirect the user using routerLink to a new page.

// External Dependencies
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { CalendarModule } from 'primeng/calendar';
import { AgmCoreModule } from '@agm/core';
import { FroalaEditorModule, FroalaViewModule } from 'angular-froala-wysiwyg';
import { PdfViewerModule } from 'ng2-pdf-viewer';

// Internal Dependencies
import { MaterialModule } from '../../configuration/material/material.module';
import { RoutingModule } from '../../configuration/routing/routing.module';

import { NavbarTopComponent } from '../../application/shared/components/navbar-top/navbar-top.component';
import { NavbarSideComponent } from './components/navbar-side/navbar-side.component';
import { TemplateCardWComponent } from './components/template-card-w/template-card-w.component';
import { FilterPipe } from './pipes/filter.pipe';
import { StandardTableComponent } from './components/standard-table/standard-table.component';
import { OrderPipe } from '../shared/pipes/order.pipe';
import { ActionComponent } from './components/action/action.component';
import { GoogleMapComponent } from './components/google-map/google-map.component';
import { HtmlEditorComponent } from './components/html-editor/html-editor.component';
import { PdfViewerComponent } from './components/pdf-viewer/pdf-viewer.component';
import { KeyBindingPipe } from './pipes/key-binding.pipe';
import { StandardEditTableComponent } from './components/standard-edit-table/standard-edit-table.component';

@NgModule({
  imports: [
    CommonModule,
    MaterialModule,
    RoutingModule,
    FormsModule,
    CalendarModule,
    AgmCoreModule,
    FroalaEditorModule,
    FroalaViewModule,
    PdfViewerModule
  ],
  declarations: [
    NavbarTopComponent,
    NavbarSideComponent,
    TemplateCardWComponent,
    FilterPipe,
    StandardTableComponent,
    OrderPipe,
    ActionComponent,
    GoogleMapComponent,
    HtmlEditorComponent,
    PdfViewerComponent,
    KeyBindingPipe,
    StandardEditTableComponent
  ],
  exports: [
  ]
})

export class SharedModule { }

如您所见，我必须导入 RouterModule.如果我删除 RouterModule，应用程序将加载但不会重定向.如果我保留 RouterModule，应用程序将导致问题顶部的错误.

As you can see I am having to import the RouterModule. If I remove the RouterModule, the application will load but no re-direct. If I keep the RouterModule the application will cause the error at the top of the question.

谁能帮我解决这个问题.

Could anyone help me on this.

RouterModule

RouterModule.forRoot 调用了两次

问题描述

app-routing.ts

推荐答案