angular - 如何在angular2中使用sharedModule？

我有一个angular2组件，我想在多个模块之间共享。
所以我在sharedmodule下面写道，

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {GenericComponent} from './generic/generic.component';
@NgModule({
  imports:      [ BrowserModule ],
  declarations: [ GenericComponent ],
  exports:      [ GenericComponent ]
})
export class SharedModule { }

然后我将这个sharedmodule添加到多个模块中，如下所示：
应用模块.ts

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {SharedModule} from './shared.module';
import { AppComponent } from './app.component';
@NgModule({
  imports:      [ BrowserModule,SharedModule ],
  declarations: [ AppComponent ],
  exports:      [ AppComponent ],
  bootstrap: [AppComponent]
})
export class AppModule { }

我还将sharedmodule添加到generic.module.ts中，类似地，
通用.module.ts

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {SharedModule} from './shared.module';
@NgModule({
  imports:      [ BrowserModule,SharedModule ],
  declarations: [ //.. here I have added all the components that generic uses ]
})
export class GenericModule { }

但是当我试图在generic.module.ts的组件中使用泛型组件时，我发现了下面的错误
模块“genericmodule”导入的意外值“undefined”

最佳答案

下面是我的应用程序中使用共享模块的代码：
应用模块：

import { AboutModule } from './about/about.module';
import { SharedModule }   from './shared/shared.module';
import { Menubar, MenuItem } from 'primeng/primeng';

@NgModule({
    imports: [ BrowserModule, RouterModule.forRoot(appRoutes), SharedModule.forRoot(),
               HomeModule ],
    declarations: [ AppComponent ],
    bootstrap: [ AppComponent ],
    providers: [ appRoutingProviders ]

})

export class AppModule {}

主模块：

import { SharedModule }   from '../shared/shared.module';
import {routing} from './home.routing'


@NgModule({
    imports: [ SharedModule, routing],
    declarations: [ HomeComponent, LoginComponent, RegisterComponent, VerifyComponent,
                   VerifyEmailComponent, ForgotComponent, ForgotVerifyComponent,
                   ChangeComponent, ChallengeComponent, LogoutComponent ],
    bootstrap: [ HomeComponent ],
    providers: [ ]

})

export class HomeModule {}

共享模块：

@NgModule({
  imports: [CommonModule, RouterModule, MenubarModule, GalleriaModule, InputTextModule, PanelModule, ButtonModule,
            DropdownModule, DialogModule, AccordionModule, CalendarModule, SelectButtonModule, CheckboxModule,
            ProgressBarModule, DataTableModule],
  declarations: [ ErrorMessagesComponent, FoodDashboardComponent ],
  exports: [ CommonModule, ReactiveFormsModule, HttpModule, RouterModule,
            MenubarModule, GalleriaModule, InputTextModule, PanelModule, ButtonModule, DropdownModule, DialogModule, AccordionModule, CalendarModule,
            SelectButtonModule, CheckboxModule, DataTableModule, ProgressBarModule, ErrorMessagesComponent, FoodDashboardComponent ]
})

export class SharedModule {
  //
  static forRoot(): ModuleWithProviders {
    return {
      ngModule: SharedModule,
      providers: [SettingsService, AppMenuService, AuthorizationService, LoginService, RegisterService, ThemeService, ValidationService,
        NutritionixService, AuthGuardService, CalculationService, ChallengeService ]
    };
  }
}

我有20多个模块在我的应用程序，我使用共享模块各地。这很管用。希望有帮助。