Angular 2多个组件声明

时间:2016-12-30 13:37:10

标签: angular typescript ionic2 ng-modules

我正在开发一个通用的Ionic 2应用程序,它包括在第一页上加载和显示多个组件。

每个附加组件都需要在应用程序中轻松创建和实现。所以我创建了一个名为" addon-declaration.ts "的文件。在这个文件中,我导出了所有组件:

export { MyFirstAddon } from './components/addon1/first.addon';
export { MySecondAddon } from './components/addon2/second.addon';
export { MyThirdAddon } from './components/addon3/third.addon';

所以我的问题是如何直接导入我的所有组件" app.module.ts "声明字段?

我已经尝试了这个,但它没有用:/

import * as ModuleHandler from '../models/addons/addon-declaration';

@NgModule({
  declarations: [
    MyApp,
    ModuleHandler <--- Not working
  ],
  imports: [
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp
  ],
  providers: [{provide: ErrorHandler, useClass: IonicErrorHandler}]
})
export class AppModule {}

如果我逐个导入它们,它会很好用:

import { MyFirstAddon } from'../components/addon1/first.addon';
import { MySecondAddon } from'../components/addon2/second.addon';
import { MyThirdAddon } from'../components/addon3/third.addon';

@NgModule({
      declarations: [
        MyApp,
        MyFirstAddon, <--- Working well
        MySecondAddon,
        MyThirdAddon
      ],

3 个答案:

答案 0 :(得分:4)

创建一个导出组件和指令的功能模块

@NgModule({
  declarations: [MyFirstAddon, MySecondAddon, MyThirdAddon],
  exports: [MyFirstAddon, MySecondAddon, MyThirdAddon]
})
export class MyAddonModule {}

将该模块添加到要使用插件的其他模块的导入

import { MyAddonModule } from './components/my-addon-module';

@NgModule({
  declarations: [
    MyApp,
    ModuleHandler <--- Not working
  ],
  imports: [
    IonicModule.forRoot(MyApp), MyAddonModule
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp
  ],
  providers: [{provide: ErrorHandler, useClass: IonicErrorHandler}]
})

答案 1 :(得分:1)

在放置所有插件文件的文件夹中创建一个index.ts,然后导出所有文件,如:

export * from './first.addon';
export * from './second.addon';
export * from './third.addon';
.....

然后您需要导入app.module.ts中的所有插件文件,如:

import * as allAddons from './addons_files';

最后你需要使用allAddons对象,如:

@NgModule({
    declarations: [
      // all-addons
      allAddons.FirstAddon,
      allAddons.SecondAddon,
      allAddons.ThirdAddon
    ]
})
export class AppModule() {
}

答案 2 :(得分:0)

declarations: [
   MyApp,
   ModuleHandler.MyFirstAddon,
   ModuleHandler.MySecondAddon,
   ModuleHandler.MyThirdAddon
]

或使用导出它们并导入模块的ngModule。