离子v3中的自定义组件 [英] Custom component in ionic v3

问题描述

我想创建一个简单的组件并将其包含在页面中.我用ionic g component my-header(ionic-cli v3 beta版)创建了它，修复了IonicPageModule错误，然后将其添加到另一个页面.然后我得到这个错误:

I wanted to create a simple component and include it on a page. I created it with ionic g component my-header (ionic-cli v3 beta), fixed the IonicPageModule bug and then added to another page. I then get this error:

Error: Uncaught (in promise): Error: Template parse errors:
'my-header' is not a known element:
1. If 'my-header' is an Angular component, then verify that it is part of this module.
2. If 'my-header' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

"MyHeaderComponent"已自动添加到@NgModule声明中.

The "MyHeaderComponent" was added to the @NgModule declarations automatically.

感谢您的帮助.

该组件位于我的components文件夹内:

The component is located inside my components folder:

components/my-header/my-header.html

components/my-header/my-header.html

<div>
  {{text}}
</div>

components/my-header/my-header.module.ts

components/my-header/my-header.module.ts

import { NgModule } from '@angular/core';
import { IonicModule } from 'ionic-angular';
import { MyHeaderComponent } from './my-header';

@NgModule({
  declarations: [
    MyHeaderComponent,
   ],
  imports: [
    IonicModule,
  ],
  exports: [
    MyHeaderComponent
  ],
  entryComponents:[
    MyHeaderComponent
  ]
})
export class MyHeaderComponentModule {}

components/my-header/my-header.scss

components/my-header/my-header.scss

my-header {}

components/my-header/my-header.ts

components/my-header/my-header.ts

import { Component } from '@angular/core';

@Component({
  selector: 'my-header',
  templateUrl: 'my-header.html'
})
export class MyHeaderComponent {

  text: string;

  constructor() {
    console.log('Hello MyHeaderComponent Component');
     this.text = 'Hello World';
  }

}

app/app.module.ts

app/app.module.ts

/* imports */
import { MyHeaderComponent } from '../components/my-header/my-header';

@NgModule({
  declarations: [
    MyApp,
    MyHeaderComponent
  ],
...

pages/home/home.html

pages/home/home.html

推荐答案

您不必在ngModule中导入MyHeaderComponent.

You dont have to import MyHeaderComponent in ngModule.

您应该将MyHeaderComponentModule导入到要使用此页面的模块中.

You should import MyHeaderComponentModule in your page module where you want to use this.

 imports: [
    MyHeaderComponentModule,
  ],

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