角度@Output 不起作用

Question

尝试与@Output 事件发射器进行子级与父级通信，但这里不起作用的是子组件

import { Component, OnInit, Output, Input, EventEmitter } from '@angular/core';

@Component({
  selector: 'app-emiter',
  templateUrl: './emiter.component.html',
  styleUrls: ['./emiter.component.css']
})
export class EmiterComponent implements OnInit {

@Output() emitor: EventEmitter<any>
  constructor() { this.emitor = new EventEmitter()}

   touchHere(){this.emitor.emit('Should Work');
   console.log('<><><><>',this.emitor) // this comes empty
  }

  ngOnInit() {
  }

}

这是 html 模板

<p>
<button (click)=" touchHere()" class="btn btn-success btn-block">touch</button>
</p>

touchHere 中的 console.log 即使我把它放在父组件中它也没有显示任何内容它也没有显示父组件

 import { Component , OnInit} from '@angular/core';
// service I use for other stuff//
    import { SenderService } from './sender.service';
// I dont know if I have to import this but did it just in case
    import { EmiterComponent } from './emiter/emiter.component'

@Component({
      selector: 'app-root',
      templateUrl: './app.component.html',
      styleUrls: ['./app.component.css']
    })
    export class AppComponent {
      title = 'app';
      user: any;
      touchThis(message: string) {
        console.log('Not working: ${message}');
      }
        constructor(private mySessionService: SenderService) { }
    }

这是 html 模板

<div>
  <app-emiter>(touchHere)='touchThis($event)'</app-emiter>
</div>

Answer 1

父组件模板：

  <app-emitor (emitor)='touchThis($event)'></app-emiter>

在父模板中，@Output 应该被“调用”，而不是子方法。

另请参阅：https : //angular.io/guide/component-interaction#parent-listens-for-child-event