Angular 2将事件从父对象发送到所有子对象

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

@Component({
  selector: 'parent-component',
  template: `
    <button (click)="sendEvent()">发送事件</button>
    <child-component [event]="event"></child-component>
  `
})
export class ParentComponent {
  @Output() event: EventEmitter<any> = new EventEmitter();

  sendEvent() {
    this.event.emit('事件内容');
  }
}

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

@Component({
  selector: 'child-component',
  template: `
    <div>{{ receivedEvent }}</div>
  `
})
export class ChildComponent {
  @Input() event: any;
  receivedEvent: any;

  ngOnChanges() {
    this.receivedEvent = this.event;
  }
}