在Angular网站上，他们有一个父组件和子组件使用@Output（）onVted=new EventEmitter相互交谈的示例

在这个给定的示例中，您是否需要取消订阅EventEmitter以防止内存泄漏/膨胀？或者框架会为您处理这个问题吗？

组件-交互/s rc/app/voter.组件. ts

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

@Component({
  selector: 'app-voter',
  template: `
    <h4>{{name}}</h4>
    <button (click)="vote(true)"  [disabled]="voted">Agree</button>
    <button (click)="vote(false)" [disabled]="voted">Disagree</button>
  `
})
export class VoterComponent {
  @Input()  name: string;
  @Output() onVoted = new EventEmitter<boolean>();
  voted = false;

  vote(agreed: boolean) {
    this.onVoted.emit(agreed);
    this.voted = true;
  }
}

组件-交互/s rc/app/投票者。组件。ts

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

@Component({
  selector: 'app-vote-taker',
  template: `
    <h2>Should mankind colonize the Universe?</h2>
    <h3>Agree: {{agreed}}, Disagree: {{disagreed}}</h3>
    <app-voter *ngFor="let voter of voters"
      [name]="voter"
      (onVoted)="onVoted($event)">
    </app-voter>
  `
})
export class VoteTakerComponent {
  agreed = 0;
  disagreed = 0;
  voters = ['Mr. IQ', 'Ms. Universe', 'Bombasto'];

  onVoted(agreed: boolean) {
    agreed ? this.agreed++ : this.disagreed++;
  }
}