angular2指令“无法读取未定义的属性” subscribe”，带有输出元数据

您需要初始化输出：

import { Directive } from "@angular/core";

@Directive({
  selector: '[my-directive]',
  outputs: ['myEvent']
}) 
export class MyDirective {
  myEvent:EventEmitter<any> = new EventEmitter(); // <-----

  constructor() {
    console.log('>>>>>>>>> this.myEvent', this.myEvent);
  }
}

您还可以使用@HostListener装饰器：

@Directive({
  selector: '[my-directive]'
}) 
export class MyDirective {
  @HostListener('myEvent')
  myEvent:EventEmitter<any> = new EventEmitter(); // <-----

  constructor() {
    console.log('>>>>>>>>> this.myEvent', this.myEvent);
  }
}