1、子组件内容

import {Component} from "@angular/core";
@Component({
  selector: "my-contact",templateUrl: "<a (click)='childClick()'>单机事件</a>"
})
export class ChildComponent {
  constructor() {
    console.log("contact");
  }

  childClick() {
    alert("子组件的事件触发");
  }
}

2、父组件

import {Component,ViewChild} from "@angular/core";
import {ChildComponent} from "./child.component";
@Component({
  selector: "my-home",templateUrl: "<a (click)='parentClick()'>单机,调用子组件的方法</a>"
})
export class ParentComponent {
  @ViewChild(ChildComponent) child: ChildComponent;
    parentClick() {
        this.child.childClick();
    }
}