angular8 大地老师学习笔记---第九课

父组件：news组件

<app-header [title]="title"  [msg]="msg" [run]='run' [home]='this'></app-header>

<div>我是首页组件</div>

子组件：header组件

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

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

  //接受父组件传来的数据
  @Input() title:any; 

  @Input() msg:any; 

  @Input() run:any; 

  @Input() home:any; 
  
  constructor() { }

  ngOnInit() {}

  getParentMsg(){
    //获取父组件的数据
    alert(this.msg);
  }

  getParentRun(){
    //执行父组件的run 方法
    // this.run();
    alert(this.home.msg);
    this.home.run();
  }

}