交流知识获取视频资料：

父组件向子组件传值   @Input

文件目录

 

父组件：

father.template.html

父组件
     

father.component.ts

import { Component, OnInit } from '@angular/core';@Component({    selector: 'cmt-father',    templateUrl: './father.template.html'})export class FatherComponent implements OnInit {    data: any = '我是传往子组件的值'    ngOnInit() {    }    ngOnChanges() {    }}

子组件：（使用@Input修饰器去接收）

childcomponent.ts

import { Component, OnInit, Input } from '@angular/core';@Component({    selector: 'cmt-child',    templateUrl: './child.template.html'})export class ChildComponent implements OnInit {    @Input() data: any;//接收父组件的值    ngOnInit() {        console.log(this.data)    }    ngOnChanges() {        console.log(this.data)    }}

这样就把值从父组件传到了子组件！

子组件向父组件传值（子组件通过方法借助修饰器@output传值给父组件）

子组件

childcomponent.ts

import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';@Component({    selector: 'cmt-child',    templateUrl: './child.template.html'})export class ChildComponent implements OnInit {    @Output('checked') checkedBack = new EventEmitter
     
      ();    id:any ="我是传给父组件的值"    ngOnInit() {    }    ngOnChanges() {    }    checkedCallback() {        this.checkedBack.emit(this.id);    }}
     

child.template.html.html

子组件
点击传值给父组件

父组件

father.template.html

父组件
     

father.component.ts

import { Component, OnInit } from '@angular/core';@Component({    selector: 'cmt-father',    templateUrl: './father.template.html'})export class FatherComponent implements OnInit {    ngOnInit() {    }    ngOnChanges() {    }        checkedBack(event) {        console.log(event)    }}

这样子组件通过点击就把值传递给了父组件！