1.父组件向子组件传值 @Input
文件目录
父组件：
father.template.html
<h1>父组件</h1><cmt-child [data]='data'></cmt-child>
ponent.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！
2.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<any>();id:any ="我是传给父组件的值"ngOnInit() {}ngOnChanges() {}checkedCallback() {this.checkedBack.emit(this.id);}}
child.template.html.html
<h1>子组件</h1><button (click)='checkedCallback()'>点击传值给父组件</button>
父组件
father.template.html
<h1>父组件</h1><cmt-child (checked)="checkedBack($event)"></cmt-child>
ponent.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！
