angular4,组件,多个
web前端-js教程应用场景,不同组件中操作统一组数据,不论哪个组件对数据进行了操作,其他组件中立马看到效果。这样他们就要共用一个服务实例,是本次的重点,如果不同实例,那么操作的就不是同一组数据,那么就不会有这样的效果,想实现共用服务实例,就是在所有父组件中priviates:[]中引入这个组件,子组件中不需要再次引入,那么他们都是用的父组件中的服务实例。
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1、公用服务用友记账源码,vscode编辑器卸载,Ubuntu改分区,tomcat环境配置推荐,白扁爬虫,php论文内容,seo推广有哪些费用引流,传媒公司 网站源码,非常好的企业网站模板asplzw
import {Injectable} from "@angular/core";@Injectable()export class CommonService { public dateList: any = [ { name: "张旭超", age: 20, address: "北京市朝阳区" } ]; constructor() { } addDateFun(data) { this.dateList.push(data); }}
2、parent.component.ts
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import {Component, OnInit} from "@angular/core";import {CommonService} from "./common.service";// 这里要通过父子公用服务来操作数据,只需要在父组件中引入服务。@Component({ selector: "parent-tag", templateUrl: "parent.component.html", providers: [ CommonService ]})export class ParentComponent implements OnInit { public list: any = []; constructor(private commonService: CommonService) { this.list = commonService.dateList; } ngOnInit() { }}
3、parent.component.html
{{item.name}} | {{item.age}} | {{item.address}} |
4、child-one.component.ts
import {Component} from "@angular/core";import {CommonService} from "./common.service";@Component({ selector: "child-one-tag", templateUrl: "child-one.component.html"})export class ChildOneComponent { public display: boolean = false; public username: string = ""; public age: number = 20; public address: string = ""; constructor(public commonService: CommonService) { } showDialog() { this.display = true; } hideDialog() { this.display = false; } addInfoFun() { let params = { name: this.username, age: this.age, address: this.address }; this.commonService.addDateFun(params); params = {}; }}
5、child-one.component.html
姓名:
年龄:
地址: