ionic3+Angular4实现接口请求及本地json文件读取示例(2)

//contact.ts
import {ChangeDetectorRef, Component} from '@angular/core';
import { NavController } from 'ionic-angular';
import {DemoService} from "../../services/demo.service";

@Component({
 selector: 'page-contact',
 templateUrl: 'contact.html'
})
export class ContactPage {

 contactInfo=[];

 constructor(public navCtrl: NavController,
       private demoService: DemoService,
       private ref: ChangeDetectorRef,) {

 }

 ionViewDidLoad() {
  // 网络请求
  this.getRequestContact();
 }

 getRequestContact(){
  this.demoService.getRequestContact()
   .subscribe(res => {
    this.contactInfo = res.json();
    console.log("contactInfo------->",this.contactInfo);
    this.ref.detectChanges();
   }, error => {
    console.log(error);
   });
 }
}

// contact.html
<ion-header>
 <ion-navbar>
  <ion-title>
   联系人
  </ion-title>
 </ion-navbar>
</ion-header>

<ion-content>
 <ion-list>
  <ion-item *ngFor="let item of contactInfo">
   <div style="display: flex;flex-direction: column;">
    <span>姓名:{{item?.name}}</span>
    <span>年龄:{{item?.age}}</span>
    <span>信息:{{item?.message}}</span>
   </div>
  </ion-item>
 </ion-list>
</ion-content>