typescript - CORS 策略 : No 'Access-Control-Allow-Origin' header is present on the requested resource in ionic 2

Question

编辑:

我是混合开发的新手。我提到了这个 Sample使用 ionic2 在 ListView 中解析 json。但是当我运行代码时，我只能在浏览器中看到空白屏幕。

下面我贴出了代码。请检查:

页面.ts:

import { Component } from '@angular/core';
import {Http} from '@angular/http';
import { NavController } from 'ionic-angular';
import 'rxjs/add/operator/toPromise';
@Component({
  selector: 'page-home',
  templateUrl: 'pages.html'
})
export class SlidingPage {
public items:any;
  constructor(public navCtrl: NavController,public http: Http) {
      this.http = http;
        this.http.get("http://api.randomuser.me/?results=10")
            .subscribe(data =>{

             // console.log(data['_body']);

          //   this.items=JSON.parse(data['_body']).results;//Bind data to items object

            this.items = data.json();


            },error=>{
                console.log(error);// Error getting the data
            } );
  }
buttonClick(event){
   console.log("button clicked");
   console.log(event);
  }
  itemClicked(event,itemData){
    console.log("item clicked");
    console.log(event);
    console.log(itemData);
  }
}

Pages.html:

<ion-header>
  <ion-navbar>

    <ion-title>
     List View
    </ion-title>

  </ion-navbar>
</ion-header>

<ion-content padding>
<ion-list>
    <ion-item *ngFor="let item of items" (click)="itemClicked($event,item)">

     <ion-avatar item-left>
        <img src="{{item.picture.thumbnail}}">
      </ion-avatar>

      <h2>{{item.name.first | uppercase }}</h2>
      <h3>{{item.gender}}</h3>
      <ion-icon *ngIf="item.gender=='female'" name="woman" item-left></ion-icon>
      <ion-icon *ngIf="item.gender=='male'" name="man" item-left></ion-icon>
      <ion-icon name="heart" item-right></ion-icon>

      <button ion-button item-right color="danger" (click)="buttonClick($event)">Button</button>

    </ion-item>
  </ion-list>
</ion-content>

我在 Console 中遇到了这个问题:

localhost/:1 XMLHttpRequest cannot load http://api.randomuser.me/?results=10. Redirect from 'http://api.randomuser.me/?results=10' to 'https://api.randomuser.me/?results=10' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access.

感谢任何帮助。

Answer 1

我提到了这个Allow Control Allow origin用于 Chrome 扩展。然后我按照以下步骤操作:

• 在 Chrome 浏览器中，设置 -> 扩展 -> 向下滚动并点击获取更多扩展。

• 在 chrome 网上商店中搜索 Allow origin allow control 并将其添加到浏览器。

  

• 然后开启启用跨源资源。