我尝试使用 ionic 框架并从我创建的 API 解析 json，然后用它填充我的 ionic 应用程序中的 html。当我转到我的 all-patients 页面时，我收到以下错误：

Error: Uncaught (in promise): Response with status: 0  for URL: null
    at c (http://130.215.45.72:8102/build/polyfills.js:3:19752)
    at c (http://130.215.45.72:8102/build/polyfills.js:3:19461)
    at http://130.215.45.72:8102/build/polyfills.js:3:20233

我的 all-patients.ts：

import { Component } from '@angular/core';

import { NavController } from 'ionic-angular';
import { RestService } from '../../providers/rest-service/rest-service';

@Component({
  selector: 'page-all-patients',
  templateUrl: 'all-patients.html',
  providers: [RestService]
})
export class AllPatientsPage {
  public data: any;

  constructor(public navCtrl: NavController, public restService: RestService){
    this.loadPeople();
  }

  loadPeople(){
    this.restService.load()
    .then(data => {
      this.data = data;
    });
  }
}

rest-services.ts：

import { Http } from '@angular/http';
import { Injectable } from '@angular/core';
import 'rxjs/add/operator/map';

/*
  Generated class for the RestServiceProvider provider.

  See https://angular.io/guide/dependency-injection for more info on providers
  and Angular DI.
*/

@Injectable()
export class RestService {

  constructor(public http: Http) {
    console.log('Hello RestServiceProvider Provider');
  }

  load() {
  if (this.data) {
    // already loaded data
    return Promise.resolve(this.data);
  }

  // don't have the data yet
  return new Promise(resolve => {
    this.http.get('url')
      .map(res => res.json())
      .subscribe(data => {
         this.data = data.results;
         resolve(this.data);
       });
  });
}
}

当我转到出现错误的页面时，它完全崩溃了，但控制台中没有打印出任何内容。我不确定这是 API 中数据解析错误还是其他原因。我手动转到 api 页面，数据按预期显示。