在Cordova中使用帮助程序类

Question

我正在尝试使用Cordova在Cordova + TypeScript + Angular中为我的rest api实现一个客户端类，我有类似的东西

myrestservice.ts ：

export class MyRestService {
  constructor(private http: HttpClient) {
  }
  doApiCall() {
  // ...
  }
}

并想在组件中使用 mycomponent.ts ：

import { MyRestService } from './../../services/myrestservice';
// some othe includes here
import { Component, } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { NavController } from 'ionic-angular';

export class MyPage {

  constructor(public navCtrl: NavController, public http: HttpClient) {
      let aquabox = new MyRestService(http);
      aquabox.doApiCall();
  }
}

但是当我尝试运行该应用程序时，我看到了：

Error: Cannot find module "."
    at webpackMissingModule (http://localhost:8100/build/vendor.js:117231:69)
    at http://localhost:8100/build/vendor.js:117231:147
    at Object.<anonymous> (http://localhost:8100/build/vendor.js:117240:3)
    at __webpack_require__ (http://localhost:8100/build/vendor.js:55:30)
    at Object.113 (http://localhost:8100/build/main.js:27:86)
    at __webpack_require__ (http://localhost:8100/build/vendor.js:55:30)
    at Object.222 (http://localhost:8100/build/main.js:285:71)
    at __webpack_require__ (http://localhost:8100/build/vendor.js:55:30)
    at Object.201 (http://localhost:8100/build/main.js:272:70)
    at __webpack_require__ (http://localhost:8100/build/vendor.js:55:30)

您知道为什么会这样吗？我需要以某种方式“注册”我的MyRestService类吗？