在Angular2上使用Q包

Question

我想在Angular 2，Ionic 2和TypeScript应用程序上使用Q。我有类似的东西，但它会引发Cannot read property 'defer' of undefined例外。

import { Component } from '@angular/core';
import { NavController, AlertController } from 'ionic-angular';
import { Platform } from 'ionic-angular';
import { Q } from 'q';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})

export class MyClass {
  constructor(public navCtrl: NavController, platform: Platform, public alertCtrl: AlertController) {    
  }

  doSomething() {
    let deferred = Q.defer();
    deferred.resolve(true);
  }
}

我用

安装了Q.

npm install q