ionic2 loading控件出错

Question

import { Component } from '@angular/core';import { NavController , LoadingController } from 'ionic-angular';@Component({  selector: 'page-contact',  templateUrl: 'contact.html'})export class ContactPage {  constructor(public NavCtrl:NavController,public LoadCtrl:LoadingController) {  this.user = {};    this.user.username = "";    this.user.password = "";  this.NavCtrl = NavCtrl;  }      showFill(){     let loading = this.LoadCtrl.create({      content:"...",      duration:3000    });    loading.present();    setTimeout(()=>{      loading.dismiss();    },3000);  }}这样写有什么错误吗？

Answer 1

export class ContactPage {

    user:any;

  constructor(public NavCtrl:NavController,public LoadCtrl:LoadingController) {

        this.user = {};

            this.user.username = "";

            this.user.password = "";

          }  

}

Answer 2

@Component({

  selector: 'page-contact',

  templateUrl: 'contact.html'

})

@应该是没有这个吧？

Answer 3

提示user没有定义，我用的Ionic2