Otaciohome.ts

import { Component } from '@angular/core';
import { NavController, ViewController } from 'ionic-angular';

import { HomeService } from './home.service';

@Component({
    selector: 'page-home',
    templateUrl: 'home.html',
    providers: [
      HomeService
    ]
})
export class HomePage {

    view: any;
    data: any;

    constructor(public navCtrl: NavController,public viewCtrl: ViewController, public service: HomeService) {

        this.view = viewCtrl;
        this.data = {
                      username: "",
                      password: ""
                    };
    }

    login() {
        this.service.getFunctions()
                    .subscribe(
                        datas => {
                              if(datas)
                                  console.log(datas)
                                  //this.view.dismiss(this.data)
                              else alert("usuario ou senha inválido")
        });

    }
}