login.js

import {Page, NavController, Modal, Alert} from 'ionic-angular';
import {AuthService} from '../../services/auth-service';
import {LoginForgetpasswordPage} from '../login-forgetpassword/login-forgetpassword';
import {HomePage} from '../home/home';

@Page({
  templateUrl: 'build/pages/login/login.html',
  providers: [AuthService]
})
export class LoginPage {

  static get parameters() {
    return [[NavController], [AuthService]];
  }

  constructor(nav, AuthService) {

    this.home = HomePage;
    this.forgetpassword = LoginForgetpasswordPage;
    this.login = {};

    this.authservice = AuthService;
    this.nav = nav;

    console.log('this.authservice', this.authservice);
  }


  onLogin() {
    if(this.login.username === undefined || this.login.password === undefined) {

      let confirm = Alert.create({
        title: "Acesso negado!",
        body: "Preencha os campos obrigatórios.",
        buttons: [{ text: "OK"}]
      });

      this.nav.present(confirm);

    } else {

      let objUser = {
        username: this.login.username,
        password: this.login.username
      };

      if(this.authservice.login(objUser)) {
          console.log('passou');
          this.nav.setRoot(this.home);
      } else {

        let confirm = Alert.create({
          title: "Acesso negado!",
          body: "Confira os dados de acesso e tente novamente.",
          buttons: [{ text: "OK"}]
        });

        this.nav.present(confirm);

      }

    }
  }

  onForgetPassword() {

    let modal = Modal.create(LoginForgetpasswordPage);

    modal.onDismiss((data) => {
      if(data) {

      }
    });

    // Toast.showShortBottom("Tarefa inserido com sucesso").subscribe((toast) => {
    //   console.log('toast');
    // });

    this.nav.present(modal);

  }

}