loginWithFB(userData) {


this.fb.login(['email', 'public_profile']).then((response: FacebookLoginResponse) => {
  this.fb.api('me?fields=id,name,email,first_name,picture.width(720).height(720).as(picture_small)', []).then(profile => {
    this.userData = { email: profile['email'], first_name: profile['first_name'], picture: profile['picture_small']['data']['url'], username: profile['name'] }

    if (this.userData != "") {

      this.navCtrl.setRoot(HomePage, { 'logfb': this.userData })

      this.events.publish('loginfacebook', this.userData, Date.now());
      //  this.navCtrl.push(HomePage, {
      //   'logfb': this.userData
      // });
    } else {
      let toast = this.toastCtrl.create({ duration: 3000, position: 'bottom'
  });
      toast.setMessage('Não foi possível logar com Facebook');
      toast.present();
    }
  })

});