Ionic **BUG** in provider

Ionic Framework ionic-v3
#1

I have an application that consumes an api, everything is fine when I run the ionic, it works 100%, it makes the requests in the api, everything is ok, but when I do the build in xcode and I open the app, it does not give me an error, but simply does not make any requirement in the API

GIF in ionic serve -> https://gyazo.com/33c7d310f077a83617d48e7ab214d69a

GIF in xcode project -> https://gyazo.com/2fd3913a3e09c167c3378aeac2293b9a

method in my provider

{ 
    return this.http.post(this.url + 'api/userLogin', {
        "email": account.email,
        "password": account.password
    }, {
        "headers": {
            'Accept':'application/json'
        }
    });
}

Method in login.ts

{
    console.log(this.conta);
    this.webservice.login(this.account).subscribe(data => {
        if (data.status == true) {
            this.webservice.updateTokenApp(data.token_app);
            this.navCtrl.setRoot(DashboardPage);
            this.presentLoadingDefault();
            console.log(data.token_app);
        } else {
            this.message="login ou senha invalido";
            this.presentToast();
        }
    }
}``
OBS: My app work 100% in ionic serve
#2