routes.js

// src/routes.js

import { StackNavigator } from 'react-navigation';

import Login from './pages/login';
import Logged from './pages/logged';

export const SignedOutRoutes = StackNavigator({
  Login: {
    screen: Login,
    navigationOptions: {
      title: "Entrar"
    }
  },
});

export const SignedInRoutes = StackNavigator({
  Logged: {
    screen: Logged,
    navigationOptions: {
      title: "Meu perfil"
    }
  },
});