App.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 * @flow
 */

import React, {Component} from 'react';
import {Platform, StyleSheet, Text, View} from 'react-native';
import { createStackNavigator, createAppContainer } from 'react-navigation'

import Loading from './loading';
import SignUpView from './signup'
import LoginView from './login';
import Main from './main';


const App = createStackNavigator(
  {
    Loading,
    SignUpView,
    Main,
    LoginView
    
  },
  {
    initialRouteName: 'Loading'
  }
)
export default createAppContainer(App);

// type Props = {};
// export default class App extends Component<Props> {
//   render() {
//     return (
//       <View style={styles.container}>
//         <Text style={styles.welcome}>Welcome to React Native!</Text>
//       </View>
//     );
//   }
// }

// const styles = StyleSheet.create({
//   container: {
//     flex: 1,
//     justifyContent: 'center',
//     alignItems: 'center',
//     backgroundColor: '#F5FCFF',
//   },
//   welcome: {
//     fontSize: 20,
//     textAlign: 'center',
//     margin: 10,
//   },
//   instructions: {
//     textAlign: 'center',
//     color: '#333333',
//     marginBottom: 5,
//   },
// });