模块appregistry不是已注册的可调用模块(调用runApplication)

我根本找不到让react导航工作的方法。我从互联网上复制了这些工作示例,但它们似乎不太管用。有人能告诉我我做错了什么吗。

我正在使用 节点:8.9.4 反应:16.3.0-α。1. 反应本机:0.54.0 反应导航:^1.4.0

//index.js
import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View
} from 'react-native';
import {
  TabNavigator,
  StackNavigator
} from 'react-navigation';

import Home from './first';
import Homes from './second';

export default class demoApp extends Component {
  render() {
    return (
      <SimpleNavigation/>
    );
  }
}

export const SimpleNavigation = StackNavigator({
  Home: { 
    screen: Home,
    header: { visible: false },
    navigationOptions: {
      title: 'Home',
      header: null
    },
  },
  Homes: { 
    screen: Homes,
    navigationOptions: {
      title: 'second'
    },
  },
},{});

这是第一个标签

//first.js
import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  Image,
  TextInput,
  Button,
  TouchableHighlight
} from 'react-native';

export default class Home extends Component {
    constructor(props){
        super(props);
        this.state = {zipCode: ''}
    }
    navigate = (zipCode) => {
        this.props.navigation.navigate('Search', zipCode);
    }
    render() {
        return (
            <View>
                <View>
                    <Text>An application to do things</Text>
                    <TextInput 

                        placeholder='Enter a Zip Code' 
                        onChangeText={(zipCode) => this.setState({zipCode})}
                        >
                    </TextInput>
                </View>
                <View>
                    <TouchableHighlight onPress={() => this.navigate(this.state.zipCode)}>
                        <Text>
                            Search
                        </Text>
                    </TouchableHighlight>
                </View>
            </View>
        );
    }
}

我似乎根本跑不动。我还尝试了其他许多教程。但没有一个奏效。我做错了什么?