问反应本机NavigatorIOS错误:元素类型无效，需要字符串或类/函数

EN

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 */
'use strict';

import React, {
  AppRegistry,
  StyleSheet,
  NavigatorIOS,
  View,
  Text,
} from 'react-native';

var Dashboard = require('./App/Views/Dashboard/index.ios.js');

class HackerNews extends React.Component {
    render() {
        return (

            <NavigatorIOS style={styles.container}
                tintColor='#FF6600'
                initialRoute={{
                    title: 'Hacker News',
                    Component: Dashboard,
                }}/>
        );
    }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#F6F6FF',
  },

});

AppRegistry.registerComponent('HackerNews', () => HackerNews);

'use strict';

import React, {
    StyleSheet,
    Text,
    View,
    TouchableHighlight,
} from 'react-native';

//var api = require("../../Network/api.js");
//var Post = require("../Post/index.ios.js");

export default class Dashboard extends React.Component {
    constructor(props){
        super(props);
        this.state = {
            topStoryIDs: null,
            lastIndex: 0
        };
    }

    render(){
        return(
            <View>
                <Text>Dashboard Testing</Text>
            </View>
        );
    }
}