StaticRenderer.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.

/**

 * Sample React Native App

 * https://github.com/facebook/react-native

 * @flow

 */

import React, { Component } from 'react';

import {

  AppRegistry,

  StyleSheet,

  TabBarIOS,

  Text,

  View,

  ListView,

  TouchableHighlight,

  Image,

  Dimensions,

} from 'react-native';

var width = Dimensions.get('window').width

var base64Icon = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEsA';

var List = React.createClass({

  getInitialState(props) {

    var ds = new ListView.DataSource({

      rowHasChanged: (r1, r2) => r1 !== r2

    });

    return {

      dataSource: ds.cloneWithRows([

      {

          "key":"1","_id":"130000198909236337","thumb":"http://dummyimage.com/1200X600/6f9768)","video":"http://www.imooc.com/4e7e33fe-53d1-45f5-942e-b9d42e98dc36"

      }

      ,

      {

          "key":"2","_id":"510000199207236389","thumb":"http://dummyimage.com/1200X600/094f1a)","video":"http://www.imooc.com/4e7e33fe-53d1-45f5-942e-b9d42e98dc36"

      }

    ]),

    };

  },

  renderRow(row) {

    <TouchableHighlight> 

      <View style={styles.item}>

        <Text style={styles.title}>{row._id}</Text>

         <Image

            source={{uri:row.thumb}}

            style={styles.thumb}

          >

            {/*<Icon 

              name="ios-play"

              size={28}

              style={styles.play}

              />*/}

            <Text style={styles.playText}></Text>

          </Image>

          <View style={styles.itemFooter}>

            <View style={styles.handleBox}>

              {/*<Icon 

                name="ios-heart-outline"

                size={28}

                style={styles.up}

                />*/}

              <Text style={styles.handleText}>喜欢</Text>

            </View>

            <View style={styles.handleBox}>

            {/*<Icon 

                name="ios-chatboxes-outline"

                size={28}

                style={styles.commentIcon}

                />*/}

              <Text style={styles.handleText}>评论</Text>

            </View>

          </View>

      </View>

    </TouchableHighlight>

  },

  render() {

    return (

      <View style={styles.container}>

        <View style={styles.header}>

          <Text style={styles.headerTitle}>列表</Text>

        </View>

        <ListView

          dataSource={this.state.dataSource}

          renderRow={this.renderRow}

          enableEmptySections={true}

        />

      </View>

      )

  }

})

var styles = StyleSheet.create({

  container: {

    flex: 1,

    backgroundColor: '#F5FCFF',

  },

  header: {

    paddingTop: 20,

    paddingBottom: 12,

    backgroundColor: '#ee735c'

  },

  headerTitle: {

    color: '#fff',

    fontSize: 16,

    textAlign: 'center',

    fontWeight: '600'

  },

  item: {

    width: width,

    marginBottom: 10,

    backgroundColor: '#fff'

  },

  thumb: {

    width: width,

    height: width * 0.5,

    resizeMode: 'cover'

  },

  title: {

    padding: 10,

    fontSize: 18,

    color: '#333'

  },

  itemFooter: {

    flexDirection: 'row',

    justifyContent: 'space-between',

    backgroundColor: '#eee'

  },

  handleBox: {

    padding: 10,    

    flexDirection: 'row',

    width: width / 2 - 0.5,    

    justifyContent: 'center',

    backgroundColor: '#fff'

  },

  play: {

    position: 'absolute',

    bottom: 14,

    right: 14,

    width: 46,

    height: 46,

    paddingTop: 9,

    paddingLeft: 18,

    backgroundColor: 'transparent',

    borderColor: '#fff',

    borderWidth: 1,

    borderRadius: 23,

    color: '#ed7b66'

  },

  playText: {

    position: 'absolute',

    bottom: 5,

    right: 5,

    fontSize: 20,

    color: '#ed7b66'

  },

  handleText: {

    paddingLeft: 12,

    fontSize: 18,

    color: '#333'

  },

  up: {

    fontSize: 22,

    color: '#333'

  },

  commentIcon: {

    fontSize: 22,

    color: '#333'

  }

})

module.exports = List