const moreText = "加载完毕"; //foot显示的文案 
//页码 
var pageNum = 1; 
//每页显示数据的条数 
const pageSize = 10; 
//页面总数据数 
var pageCount = 0; 
//页面List总数据 
var totalList = new Array(); 
 
//foot： 0 隐藏 1 已加载完成 2 显示加载中 

<ListView 
 enableEmptySections={true} 
 dataSource={this.state.dataSource} 
 renderRow={this._renderRow.bind(this)} 
 renderFooter={this._renderFooter.bind(this)} 
 onEndReached={this._endReached.bind(this)} 
 onEndReachedThreshold={0} 
/> 

constructor(props) { 
 super(props); 
 this.state = { 
  dataSource: new ListView.DataSource({ 
   rowHasChanged: (r1, r2) => r1 !== r2, 
  }), 
  loaded: false,//控制Request请求是否加载完毕 
  foot:0,// 控制foot， 0：隐藏foot 1：已加载完成 2 ：显示加载中 
  error:false, 

componentWillMount() { 
 this._fetchListData(); 
} 

_fetchListData() { 
 if(pageNum > 1){ 
  this.setState({loaded:true}); 
 } 
 fetch(requestURL, { 
  method: 'get', 
  headers: headerObj, 
 }).then(response =>{ 
  if (response.ok) { 
   return response.json(); 
  } else { 
   this.setState({error:true,loaded:true}); 
  } 
 }).then(json=>{ 
  let responseCode = json.code; 
  if (responseCode == 0) { 
   let responseData = json.data; 
 
   pageCount = responseData.count; 
   let list = responseData.data; 
 
   if (orderList == null) { 
    orderList = []; 
    currentCount = 0; 
   } else { 
    currentCount = list.length; 
   } 
   if(currentCount < pageSize){ 
    //当当前返回的数据小于PageSize时，认为已加载完毕 
    this.setState({ foot:1,moreText:moreText}); 
   }else{//设置foot 隐藏Footer 
    this.setState({foot:0}); 
   } 
   for (var i=0; i < list.length; i++) { 
    totalList.push( list[i] ); 
   } 
 
   this.setState({ 
    dataSource: this.state.dataSource.cloneWithRows(totalList), 
    loaded: true, 
   }); 
  }else{ 
   this.setState({error:true,loaded:true}); 
  } 
 }).catch(function (error) { 
  this.setState({error:true,loaded:true}); 
 }); 
} 

_renderFooter() { 
 if(this.state.foot === 1){//加载完毕 
  return ( 
  <View style={{height:40,alignItems:'center',justifyContent:'flex-start',}}> 
   <Text style={{color:'#999999',fontSize:12,marginTop:10}}> 
    {this.state.moreText} 
   </Text> 
  </View>); 
 }else if(this.state.foot === 2) {//加载中 
  return ( 
  <View style={{height:40,alignItems:'center',justifyContent:'center',}}> 
   <Image source={{uri:loadgif}} style={{width:20,height:20}}/> 
  </View>); 
 } 
} 

_endReached(){ 
 if(this.state.foot != 0 ){ 
 return ; 
 } 
 this.setState({ 
 foot:2, 
 }); 
 this.timer = setTimeout( 
 () => { 
  pageNum ++; 
  this._fetchListData(); 
 },500); 
} 

componentWillUnmount() { 
// 如果存在this.timer，则使用clearTimeout清空。 
// 如果你使用多个timer，那么用多个变量，或者用个数组来保存引用，然后逐个clear 
 this.timer && clearTimeout(this.timer); 
}