首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 Javascript

React-Native左右联动List的示例代码

Posted in Javascript onSeptember 21, 2017

一：左右联动List,在工作中很常见。

今天分享一个同事写的例子，本人只做了简单修改。

注意：本例子必须修改源码，参考本文第三条。

二：Coding

ParcelPage.js:

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  FlatList,
  SectionList,
  Dimensions,
  TouchableOpacity,
  Image,
} from 'react-native';

import ParcelData from './ParcelData.json'

var { width, height } = Dimensions.get('window');

let Headers = [];


export default class ParcelPage extends Component {

  static navigationOptions = ({ navigation }) => ({
    headerTitle : '联动List',
  });

  componentDidMount() {
    ParcelData.map((item, i) => {
      Headers.push(item.section);
    });
  };

  componentWillUnmount() {
    Headers = [];
  };

  renderLRow = (item) => {
    return (
      <TouchableOpacity style={[ styles.lItem, {backgroundColor: item.index == this.state.cell ? 'white' : null} ]}
               onPress={()=>this.cellAction(item)}>
        <Text style={styles.lText}>{ item.item.section }</Text>
      </TouchableOpacity>
    )
  };

  cellAction = (item) => {
    if (item.index <= ParcelData.length) {
      this.setState({
        cell : item.index
      });
      if (item.index > 0) {
        var count = 0;
        for (var i = 0;
          i < item.index;
          i++) {
          count += ParcelData[ i ].data.length + 1
        }
        this.refs.sectionList.scrollToIndex({ animated : false, index : count })
      } else {
        this.refs.sectionList.scrollToIndex({ animated : false, index : 0 });
      }

    }

  };

  itemChange = (info) => {
    let section = info.viewableItems[ 0 ].section.section;
    if (section) {
      let index = Headers.indexOf(section);
      if (index < 0) {
        index = 0;
      }
      this.setState({ cell : index });
    }
  };

  state = {
    cell : 0
  };

  renderRRow = (item) => {
    return (
      <View style={ styles.rItem }>
        <Image style={ styles.icon } source={{ uri : item.item.img }}/>
        <View style={ styles.rItemDetail }>
          <Text style={ styles.foodName }>{ item.item.name }</Text>
          <View style={ styles.saleFavorite }>
            <Text style={ styles.saleFavoriteText }>{ item.item.sale }</Text>
            <Text style={ [styles.saleFavoriteText,{ marginLeft:15 }]}>{ item.item.favorite }</Text>
          </View>
          <Text style={ styles.moneyText }>￥{ item.item.money }</Text>
        </View>
      </View>
    )
  };

  sectionComp = (section) => {
    return (
      <View style={{height:30,backgroundColor:'#DEDEDE',justifyContent:'center',alignItems:'center'}}>
        <Text >{section.section.section}</Text>
      </View>
    )
  };

  separator = () => {
    return (
      <View style={{height:1,backgroundColor:'gray'}}/>
    )
  };

  render() {
    return (
      <View style={ styles.container }>
        <FlatList
          ref='FlatList'
          style={ styles.leftList }
          data={ ParcelData }
          renderItem={(item) => this.renderLRow(item)}
          ItemSeparatorComponent={ () => this.separator() }
          keyExtractor={ (item) => item.section }
        />
        <SectionList
          ref='sectionList'
          style={ styles.rightList }
          renderSectionHeader={ (section) => this.sectionComp(section) }
          renderItem={ (item) => this.renderRRow(item) }
          sections={ ParcelData }
          keyExtractor={ (item) => item.name }
          onViewableItemsChanged={ (info) => this.itemChange(info) }
        />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container : {
    flexDirection : 'row'
  },
  leftList : {
    width : 1 * width / 4,
    backgroundColor : '#E9E9EF'
  },
  lItem : {
    minHeight : 44,
    justifyContent : 'center',
  },
  lText : {
    marginLeft : 10,
    marginRight : 10,
    fontSize : 16,
  },
  rightList : {
    width : 3 * width / 4
  },
  rItem : {
    flexDirection : 'row'
  },
  rItemDetail : {
    flex : 1,
    marginTop : 10,
    marginLeft : 5
  },
  icon : {
    height : 60,
    width : 60,
    marginTop : 10,
    marginBottom : 10,
    marginLeft : 8,
    borderWidth : 1,
    borderColor : '#999999'
  },
  foodName : {
    fontSize : 18,
  },
  saleFavorite : {
    flexDirection : 'row',
    marginTop : 5,
    marginBottom : 5,
  },
  saleFavoriteText : {
    fontSize : 13,
  },
  moneyText : {
    color : 'orange'
  },
});

ParcelData.js

[
 {
  "section" : "热销",
  "data" : [
   {
    "name" : "蟹黄汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "20",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "小馄饨",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "蟹黄汤包+牛杂粉丝汤套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "35",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "鸭血粉丝汤",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "15",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "介绍我们",
  "data" : [
   {
    "name" : "慎用差评！任何问题联系我们就可解决哦",
    "sale" : "月售1",
    "favorite" : "赞0",
    "money" : "0",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   }
  ]
 },
 {
  "section" : "折扣套餐",
  "data" : [
   {
    "name" : "特色蟹黄汤包+鸭血粉丝汤+果汁套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "50",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "蟹黄汤包+牛杂粉丝汤套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "35",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "蟹黄汤包+南瓜粥+果汁套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "金牌蟹黄汤包+紫米粥+柠檬果汁套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "台式卤肉饭+南瓜粥套餐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "纯手工汤宝",
  "data" : [
   {
    "name" : "金牌蟹黄汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "蟹庭丰特色蟹黄汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "蟹黄汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "干贝汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "鲍鱼汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "全家福汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "虾仁汤包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "汤、粥类",
  "data" : [
   {
    "name" : "紫米粥",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "金丝南瓜粥",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "小米粥",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "白粥",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "面食类",
  "data" : [
   {
    "name" : "鸡汤面",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "红烧小排面",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "红烧牛肉面",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "调味小菜",
  "data" : [
   {
    "name" : "肉松",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "辣椒包",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "泡菜",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "酱黄瓜",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "萝卜干",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 },
 {
  "section" : "饮料",
  "data" : [
   {
    "name" : "可乐",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/__39230311__3449301.jpg"
   },
   {
    "name" : "雪碧",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p1.meituan.net/deal/849d8b59a2d9cc5864d65784dfd6fdc6105232.jpg"
   },
   {
    "name" : "王老吉",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   },
   {
    "name" : "橙汁",
    "sale" : "月售875",
    "favorite" : "赞31",
    "money" : "10",
    "img":"http://p0.meituan.net/deal/ed3025663342b126eaae24764704b017136487.jpg"
   }
  ]
 }
]

三：修改源码

1-:SectionList

node_modules/react-native/Libraries/Lists/SectionList.js,代码格式化后大概在187行的位置，修改如下

 class SectionList<SectionT: SectionBase<any>>
  extends React.PureComponent<DefaultProps, Props<SectionT>, void> {
  props: Props<SectionT>;
  static defaultProps: DefaultProps = defaultProps;

  render() {
    const List = this.props.legacyImplementation ? MetroListView : VirtualizedSectionList;
    return <List
      ref={this._captureRef}
      {...this.props} />;
  }

  _captureRef = (ref) => {
    this._listRef = ref;
  };

  scrollToIndex = (params: { animated?: ?boolean, index: number, viewPosition?: number }) => {
    this._listRef.scrollToIndex(params);
  }
}

2-:VirtualizedSectionList

路径在node_modules/react-native/Libraries/Lists/VirtualizedSectionList.js，大概253行处修改如下：

render() {
    return <VirtualizedList
      ref={this._captureRef}
      {...this.state.childProps} />;
  }

  _captureRef = (ref) => {
    this._listRef = ref;
  };

  scrollToIndex = (params: { animated?: ?boolean, index: number, viewPosition?: number }) => {
    this._listRef.scrollToIndex(params);
  }

四：

1-：代码github地址：https://github.com/erhutime/React-Navigation-All

2-：下载完成后，修改index.ios.js:入口文件如下：

import App from './jscode/doubleList/App'
AppRegistry.registerComponent('All', () => App);

五：效果图如下：

React-Native左右联动List的示例代码

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持三水点靠木。

React-Native左右联动List的示例代码

- Author -

Time_情书

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐
javascript 快速排序函数代码
May 30 Javascript
由点击页面其它地方隐藏div所想到的jQuery的delegate
Aug 29 Javascript
基于Jquery实现表单验证
Jul 20 Javascript
js+ajax实现获取文件大小的方法
Dec 08 Javascript
jquery 遍历数组 each 方法详解
May 25 Javascript
BootStrap iCheck插件全选与获取value值的解决方法
Aug 24 Javascript
javascript数组去重方法分析
Dec 15 Javascript
Jquery树插件zTree实现菜单树
Jan 24 Javascript
JS实现加载和读取XML文件的方法详解
Apr 24 Javascript
swiper移动端轮播插件（触碰图片之后停止轮播）
Dec 28 Javascript
js中getter和setter用法实例分析
Aug 14 Javascript
layui监听下拉选框选中值变化的方法(包含监听普通下拉选框)
Sep 24 Javascript
angularjs实现简单的购物车功能
Sep 21 #Javascript
JS实现前端缓存的方法
Sep 21 #Javascript
JS基于正则表达式实现的密码强度验证功能示例
Sep 21 #Javascript
jQuery实现的简单动态添加、删除表格功能示例
Sep 21 #jQuery
详解react服务端渲染（同构）的方法
Sep 21 #Javascript
详解node单线程实现高并发原理与node异步I/O
Sep 21 #Javascript
删除table表格行的实例讲解
Sep 21 #Javascript
R71E(1) R9700(1) ICOM(2) R72E(1) DE1107(3) 对讲机(1) React(6) 胆机(1) WR-800F(1) DE1102(1)
You might like
玩转虚拟域名◎＋ .
2006/10/09 PHP
PHP小教程之实现双向链表
2014/06/12 PHP
ThinkPHP2.x防范XSS跨站攻击的方法
2015/09/25 PHP
PHP实现补齐关闭的HTML标签
2016/03/22 PHP
thinkPHP js文件中U方法不被解析问题的解决方法
2016/12/05 PHP
浅谈php://filter的妙用
2019/03/05 PHP
利用XMLHTTP传递参数在另一页面执行并刷新本页
2006/10/26 Javascript
javascript 支持链式调用的异步调用框架Async.Operation
2009/08/04 Javascript
简单的代码实现jquery定时器
2013/11/17 Javascript
Javascript获取CSS伪元素属性的实现代码
2014/09/28 Javascript
JS上传组件FileUpload自定义模板的使用方法
2016/05/10 Javascript
谈谈因Vue.js引发关于getter和setter的思考
2016/12/02 Javascript
jQuery实现字符串全部替换的方法【推荐】
2017/03/09 Javascript
Node.js设置CORS跨域请求中多域名白名单的方法
2017/03/28 Javascript
jquery 获取索引值在一定范围的列表方法
2018/01/25 jQuery
Angular 5.x 学习笔记之Router(路由)应用
2018/04/08 Javascript
解决vue 单文件组件中样式加载问题
2019/04/24 Javascript
基于python编写的微博应用
2014/10/17 Python
python下调用pytesseract识别某网站验证码的实现方法
2016/06/06 Python
Python实现的逻辑回归算法示例【附测试csv文件下载】
2018/12/28 Python
Python中的支持向量机SVM的使用（附实例代码）
2019/06/26 Python
使用TensorFlow实现简单线性回归模型
2019/07/19 Python
Python使用Pandas对csv文件进行数据处理的方法
2019/08/01 Python
解析python的局部变量和全局变量
2019/08/15 Python
Python基于requests库爬取网站信息
2020/03/02 Python
用canvas做一个DVD待机动画的实现代码
2019/04/12 HTML / CSS
公司清洁工岗位职责
2013/12/14 职场文书
寄语学生的话
2014/04/10 职场文书
《少年王冕》教学反思
2014/04/11 职场文书
金融系应届毕业生求职信
2014/05/26 职场文书
乡镇平安建设汇报材料
2014/08/25 职场文书
在职证明书范本（2014新版）
2014/09/25 职场文书
运动会加油稿20字
2014/11/15 职场文书
幼儿园教师节感谢信
2015/01/23 职场文书
python井字棋游戏实现人机对战
2022/04/28 Python
Windows server 2016服务器基本设置
2022/08/14 Servers