ReactNative实现ListView分组，悬浮效果
欢迎大家访问我的个人网站 - Sunday俱乐部
实现效果
其实在ReactNative中实现ListView的分组效果的方式与Android中的ExpandableListview非常相似，只是在表现形式上更趋近于IOS中的UITableView而已。
在ReactNative中ListView分组效果的数据结构为
var dataBlob = {
'sectionId1' : {...sectionId1 data},
'sectionId1:rowId1' : {...row1 data},
'sectionId1:rowId2' : {...row2 data},
'sectionId2' : {...sectionId2 data},
'sectionId2:rowId1' : {...row1 data},
'sectionId2:rowId2' : {...row2 data},
...
}
var sectionIds = ['sectionId1','sectionId2','sectionId3'...];
var rowIds = [['rowId1','rowId2'...],['rowId1','rowId2'...],...];如上所示，在RN中ListView中的分组数据全部放入dataBlob 中，通过 ‘sectionId ’ 来获取每个组的header中的数据，通过 ‘sectionId:rowId’ 这种形式来获取每个组中对应的列的数据。其中’sectionId ‘保存在一个一维数组中，’rowIds’保存在一个二维数组中。
在state中去设置dataSource的方式也与普通的ListView有所不同。
// 初始化函数
getInitialState(){
var getSectionData = (dataBlob, sectionID) => {
return dataBlob[sectionID];
};
var getRowData = (dataBlob, sectionID, rowID) => {
return dataBlob[sectionID + ':' + rowID];
};
return{
dataSource: new ListView.DataSource({
getSectionData: getSectionData, // 获取组中数据
getRowData: getRowData, // 获取行中的数据
rowHasChanged: (r1, r2) => r1 !== r2,
sectionHeaderHasChanged:(s1, s2) => s1 !== s2
})
}
}下面是具体代码的实现方式：
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
ListView,
TouchableOpacity,
Image,
AlertIOS
} from 'react-native';
var Car = require('./Cars.json');
var SectionListView = React.createClass({
getInitialState(){
var getSectionData = (dataBlob,sectionID) => {
return dataBlob[sectionID];
};
var getRowData = (dataBlob,sectionID,rowID) => {
return dataBlob[sectionID + ":" + rowID];
};
return {
dataSource:new ListView.DataSource({
getSectionData:getSectionData,
getRowData:getRowData,
rowHasChanged:(r1 , r2) => r1 !== r2,
sectionHeaderHasChanged:(s1, s2) => s1 !== s2,
})
};
},
render(){
return(
this.state.dataSource}
renderRow={this.renderRow}
renderSectionHeader={this.renderSectionHeader}
contentContainerStyle={styles.listStyle}
/>
);
},
componentDidMount(){
this.loadListViewDataFormJson();
},
loadListViewDataFormJson(){
// 拿到所有的json数据
var jsonData = Car.data;
// 定义变量
var dataBlob = {},
sectionIDs = [],
rowIDs = [];
for (var i = 0 ; i < jsonData.length ; i++){
// 1.拿到所有的sectionId
sectionIDs.push(i);
// 2.把组中的内容放入dataBlob内容中
dataBlob[i] = jsonData[i].title;
// 3.设置改组中每条数据的结构
rowIDs[i] = [];
// 4.取出改组中所有的数据
var cars = jsonData[i].cars;
// 5.便利cars,设置每组的列表数据
for (var j = 0 ; j < cars.length ; j++){
// 改组中的每条对应的rowId
rowIDs[i].push(j);
// 把每一行中的内容放入dataBlob对象中
dataBlob[i+':'+j] = cars[j];
}
}
// 更新状态
this.setState({
dataSource: this.state.dataSource.cloneWithRowsAndSections(dataBlob,sectionIDs,rowIDs)
});
},
// 每一行中的数据
renderRow(rowData){
return (
{rowData.name}
);
},
// 每一组对应的数据
renderSectionHeader(sectionData,sectionId){
return (
{sectionData}
);
}
});
const styles = StyleSheet.create({
listStyle:{
},
sectionView:{
height:22,
backgroundColor:"#c3c3c3",
justifyContent:"center"
},
sectionTitle:{
marginLeft:16,
},
rowView:{
height:44,
flexDirection:'row',
paddingLeft:16,
alignItems:'center'
},
rowImage:{
width:44,
height:44
},
rowTitleSup:{
height:44,
width:700,
borderBottomWidth:1,
borderBottomColor:"#c3c3c3",
marginLeft:16,
justifyContent:'center'
},
rowTitle:{
fontSize:16,
}
});
module.exports = SectionListView;
Car.json
{
"data": [
{
"cars": [
{
"icon": "m_180_100.png",
"name": "AC Schnitzer"
},
{
"icon": "m_92_100.png",
"name": "阿尔法·罗密欧"
},
{
"icon": "m_9_100.png",
"name": "奥迪"
},
{
"icon": "m_97_100.png",
"name": "阿斯顿·马丁"
}
],
"title": "A"
},
{
"cars": [
{
"icon": "m_172_100.png",
"name": "巴博斯"
},
{
"icon": "m_157_100.png",
"name": "宝骏"
},
{
"icon": "m_3_100.png",
"name": "宝马"
},
{
"icon": "m_82_100.png",
"name": "保时捷"
},
{
"icon": "m_163_100.png",
"name": "北京汽车"
},
{
"icon": "m_211_100.png",
"name": "北汽幻速"
},
{
"icon": "m_168_100.png",
"name": "北汽威旺"
},
{
"icon": "m_14_100.png",
"name": "北汽制造"
},
{
"icon": "m_2_100.png",
"name": "奔驰"
},
{
"icon": "m_59_100.png",
"name": "奔腾"
},
{
"icon": "m_26_100.png",
"name": "本田"
},
{
"icon": "m_5_100.png",
"name": "标致"
},
{
"icon": "m_127_100.png",
"name": "别克"
},
{
"icon": "m_85_100.png",
"name": "宾利"
},
{
"icon": "m_15_100.png",
"name": "比亚迪"
},
{
"icon": "m_135_100.png",
"name": "布加迪"
}
],
"title": "B"
},
{
"cars": [
{
"icon": "m_129_100.png",
"name": "昌河"
}
],
"title": "C"
},
{
"cars": [
{
"icon": "m_113_100.png",
"name": "道奇"
},
{
"icon": "m_165_100.png",
"name": "大通"
},
{
"icon": "m_8_100.png",
"name": "大众"
},
{
"icon": "m_27_100.png",
"name": "东风"
},
{
"icon": "m_197_100.png",
"name": "东风风度"
},
{
"icon": "m_141_100.png",
"name": "东风风神"
},
{
"icon": "m_115_100.png",
"name": "东风风行"
},
{
"icon": "m_205_100.png",
"name": "东风小康"
},
{
"icon": "m_29_100.png",
"name": "东南"
},
{
"icon": "m_179_100.png",
"name": "DS"
}
],
"title": "D"
},
{
"cars": [
{
"icon": "m_91_100.png",
"name": "法拉利"
},
{
"icon": "m_199_100.png",
"name": "飞驰商务车"
},
{
"icon": "m_164_100.png",
"name": "菲斯克"
},
{
"icon": "m_40_100.png",
"name": "菲亚特"
},
{
"icon": "m_7_100.png",
"name": "丰田"
},
{
"icon": "m_67_100.png",
"name": "福迪"
},
{
"icon": "m_190_100.png",
"name": "弗那萨利"
},
{
"icon": "m_208_100.png",
"name": "福汽启腾"
},
{
"icon": "m_17_100.png",
"name": "福特"
},
{
"icon": "m_128_100.png",
"name": "福田"
}
],
"title": "F"
},
{
"cars": [
{
"icon": "m_109_100.png",
"name": "GMC"
},
{
"icon": "m_110_100.png",
"name": "光冈"
},
{
"icon": "m_147_100.png",
"name": "广汽"
},
{
"icon": "m_63_100.png",
"name": "广汽吉奥"
},
{
"icon": "m_133_100.png",
"name": "广汽日野"
},
{
"icon": "m_182_100.png",
"name": "观致汽车"
}
],
"title": "G"
},
{
"cars": [
{
"icon": "m_31_100.png",
"name": "哈飞"
},
{
"icon": "m_196_100.png",
"name": "哈弗"
},
{
"icon": "m_170_100.png",
"name": "海格"
},
{
"icon": "m_32_100.png",
"name": "海马"
},
{
"icon": "m_149_100.png",
"name": "海马商用车"
},
{
"icon": "m_181_100.png",
"name": "恒天汽车"
},
{
"icon": "m_58_100.png",
"name": "红旗"
},
{
"icon": "m_52_100.png",
"name": "黄海"
},
{
"icon": "m_112_100.png",
"name": "华泰"
},
{
"icon": "m_45_100.png",
"name": "汇众"
}
],
"title": "H"
},
{
"cars": [
{
"icon": "m_35_100.png",
"name": "江淮"
},
{
"icon": "m_37_100.png",
"name": "江铃"
},
{
"icon": "m_38_100.png",
"name": "江南"
},
{
"icon": "m_98_100.png",
"name": "捷豹"
},
{
"icon": "m_143_100.png",
"name": "吉利帝豪"
},
{
"icon": "m_144_100.png",
"name": "吉利全球鹰"
},
{
"icon": "m_148_100.png",
"name": "吉利英伦"
},
{
"icon": "m_39_100.png",
"name": "金杯"
},
{
"icon": "m_57_100.png",
"name": "金龙联合"
},
{
"icon": "m_161_100.png",
"name": "金旅客车"
},
{
"icon": "m_152_100.png",
"name": "九龙"
},
{
"icon": "m_4_100.png",
"name": "Jeep"
}
],
"title": "J"
},
{
"cars": [
{
"icon": "m_188_100.png",
"name": "卡尔森"
},
{
"icon": "m_107_100.png",
"name": "凯迪拉克"
},
{
"icon": "m_150_100.png",
"name": "开瑞"
},
{
"icon": "m_51_100.png",
"name": "克莱斯勒"
},
{
"icon": "m_145_100.png",
"name": "科尼塞克"
},
{
"icon": "m_212_100.png",
"name": "KTM"
}
],
"title": "K"
},
{
"cars": [
{
"icon": "m_86_100.png",
"name": "兰博基尼"
},
{
"icon": "m_200_100.png",
"name": "蓝海房车"
},
{
"icon": "m_80_100.png",
"name": "劳斯莱斯"
},
{
"icon": "m_94_100.png",
"name": "雷克萨斯"
},
{
"icon": "m_99_100.png",
"name": "雷诺"
},
{
"icon": "m_146_100.png",
"name": "莲花"
},
{
"icon": "m_153_100.png",
"name": "猎豹汽车"
},
{
"icon": "m_76_100.png",
"name": "力帆"
},
{
"icon": "m_16_100.png",
"name": "铃木"
},
{
"icon": "m_166_100.png",
"name": "理念"
},
{
"icon": "m_95_100.png",
"name": "林肯"
},
{
"icon": "m_36_100.png",
"name": "陆风"
},
{
"icon": "m_96_100.png",
"name": "路虎"
},
{
"icon": "m_83_100.png",
"name": "路特斯"
}
],
"title": "L"
},
{
"cars": [
{
"icon": "m_183_100.png",
"name": "迈凯伦"
},
{
"icon": "m_93_100.png",
"name": "玛莎拉蒂"
},
{
"icon": "m_18_100.png",
"name": "马自达"
},
{
"icon": "m_79_100.png",
"name": "MG"
},
{
"icon": "m_81_100.png",
"name": "MINI"
},
{
"icon": "m_201_100.png",
"name": "摩根"
}
],
"title": "M"
},
{
"cars": [
{
"icon": "m_155_100.png",
"name": "纳智捷"
}
],
"title": "N"
},
{
"cars": [
{
"icon": "m_104_100.png",
"name": "欧宝"
},
{
"icon": "m_84_100.png",
"name": "讴歌"
},
{
"icon": "m_171_100.png",
"name": "欧朗"
}
],
"title": "O"
},
{
"cars": [
{
"icon": "m_156_100.png",
"name": "启辰"
},
{
"icon": "m_43_100.png",
"name": "庆铃"
},
{
"icon": "m_42_100.png",
"name": "奇瑞"
},
{
"icon": "m_28_100.png",
"name": "起亚"
}
],
"title": "Q"
},
{
"cars": [
{
"icon": "m_30_100.png",
"name": "日产"
},
{
"icon": "m_78_100.png",
"name": "荣威"
},
{
"icon": "m_142_100.png",
"name": "瑞麒"
}
],
"title": "R"
},
{
"cars": [
{
"icon": "m_25_100.png",
"name": "三菱"
},
{
"icon": "m_209_100.png",
"name": "山姆"
},
{
"icon": "m_195_100.png",
"name": "绅宝"
},
{
"icon": "m_50_100.png",
"name": "双环"
},
{
"icon": "m_102_100.png",
"name": "双龙"
},
{
"icon": "m_111_100.png",
"name": "斯巴鲁"
},
{
"icon": "m_10_100.png",
"name": "斯柯达"
},
{
"icon": "m_89_100.png",
"name": "smart"
}
],
"title": "S"
},
{
"cars": [
{
"icon": "m_202_100.png",
"name": "泰卡特"
},
{
"icon": "m_189_100.png",
"name": "特斯拉"
}
],
"title": "T"
},
{
"cars": [
{
"icon": "m_140_100.png",
"name": "威麟"
},
{
"icon": "m_186_100.png",
"name": "威兹曼"
},
{
"icon": "m_19_100.png",
"name": "沃尔沃"
},
{
"icon": "m_48_100.png",
"name": "五菱"
}
],
"title": "W"
},
{
"cars": [
{
"icon": "m_13_100.png",
"name": "现代"
},
{
"icon": "m_174_100.png",
"name": "星客特"
},
{
"icon": "m_71_100.png",
"name": "新凯"
},
{
"icon": "m_87_100.png",
"name": "西雅特"
},
{
"icon": "m_49_100.png",
"name": "雪佛兰"
},
{
"icon": "m_6_100.png",
"name": "雪铁龙"
}
],
"title": "X"
},
{
"cars": [
{
"icon": "m_194_100.png",
"name": "扬州亚星客车"
},
{
"icon": "m_138_100.png",
"name": "野马汽车"
},
{
"icon": "m_100_100.png",
"name": "英菲尼迪"
},
{
"icon": "m_53_100.png",
"name": "一汽"
},
{
"icon": "m_41_100.png",
"name": "依维柯"
},
{
"icon": "m_75_100.png",
"name": "永源"
}
],
"title": "Y"
},
{
"cars": [
{
"icon": "m_136_100.png",
"name": "长安轿车"
},
{
"icon": "m_159_100.png",
"name": "长安商用"
},
{
"icon": "m_21_100.png",
"name": "长城"
},
{
"icon": "m_203_100.png",
"name": "之诺"
},
{
"icon": "m_60_100.png",
"name": "中华"
},
{
"icon": "m_167_100.png",
"name": "中欧"
},
{
"icon": "m_77_100.png",
"name": "众泰"
},
{
"icon": "m_204_100.png",
"name": "中通客车"
},
{
"icon": "m_33_100.png",
"name": "中兴"
}
],
"title": "Z"
}
]
}