uniapp小程序实现多选全选反选功能

以下是完整的demo实例，由段龙龙博客编写，使用uniapp的可以直接全部复制粘贴到空白页面运行小程序即可，解决uniapp开发微信小程序实现多选全选反选功能
 

在此基础更新了一个版本，新增了清空功能以及清空问题，uniapp小程序实现checkbox多选并解决清空已选页面不渲染问题

代码:

<template>
	<view class="content">
		<view class="index_bottom">
			<view class="contrastbox">
				<view class="history-table-wrap">
					<view class="table">
						<view class="tr">
							<!-- 此处控制全选，反选切换 -->
							<view class="th th1"><checkbox @tap.stop="selectall"></checkbox>序号</view>
							<view class="th th2">名称</view>
							<view class="th th3">电量(kWh)</view>
							<view class="th th4">状态</view>
						</view>
						<view class="" style="width: 100%;margin: 0 auto;height:579rpx;overflow: auto;">
						<checkbox-group @change.stop="checkboxChange">
						<view class="tr" v-for="(i,index) in liebiaos" :style="(index+1)%2==1?'background:#f5f5f5':''">
							<view class="td td1"><checkbox :value="i.id" :checked="i.checked"></checkbox>{{index+1}}</view>
							<view class="td td2">{{i.name}}</view>
							<view class="td td3">{{i.name1}}</view>
							<view class="td td4">{{i.name2}}</view>
						</view>
						</checkbox-group>
						</view>
					</view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	var that;
	export default {
		data() {
			return {
				select_all: false, //是否为全选状态，true为是
				batchIds: [],    //选中的ids  将它传给后台就可以，这就是选择的结果
				liebiaos:[
					{
						name:'名字1',
						name2:'字段1',
						name2:'字段1',
						id:1
					},
					{
						name:'名字2',
						name2:'字段2',
						name2:'字段2',
						id:2
					},
					{
						name:'名字3',
						name2:'字段3',
						name2:'字段3',
						id:3
					},
					{
						name:'名字4',
						name2:'字段4',
						name2:'字段4',
						id:4
					},
					{
						name:'名字5',
						name2:'字段5',
						name2:'字段5',
						id:5
					},
					{
						name:'名字6',
						name2:'字段6',
						name2:'字段6',
						id:6
					},
				]
			}
		},
		onLoad() {
            that = this;
		},
		methods: {
            //全选与反全选
            selectall: function (e) {
                var arr = [];   //存放选中id的数组
            	if(that.select_all==false){
            		for (let i = 0; i < that.liebiaos.length; i++) {
            			that.select_all=true;
            			that.liebiaos[i].checked=true;
            			// 全选获取选中的值
            			arr.push(that.liebiaos[i].id);	   
            		}
            		  		
            	  }else{
            		  that.select_all=false;
            		  for (let i = 0; i < that.liebiaos.length; i++) {
            		  	that.liebiaos[i].checked=false;
            		  	// 全选获取选中的值
            		  	arr=[];	   
            		  }
            	  }
                
            	that.batchIds=arr;
				console.log(that.batchIds)
              },
            
              // 点击单个选择
              checkboxChange: function (e) {
            	that.batchIds=e.detail.value;
				console.log(that.batchIds)
              }
		}
	}
</script>

<style>
	* {
		margin: 0;
		padding: 0;
	}
	.content {
		width: 100%;
		overflow: auto;
		min-height: 100vh;
		background: #f5f5f5;
	}
	.index_bottom {
		width: 690rpx;
		background-color: #ffffff;
		box-shadow: 0rpx 8rpx 12rpx 0rpx rgba(87, 182, 230, 0.21);
		margin: 0 auto;
		border-radius: 20rpx;
		position: relative;
		margin-bottom: 30rpx;
		padding: 30rpx 0;
		height: 750rpx;
	}
	.contrastbox {
		position: relative;
		width: 627rpx;
		margin: 0 auto;
		padding-top: 16rpx;
		height: 656rpx;
	}
	
	.contrastbox_title {
		font-size: 23rpx;
		color: #8e8c8c;
	}
	.history-table-wrap {
		position: relative;
		width: 627rpx;
		overflow-y: scroll;
		overflow-x: hidden;
	}
	/* 表格代码   */
	.table {
		border: 1px solid #dadada;
		border-right: 0;
		border-bottom: 0;
		width: 99%;
	}
	
	.tr {
		width: 100%;
		display: flex;
		justify-content: space-between;
	}
	
	.th,
	.td {
		padding: 10px;
		border-bottom: 1px solid #dadada;
		border-right: 1px solid #dadada;
		text-align: center;
		width: 25%;
	}
	
	.th1,
	.th2,
	.td3,
	.td4 {
		width: 25%;
	}
	
	.th {
		font-weight: 800;
		background-color: #fff;
		font-size: 22rpx;
		color: #000;
	}
	
	.td {
		font-size: 20rpx;
		color: #000;
	}
	/* ------------------------------设置选框样式------------------- */
	checkbox .wx-checkbox-input {
		width: 25rpx;
		height: 25rpx;
		border-radius: 50%;
	}
	/*checkbox选中后样式  */
	checkbox .wx-checkbox-input.wx-checkbox-input-checked {
	  background: #0394F0;
	  border-color:#0394F0;
	}
	/*checkbox选中后图标样式  */
	checkbox .wx-checkbox-input.wx-checkbox-input-checked::before {
	  width: 18rpx;
	  height: 18rpx;  
	  line-height: 18rpx;
	  text-align: center;
	  font-size: 22rpx;
	  color: #fff;
	  background: transparent;
	  transform: translate(-50%, -50%) scale(1);
	  -webkit-transform: translate(-50%, -50%) scale(1);
	}
</style>