vue+vant实现购物车全选和反选功能

<template>
 <div class="cart">
 <div class="st-spacing-main" v-for="(item) in cartInfoList" :key="item.id">
  <div class="st-item product-item">
  <div class="st-border-bottom store-title">
   <p @click="checkShop(item)">
   <van-checkbox v-model="item.checked">
    <span>
    {{item.shopTitle}}
    <van-icon name="arrow"/>
    </span>
   </van-checkbox>
   </p>
  </div>
  <ul class="commodity-list" v-for="(pros,value) in item.productList" :key="value">
   <li @click="ischeck(item,pros)">
   <van-checkbox v-model="pros.isChecked"></van-checkbox>
   </li>
   <li>
   //这是商品组件
   <product-cart size="mini" type="number" :option="3"></product-cart>
   </li>
  </ul>
  </div>
 </div>
 <van-submit-bar class="settlement" :price="10060" button-text="去结算" @submit="onSubmit">
  <van-checkbox v-model="isCheckAll" @click="checkAll()">全选</van-checkbox>
  <span class="cart-freight" slot="default">不含运费</span>
 </van-submit-bar>
 </div>
</template>

<script>
export default {
 data () {
 return {
  cartInfoList: [
  {
   id: 1,
   shopTitle: '苹果旗舰店', // 商店名
   checked: false, // 商店选择的状态
   checkedCount: 0, // 此商店被选择的商品数量
   productList: [
   {
    isChecked: false, // 商品选择状态
    productTitle: '2019款macbook/苹果/MF893/A国航笔记本', // 产品名
    category: '15寸/2.3/8G/256/土豪金/标准套餐',
    price: 10200, // 价格
    count: 1 // 数量
   }
   ]
  },
  {
   id: 2,
   shopTitle: '锤子科技旗舰店',
   checked: false,
   checkedCount: 0,
   productList: [
   {
    isChecked: false,
    productTitle: '锤子手机手感保护膜',
    category: '登陆月球',
    price: 9.9,
    count: 1
   },
   {
    isChecked: false,
    productTitle: '锤子手机pro割手版',
    category: '128G/割手版',
    price: 1790,
    count: 1
   }
   ]
  }
  ],
  isCheckAll: false, // 是否全选
  allPrice: 0, // 所有价格
  allShops: 0, // 被选中的商店数量
  allCount: 0 // 被选中的产品数量
 }
 },
 methods: {
 // 选中单个商品
 ischeck (item, pro) {
  // 为未选中的时候改变为false，反之为true
  !pro.isChecked "less" scoped>
@import "../assets/less/views/cart.less";
</style>

@spacing-size: .29rem;

.cart-main {
 .st-item-header {
 padding: @spacing-size;
 justify-content: flex-start;
 .theme-checkbox {
  margin-right: @spacing-size;
 }
 }
 .item-list {
 padding-left: .77rem;
 position: relative;
 .theme-checkbox {
  margin-top: -.24rem;
  position: absolute;
  left: 0;
  top: 50%;
 }
 }
}