用vue 的 v-for 实现按钮选中改变样式，且获取对应值

<div class="vip-buy">
        <div v-for="(item,index) in vipSet"  :key="item.payprice" class="vip-buy-item"
             :class="{'select-item':index == clickIndex}" // 判断当前点击标签
             @touchstart="clickIndex = index" //记录当前点击标签
             @touchend="select(item.payprice)" //将对应值传递出去
        >
          <p>{{item.length}}</p>
          <p>{{item.priceNow}}</p>
          <p class="del">{{item.priceLast}}</p>
        </div>
      </div>
</div>