tab分页高亮切换及tab交互

当用户点击页面中的 Tab 后，切换展示相应的商品列表，功能相对简单，快速实现即可。

// 存储高亮的下标
<script setup lang="ts">
// 高亮的下标
const activeIndex = ref(0)
</script>

<template>
  <!-- 推荐选项 -->
  <view class="tabs">
    <text
      class="text"
      v-for="(item, index) in subTypes"
      :key="item.id"
      :class="{ active: index === activeIndex }"
      @tap="activeIndex = index"
    >
      {{ item.title }}
    </text>
  </view>
  <!-- 推荐列表 -->
  //  v-show="activeIndex === index"  点击tab切换可以切换数据，tab的交互
  <scroll-view
    scroll-y
    class="scroll-view"
    v-for="(item, index) in subTypes"
    :key="item.id"
    v-show="activeIndex === index"
  >
    ...省略
  </scroll-view>
</template>

<style>
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
</style>