vant swipe点击切换

<van-swipe  ref="swiper">
  <van-swipe-item v-for="item in a" :key="item.id">
  </van-swipe-item>
</van-swipe>


<div  data-index="0" @click="onChange">勤奋榜</div>
<div  data-index="1" @click="onChange">进步榜</div>
<div  data-index="2" @click="onChange">优秀榜</div>


//点击事件
onChange(e){
    this.indexes = e.currentTarget.dataset.index
    this.$refs.swiper.swipeTo(this.indexes);
}