vue mint-ui中swipe高度自适应

动态设置图片高度 

<div class="aaa">
  <mt-swipe :auto="4000" :style="{ height: `${imgSize}px` }">
    <mt-swipe-item><img src="../imgs/banner3_img.png" ref="img"></mt-swipe-item>
    <mt-swipe-item><img src="../imgs/banner_img.png"></mt-swipe-item>
    <mt-swipe-item><img src="../imgs/banner2_img.png"></mt-swipe-item>
  </mt-swipe>
</div>

动态获取图片高度

data(){
  return{
    imgSize:0
  }
},
mounted() {
  this.imgSize = this.$refs['img'].offsetHeight;
  console.log(this.imgSize);
},