<swiper style="height: 1480rpx;"  vertical="{{true}}" bindchange="onSwiperScroll">

<swiper-item >

  <view class="banner" style="{{boxStyle}}" id="target-element">

  <swiper class="swiper" bindchange="swiperChange"  autoplay="true" interval='3000' style="height: {{swiperHeight}};">

  <swiper-item wx:for="{{banner}}">

    <image id="swiper-image" bindload='handleSwiperImageLoaded' mode="widthFix" style="width: 100% ; "  src="{{item.url}}"></image>

          </swiper-item>

</swiper>