<view>
  <swiper
    style="height:150px"
    class="demo-swiper"
    autoplay="{{autoplay}}"
    vertical="{{vertical}}"
    interval="{{interval}}"
    circular="{{circular}}"
  >
    <block a:for="{{bannerList}}">
      <swiper-item>
        <view><image mode="scaleToFill" src="{{item.src}}" style="width:100%;" /></view>
      </swiper-item>
    </block>
  </swiper>
</view>