堆叠式轮播

<view class="tower-swiper" bindtouchmove="towerMove" bindtouchstart="towerStart" bindtouchend="towerEnd">
<view class="tower-item {{item.zIndex==1?'none':''}}" wx:for="{{swiperList}}" wx:key style="--index:{{item.zIndex}};--left:{{item.mLeft}}">
<view class="swiper-item">
<image src="{{item.url}}" mode="aspectFill" wx:if="{{item.type=='image'}}"></image>
<video src="{{item.url}}" autoplay loop muted show-play-btn="{{false}}" controls="{{false}}" objectFit="cover" wx:if="{{item.type=='video'}}"></video>
</view>
</view>
</view>