<!--carousel/index.wxml-->
<swiper class="imageContainer" bindchange="handleChange" previous-margin="50rpx" next-margin="50rpx" circular autoplay>
 <block wx:for="{{3}}" wx:key="{{index}}">
 <swiper-item class="item">
 <image class="itemImg {{currentIndex == index ? 'active': ''}}" src="../../../image/3.jpg"></image>
 </swiper-item>
 </block>
</swiper>

/* carousel/index.wxss */
page{
 background: #f7f7f7f7;
}
.imageContainer{
 width: 100%;
 height: 500rpx;
 background: #000;
}
.item{
 height: 500rpx;
}
.itemImg{
 position: absolute;
 width: 100%;
 height: 380rpx;
 border-radius: 15rpx;
 z-index: 5;
 opacity: 0.7;
 top: 13%;
}
.active{
 opacity: 1;
 z-index: 10;
 height: 430rpx;
 top: 7%;
 transition:all .2s ease-in 0s;
}

// carousel/index.js
Page({
 
 data: {
 currentIndex: 0
 },
 
 onLoad: function (options) {
  
 },
 /* 这里实现控制中间凸显图片的样式 */
 handleChange: function(e) {
 this.setData({
 currentIndex: e.detail.current
 })
 },
})