微信小程序swiper左右扩展各显示一半代码实例

<swiper class='swiper' next-margin='120rpx' bindchange='swiper'>
 <block wx:for="{{devices}}" wx:key="" wx:for-item="device">
  <swiper-item item-id="{{device.type}}">
   <view class="device {{swiperIndex == index ?'active':''}}" data-currentTab="{{index}}">
    <view class='device-img'>
     <image src='{{device.deviceImg}}'></image>
    </view>
   </view>
  </swiper-item>
 </block>
</swiper>

Page({
 data: {
  swiperIndex: 0,
  // 设置页面
  devices: [
   {
    deviceImg: "../../img/1.jpg"
   },
   {
    deviceImg: "../../img/2.jpg"
   },
   {
    deviceImg: "../../img/3.jpg"
   }
  ],
 },
 swiper: function (e) {
  let that = this;
  let index = e.detail.current;
  that.setData({
   swiperIndex: index
  });
 }
})

/* 轮播图 */
.devices{
 width: 638rpx;
}
.swiper{
 width: 580rpx;
 height: 600rpx;
 margin-left:48rpx;
 white-space:nowrap;
 /* border: solid red 1px; */
}

.device{
 width: 410rpx;
 height: 94%;
 display:inline-block;
 margin-left: 20rpx;
 background: rosybrown;
 transform: scale(0.9);
 transition:all .2s ease 0s; 
}
.active{
 transform: none;
 transition: all 0.2s ease-in 0s;
}
.device-img{
 width: 100%;
 height: 520rpx;
 margin-top: 40rpx;
 display: flex;
 justify-content: center;
 align-items: center;
}
.device-img image{
 width:350rpx;
 height:190rpx;
}

{
 "usingComponents": {}
}