<view class='swiper'>
    <swiper indicator-dots="{{indicatorDots}}" vertical="{{vertical}}" autoplay="{{autoplay}}" duration="{{duration}}" interval='{{interval}}' bindchange="bindchange"  circular="{{circular}}" style="height:{{imgheights[current]}}rpx;">
    <block wx:for='{{imgList}}' wx:key="{{index}}">
      <swiper-item>
        <image src="{{item}}" data-id='{{index}}' class="slide-image" mode="widthFix" bindload="imageLoad"/>
      </swiper-item>
      </block>
    </swiper>
  </view>

.swiper image {   width: 100%;   height: auto; }

data: {     //图片地址
    imgList: ['/images/wyh-img_bg.png', '/images/wyh-img8.png', '/images/wyh-img_shop1.png', '/images/wyh-img_bg1.png'],     //是否采用衔接滑动  
    circular: true,     //是否显示画板指示点  
    indicatorDots: false,     //选中点的颜色  
    indicatorcolor: "#000",     //是否竖直  
    vertical: false,     //是否自动切换  
    autoplay: true,     //自动切换的间隔
    interval: 2500,     //滑动动画时长毫秒  
    duration: 100,
　　     //所有图片的高度  （必须）
    imgheights: [],     //图片宽度 
    imgwidth: 750,     //默认  （必须）
    current: 0      }, imageLoad: function (e) {//获取图片真实宽度  
    var imgwidth = e.detail.width,       imgheight = e.detail.height,       //宽高比  
      ratio = imgwidth / imgheight;       console.log(imgwidth, imgheight)     //计算的高度值  
    var viewHeight = 750 / ratio;     var imgheight = viewHeight;     var imgheights = this.data.imgheights;     //把每一张图片的对应的高度记录到数组里  
    imgheights[e.target.dataset.id] = imgheight;     this.setData({       imgheights: imgheights     })   },   bindchange: function (e) {     // console.log(e.detail.current)
    this.setData({ current: e.detail.current })   },