wxml：
<swiper indicator-dots="{{indicatorDots}}" vertical="{{vertical}}" bindchange="bindchange" style="height:{{imgheights[current]}}rpx;">

　　<block wx:for='{{imgUrls}}' wx:key="{{index}}">

      <swiper-item>

        <image src="{{item}}" data-id='{{index}}' mode="widthFix" bindload="imageLoad"  style='width:100%;' bindtap='imgYu' data-src="{{item}}" data-list="{{item}}"/>

      </swiper-item>

    </block>

</swiper>

data: {

    pl: false,

    inputMB: false,

    zanimg: '../../../images/xin.png',

    classzan: '',

    nu:false,

    swp:,

    imgUrls: [

    ],

    hd: false,

    hd1: false,

    back:false,

    zz: false,

    hasUserInfo: false,

    canIUse: wx.canIUse('button.open-type.getUserInfo'),

    canIUse1: wx.canIUse('button.open-type.openSetting'),

    //是否采用衔接滑动

    circular: true,

    //是否显示画板指示点

    indicatorDots: true,

    //选中点的颜色

    indicatorcolor: "#000",

    //是否竖直

    vertical: false,

    //滑动动画时长毫秒

    duration: ,

    //所有图片的高度

    imgheights: [],

    //图片宽度

    imgwidth: ,

    //默认

    current:

},

imageLoad: function (e) {//获取图片真实宽度

    var imgwidth = e.detail.width,

    var imgheight = e.detail.height,

    //宽高比

    var ratio = imgwidth / imgheight;

    //计算的高度值

    var viewHeight =  / ratio;

    var imgheight = viewHeight;

    var imgheights = this.data.imgheights;

    console.log("imgheights11", imgheights)

    //把每一张图片的对应的高度记录到数组里 +90是因为我给图片了一个width:100% 让图片宽撑满屏幕 如把100%去掉这个+90可去掉

    imgheights[e.target.dataset.id] = imgheight+;

    console.log("imgheights22", imgheights)

    this.setData({

      imgheights: imgheights

    })

  },

  bindchange: function (e) {

    this.setData({ current: e.detail.current})

  },

　//图片点击事件 点击图片放大

  imgYu: function(event) {

    var src = event.currentTarget.dataset.src; //获取data-src

    var imgList = event.currentTarget.dataset.list; //获取data-list

    wx.previewImage({

      current: src, // 当前显示图片的http链接

      urls: [src]

    })

  },