<van-image bindtap="imgYu" data-list="{{item.images}}" data-src="{{itemson}}" custom-class="rightl"
          width="10rem" height="10rem" src="{{itemson}}" lazy-load show-menu-by-longpress />




  //图片点击事件
  imgYu: function (event) {
    var src = event.currentTarget.dataset.src;//获取data-src
    var imgList = event.currentTarget.dataset.list;//获取data-list
    //图片预览
    wx.previewImage({
      current: src, // 当前显示图片的http链接
      urls: imgList // 需要预览的图片http链接列表
    })
  },