删除已选中的一张图片

//删除一张已选中的图片
  xImage: function (res){
    var that = this;
    var imgPart = that.data.imgPart;
    var imgUrls = that.data.imgUrls;
    var indexNum = res.currentTarget.dataset.index;
    imgPart.splice(indexNum, 1);
    imgUrls.splice(indexNum, 1);
    that.setData({
      imgPart,
      imgUrls
    })
  },