layer ui 导入文件之前传入数据的实例

<button type="button" data-id="1" class="layui-btn test1">导入路由表</button>
<button type="button" data-id="2" class="layui-btn test1">导入路由表</button>
<button type="button" data-id="3" class="layui-btn test1">导入路由表</button>
<button type="button" data-id="4" class="layui-btn test1">导入路由表</button>

 var uploadInst;//这里设置一个全局变量记录layer的对象

  $(".test1").click(function () {//这里绑定点击事件
    var game_id = $(this).attr('data-id');//取出data-id的值
    uploadInst.config.data.game_id=game_id//这里设置data的值之后就能传入后台了

  });
  layui.use('upload', function(){
    var upload = layui.upload;
    //执行实例
    uploadInst = upload.render({
      elem: '.test1' //绑定元素
      ,url: $("#upload_url").val()+'?game_id='+$("#get_data").val() //上传接口
      ,accept: 'file' //普通文件
      ,done: function(res){
        layer.msg(res.msg)
        //上传完毕回调
      }
      ,error: function(){
        //请求异常回调
      }
      ,before:function () {

      }
    });

  });