MifareClassic.transceive读数据返回data为什么为空？

//和卡建立连接
          mc.connect({
            success: function(res) {
              console.log("连接卡成功： " + JSON.stringify(res))

              //验证密码A指令
              var keyaBs = [0x60, 0x04, 0xAE, 0x38, 0x40, 0x39,  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF];
              //把字节数组转成ArrayBuffer
              var keyaArray = new Uint8Array(keyaBs.map(function (bs) {
                return bs;
              }));
              var keyaBuffer = keyaArray.buffer;
              //验证密码A
              mc.transceive({
                data:keyaBuffer,
                success:function(res){
                  console.error("验证密码A" + "成功" + res.errMsg);

                  var arr = [0x30, 1]
                  var arrayBuffer = new Int8Array(arr).buffer
                  var u8 = new Uint8Array(arrayBuffer)
                  for(var i = 0; i < u8.length; i ++) {
                    console.log(u8[i])
                  }
                  //发送指令
                  mc.transceive({
                    data: arrayBuffer,
                    success: function(res) {
                      console.log("transceive返回: " + JSON.stringify(res))
                    },
                    fail: function(e) {
                      console.log("transceive异常: " + JSON.stringify(e))
                    }
                  });

                },
                fail:function(res){
                  console.error("验证密码A" + "失败" + res.errMsg);
                },
                complete:function(res){
                  console.error("验证密码A" + "状态" + res.errMsg);
                }
              });

            },
            fail: function(e) {
              console.log("和卡连接异常: " + JSON.stringify(e))
            }
          })

结果：transceive返回: {“errMsg”:“transceive:ok”,“data”:{}}