Unity中关于用C#脚本通过蓝牙传数据的BytesToRead问题

[colorfishes]

private void ReceiveData()
    {
        try
        {
			Byte[] buf = new Byte[1];
            string sbReadline2str = string.Empty;
			if (sp.IsOpen){
				//int bytes = sp.BytesToRead;      程序加上这两句Unity就会卡死并且强制退出。
				//print (bytes);
				sp.Read(buf, 0, 1);
			}else{
				print ("没有数据");
			}
            if (buf.Length == 0)
            {
                return;
            }
            if (buf != null)
            {
                for (int i = 0; i < buf.Length; i++)
                {
                    sbReadline2str += buf[i].ToString("X2");
                    queueDataPool.Enqueue(sbReadline2str);
                }
            }
        }
        catch (Exception ex)
        {
            Debug.Log(ex);
        }
    }