ios读取设备姿态并传输

CMDevice​Motion

http://nshipster.com/cmdevicemotion/  （中文翻译版 http://www.ithao123.cn/content-1352936.html）

http://www.voidcn.com/blog/wanglang3081/article/p-1769257.html

http://blog.csdn.net/xiaoxiaobukuang/article/details/51726088

http://www.cnblogs.com/wfwenchao/p/3908653.html  （文中说用户加速度数据已滤波，实际感觉数据的噪声还是不小）

socket

http://www.cnblogs.com/congli0220/p/5057015.html

Quaternions四元数

http://www.amobbs.com/thread-5483278-1-1.html

Gimbal Lock

https://www.youtube.com/watch?v=zc8b2Jo7mno&t=302s  （需要先解决翻墙问题）

http://www.ceeger.com/Unity/Doc/2011/Gimbal_Lock.html

accelerometer&gravity原理介绍

http://blog.csdn.net/jj2060/article/details/49533251

http://blog.csdn.net/u010076999/article/details/50922734