蓝牙

参考资料
http://blog.csdn.net/m372897500/article/details/50662976
http://www.cocoachina.com/ios/20161021/17813.html
http://www.jianshu.com/p/3ffe9f1b4130
http://www.jianshu.com/p/185f4ed5b340
http://www.jianshu.com/p/6e079da2370c
http://www.jianshu.com/p/bb40e5a0c0a9
http://www.cocoachina.com/ios/20161021/17813.html