1. 音频大全
http://msching.github.io/blog/2014/08/09/audio-in-ios-6/
2. NSValue
http://www.cnblogs.com/pengyingh/articles/2371436.html
3. 动态增加属性
http://www.cnblogs.com/luoguoqiang1985/p/3551966.html
4. CABasicAnimation
http://www.cnblogs.com/daguo/archive/2013/05/27/3101621.html
5. CADisplayLink 和 NSTimer
http://blog.csdn.net/ch_soft/article/details/9408855
6. 对象数组排序
http://www.cnblogs.com/xiaobaizhu/p/4011167.html
7. 并行多线程
http://www.cnblogs.com/kenshincui/p/3983982.html#NSThread
8. 通讯录
http://www.open-open.com/code/view/1432302834146
9. ios 绘图教程
http://www.cocoachina.com/industry/20140115/7703.html
10. 开发小技巧
http://www.cnblogs.com/ios8/p/ios-tip.html
11. 多语言
http://www.cocoachina.com/cms/wap.php?action=article&id=8554 跟随系统
http://blog.csdn.net/xwren362922604/article/details/17190061 程序内部设定，可以不跟随系统
12. 互斥锁pthread_mutex_t的使用
http://www.cnblogs.com/crunchyou/archive/2013/02/20/2918207.html
http://blog.163.com/coffee_666666/blog/static/184691114201182125470/
13. 条件锁pthread_cond_t 的应用
http://blog.csdn.net/lusehu/article/details/6412146
14. NSFileHandle
http://www.cnblogs.com/viviyachu/p/3260139.html
http://www.tuicool.com/articles/AniiMn
15. AudioStreamBasicDescription
http://blog.sina.com.cn/s/blog_6568e7880100uf6v.html
16. Animation以及keyPath值
http://www.cocoachina.com/ios/20141022/10005.html
http://my.oschina.net/aofe/blog/270412
17. 不规则点触响应
http://ios.jobbole.com/81844/
18. 自定义layer的属性动画
http://www.cocoachina.com/industry/20140519/8470.html
19. GCD下实现同步的几种方式
http://www.cnblogs.com/Quains/archive/2013/07/10/3182823.html
20.