1 快速排序算法（这个必须会的）
http://blog.csdn.net/sws9999/article/details/2791812
2 线程、进程的知识(基础知识)
区别：
http://blog.csdn.net/andy6355/article/details/2506171
常用同步机制：
http://xia-siyu.blog.163.com/blog/static/274830412010911549960/
死锁的四个必要条件：
http://blog.csdn.net/andyxhua/article/details/649169
3 cocoaTouch框架
http://mobile.51cto.com/iphone-266014.htm
4 Json
http://www.json.org/json-zh.html
5 kvc
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/KeyValueCoding/Articles/KeyValueCoding.html
6 sqlite
http://www.cnblogs.com/hustcat/archive/2009/02/12/1389448.html