1.根目录:
NSHomeDirectory()
2.Document:
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0]
3.Cathes
NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0]
4.临时文件夹(tmp)
NSTemporaryDirectory()
5.APPPath
[NSBundle mainBundle].resourcePath
iOS常用文件路径
原文：http://www.cnblogs.com/kriskee/p/5206949.html
