iOS8下路径变为：
/Users/username/Library/Developer/CoreSimulator/Devices/786824FF-6D4C-4D73-884A-696514481F7C/data/Containers/Data/Application/7D5B082E-53D5-4C60-86A0-1F6A0A1B98E3/Library/Caches/...
iOS8下bundle路径变更
原文：http://www.cnblogs.com/hanjun/p/3990844.html
