至少是模拟器目录有变
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/...
路径够深的。。想必是出于iOS进程间通信的考虑
iOS8之前为：
/Users/xiejinniu/Library/Application Support/iPhone Simulator/7.0.3/Applications/786824FF-6D4C-4D73-884A-696514481F7C/Library/Caches/...
两个红色框框表示的位置相同