http://www.crifan.com/how_to_add_image_picture_into_ios_simulator_photos_album/
至此，算是终于找到项目的截图了，有两个位置：
1./Users/你的用户名/Library/Application Support/iPhone Simulator/模拟器版本号/Applications/Xcode所生成的某项目的编号/Library/Caches/Snapshots/项目名
2./Users/你的用户名/Library/Application Support/iPhone Simulator/模拟器版本号/Library/Caches/Snapshots/iOS项目名
比如：
/Users/crifan/Library/Application Support/iPhone Simulator/5.1/Library/Caches/Snapshots/com.apple.mobileslideshow
有对应截图文件UIApplicationAutomaticSnapshotDefault-Portrait.jpg：
/Users/crifan/Library/Application Support/iPhone Simulator/5.1/Applications/58D98889-3767-4B2B-B883- 88C04345A8A3/Library/Caches/Snapshots/crifan.com.BirdWatching
下面有对应的截图文件UIApplicationAutomaticSnapshotDefault-Portrait.jpg：
