进入到这里之后 按住 option 键 就会出来 到 资源库的选项了 因为 Library资源库是隐藏的文件夹
里面有DerivedData和Snapshots两个文件夹，删除里面文件就可以了
2.(Xcode 4.2 will show you the Derived Data folder: choose Window > Organizer and switch to the Projects tab. Click the right-arrow to the right of the Derived Data folder name.)
In the simulator, choose iOS Simulator > Reset Content and Settings.
3. 怎么用命令清除xcode 里面的svn信息
find . -name '.svn' | xargs rm -rf