File list (Check if you may need any files):
demo.xcodeproj
..............\project.pbxproj
__MACOSX
........\demo.xcodeproj
........\..............\._project.pbxproj
demo.xcodeproj\project.xcworkspace
..............\...................\contents.xcworkspacedata
__MACOSX\demo.xcodeproj\project.xcworkspace
........\..............\...................\._contents.xcworkspacedata
demo.xcodeproj\project.xcworkspace\xcuserdata
..............\...................\..........\ericwang.xcuserdatad
..............\...................\..........\....................\UserInterfaceState.xcuserstate
__MACOSX\demo.xcodeproj\project.xcworkspace\xcuserdata
........\..............\...................\..........\ericwang.xcuserdatad
........\..............\...................\..........\....................\._UserInterfaceState.xcuserstate
........\..............\...................\..........\._ericwang.xcuserdatad
demo.xcodeproj\project.xcworkspace\xcuserdata\wangying.xcuserdatad
..............\...................\..........\....................\UserInterfaceState.xcuserstate
__MACOSX\demo.xcodeproj\project.xcworkspace\xcuserdata\wangying.xcuserdatad
........\..............\...................\..........\....................\._UserInterfaceState.xcuserstate
........\..............\...................\..........\._wangying.xcuserdatad
........\..............\...................\._xcuserdata
........\..............\._project.xcworkspace
demo.xcodeproj\xcuserdata
..............\..........\ericwang.xcuserdatad
..............\..........\....................\xcschemes
..............\..........\....................\.........\demo.xcscheme
__MACOSX\demo.xcodeproj\xcuserdata
........\..............\..........\ericwang.xcuserdatad
........\..............\..........\....................\xcschemes
........\..............\..........\....................\.........\._demo.xcscheme
demo.xcodeproj\xcuserdata\ericwang.xcuserdatad\xcschemes\xcschememanagement.plist
__MACOSX\demo.xcodeproj\xcuserdata\ericwang.xcuserdatad\xcschemes\._xcschememanagement.plist
........\..............\..........\....................\._xcschemes
........\..............\..........\._ericwang.xcuserdatad
demo.xcodeproj\xcuserdata\wangying.xcuserdatad
..............\..........\....................\xcschemes
..............\..........\....................\.........\demo.xcscheme
__MACOSX\demo.xcodeproj\xcuserdata\wangying.xcuserdatad
........\..............\..........\....................\xcschemes
........\..............\..........\....................\.........\._demo.xcscheme
demo.xcodeproj\xcuserdata\wangying.xcuserdatad\xcschemes\xcschememanagement.plist
__MACOSX\demo.xcodeproj\xcuserdata\wangying.xcuserdatad\xcschemes\._xcschememanagement.plist
........\..............\..........\._wangying.xcuserdatad
........\..............\._xcuserdata