the project is about table view add sub change selected

TestTableView.xcodeproj
.......................\project.pbxproj
__MACOSX
........\TestTableView.xcodeproj
........\.......................\._project.pbxproj
TestTableView.xcodeproj\project.xcworkspace
.......................\...................\contents.xcworkspacedata
__MACOSX\TestTableView.xcodeproj\project.xcworkspace
........\.......................\...................\._contents.xcworkspacedata
TestTableView.xcodeproj\project.xcworkspace\xcuserdata
.......................\...................\..........\zhangjingshun.xcuserdatad
.......................\...................\..........\.........................\UserInterfaceState.xcuserstate
__MACOSX\TestTableView.xcodeproj\project.xcworkspace\xcuserdata
........\.......................\...................\..........\zhangjingshun.xcuserdatad
........\.......................\...................\..........\.........................\._UserInterfaceState.xcuserstate
........\.......................\...................\..........\._zhangjingshun.xcuserdatad
........\.......................\...................\._xcuserdata
........\.......................\._project.xcworkspace
TestTableView.xcodeproj\xcuserdata
.......................\..........\zhangjingshun.xcuserdatad
.......................\..........\.........................\xcdebugger
.......................\..........\.........................\..........\Breakpoints.xcbkptlist
__MACOSX\TestTableView.xcodeproj\xcuserdata
........\.......................\..........\zhangjingshun.xcuserdatad
........\.......................\..........\.........................\xcdebugger
........\.......................\..........\.........................\..........\._Breakpoints.xcbkptlist
........\.......................\..........\.........................\._xcdebugger
TestTableView.xcodeproj\xcuserdata\zhangjingshun.xcuserdatad\xcschemes
.......................\..........\.........................\.........\TestTableView.xcscheme
__MACOSX\TestTableView.xcodeproj\xcuserdata\zhangjingshun.xcuserdatad\xcschemes
........\.......................\..........\.........................\.........\._TestTableView.xcscheme
TestTableView.xcodeproj\xcuserdata\zhangjingshun.xcuserdatad\xcschemes\xcschememanagement.plist
__MACOSX\TestTableView.xcodeproj\xcuserdata\zhangjingshun.xcuserdatad\xcschemes\._xcschememanagement.plist
........\.......................\..........\.........................\._xcschemes
........\.......................\..........\._zhangjingshun.xcuserdatad
........\.......................\._xcuserdata

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