objective－c的计算器

简易计算器，用objective－c实现的

 属性            大小     日期    时间   名称
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     目录           0  2013-03-12 10:12  Calculator.xcodeproj\
     文件       20813  2013-03-12 10:12  Calculator.xcodeproj\project.pbxproj
     目录           0  2013-03-18 19:12  __MACOSX\
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\
     文件         180  2013-03-12 10:12  __MACOSX\Calculator.xcodeproj\._project.pbxproj
     目录           0  2013-03-12 09:54  Calculator.xcodeproj\project.xcworkspace\
     文件         155  2013-03-12 09:54  Calculator.xcodeproj\project.xcworkspace\contents.xcworkspacedata
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\project.xcworkspace\
     文件         180  2013-03-12 09:54  __MACOSX\Calculator.xcodeproj\project.xcworkspace\._contents.xcworkspacedata
     目录           0  2013-03-12 09:54  Calculator.xcodeproj\project.xcworkspace\xcuserdata\
     目录           0  2013-03-17 20:28  Calculator.xcodeproj\project.xcworkspace\xcuserdata\ibokan.xcuserdatad\
     文件       23567  2013-03-17 20:28  Calculator.xcodeproj\project.xcworkspace\xcuserdata\ibokan.xcuserdatad\UserInterfaceState.xcuserstate
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\project.xcworkspace\xcuserdata\
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\project.xcworkspace\xcuserdata\ibokan.xcuserdatad\
     文件         180  2013-03-17 20:28  __MACOSX\Calculator.xcodeproj\project.xcworkspace\xcuserdata\ibokan.xcuserdatad\._UserInterfaceState.xcuserstate
     文件         180  2013-03-17 20:28  __MACOSX\Calculator.xcodeproj\project.xcworkspace\xcuserdata\._ibokan.xcuserdatad
     文件         180  2013-03-12 09:54  __MACOSX\Calculator.xcodeproj\._project.xcworkspace
     目录           0  2013-03-12 09:54  Calculator.xcodeproj\xcuserdata\
     目录           0  2013-03-13 17:20  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\
     目录           0  2013-03-13 17:20  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcdebugger\
     文件          91  2013-03-13 17:20  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcdebugger\Breakpoints.xcbkptlist
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\xcuserdata\
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcdebugger\
     文件         180  2013-03-13 17:20  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcdebugger\._Breakpoints.xcbkptlist
     目录           0  2013-03-12 09:54  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\
     文件        3171  2013-03-12 09:54  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\Calculator.xcscheme
     目录           0  2013-03-18 19:12  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\
     文件         180  2013-03-12 09:54  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\._Calculator.xcscheme
     文件         482  2013-03-12 09:54  Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\xcschememanagement.plist
     文件         180  2013-03-12 09:54  __MACOSX\Calculator.xcodeproj\xcuserdata\ibokan.xcuserdatad\xcschemes\._xcschememanagement.plist
............此处省略1个文件信息