MacOS版计算器

按照斯坦福老爷子iOS10课程做的一个计算器，这个是MacOS版的，可以在电脑上运行。

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-10-10 19:26  Calculator\
     目录           0  2017-10-10 18:55  Calculator\Calculator\
     文件        2156  2017-10-10 18:54  Calculator\Calculator\ViewController.swift
     目录           0  2017-10-21 13:30  __MACOSX\
     目录           0  2017-10-21 13:30  __MACOSX\Calculator\
     目录           0  2017-10-21 13:30  __MACOSX\Calculator\Calculator\
     文件         176  2017-10-10 18:54  __MACOSX\Calculator\Calculator\._ViewController.swift
     文件        2948  2017-09-19 13:17  Calculator\Calculator\OperatResult.swift
     文件        3338  2017-09-19 13:17  __MACOSX\Calculator\Calculator\._OperatResult.swift
     目录           0  2017-10-10 18:54  Calculator\Calculator\Assets.xcassets\
     目录           0  2017-09-14 14:48  Calculator\Calculator\Assets.xcassets\AppIcon.appiconset\
     文件         903  2017-09-14 14:48  Calculator\Calculator\Assets.xcassets\AppIcon.appiconset\Contents.json
     目录           0  2017-10-21 13:30  __MACOSX\Calculator\Calculator\Assets.xcassets\
     目录           0  2017-10-21 13:30  __MACOSX\Calculator\Calculator\Assets.xcassets\AppIcon.appiconset\
     文件         171  2017-09-14 14:48  __MACOSX\Calculator\Calculator\Assets.xcassets\AppIcon.appiconset\._Contents.json
     文件          62  2017-10-10 18:53  Calculator\Calculator\Assets.xcassets\Contents.json
     目录           0  2017-09-19 13:05  Calculator\Calculator\base.lproj\
     文件       80750  2017-09-19 13:05  Calculator\Calculator\base.lproj\Main.storyboard
     目录           0  2017-10-21 13:30  __MACOSX\Calculator\Calculator\base.lproj\
     文件        1133  2017-09-19 13:05  __MACOSX\Calculator\Calculator\base.lproj\._Main.storyboard
     文件         512  2017-09-19 12:37  Calculator\Calculator\AppDelegate.swift
     文件         344  2017-09-19 12:37  __MACOSX\Calculator\Calculator\._AppDelegate.swift
     文件        1031  2017-09-14 14:48  Calculator\Calculator\Info.plist
     目录           0  2017-09-14 19:40  Calculator\Calculator.xcodeproj\
     文件       11032  2017-09-14 19:40  Calculator\Calculator.xcodeproj\project.pbxproj
     目录           0  2017-09-14 14:48  Calculator\Calculator.xcodeproj\xcuserdata\
     目录           0  2017-09-19 13:00  Calculator\Calculator.xcodeproj\xcuserdata\czx.xcuserdatad\
     目录           0  2017-09-19 13:01  Calculator\Calculator.xcodeproj\xcuserdata\czx.xcuserdatad\xcdebugger\
     文件          91  2017-09-19 13:01  Calculator\Calculator.xcodeproj\xcuserdata\czx.xcuserdatad\xcdebugger\Breakpoints_v2.xcbkptlist
     目录           0  2017-09-14 14:48  Calculator\Calculator.xcodeproj\xcuserdata\czx.xcuserdatad\xcschemes\
     文件        3339  2017-09-14 14:48  Calculator\Calculator.xcodeproj\xcuserdata\czx.xcuserdatad\xcschemes\Calculator.xcscheme
............此处省略9个文件信息