重置刷新OS X的打开方式菜单 | reset or refresh “Open With” Menu of OS X

Copy & paste from single line command string:

OR Same command string broken into multiple lines: [crayon-5e8f78fc 继续>

在用户配置中存储一个NSColor(UIColor) | Save a color in NSUserDefaults

For Objective C place like this.

To get back like this.

For Swift set like this [cra 继续>