xcode 9快捷键

command+shift + j 做边跳转到指定类
commond+fn+m 模拟器最小化
ctr+shift+电源键 黑屏
ctr+i 代码格式化
commond+shift+o 搜索类名

http://www.cocoachina.com/ios/20160304/15558.html

command control <- ->前进或者后退

as 格式化 command+option+l