The code above has correct syntax highlighting in Xcode 7. It is mix of Obj-C + Swift:
I\'ve updated project to support
As others have stated above - if I create a new tab ..or 4 then close the tab that usually does it. Sometimes commenting out a line then immediately uncommenting does the trick as well. I got tired of using several keys to accompolish this and made a simple AppleScript to do it for me.
Create a Automator 'service' and add this script to it. In System Preferences under Keyboard -> Shortcuts -> Services find your new service and assign it to an empty function key (I used F1) and now you have a 1 key fix!
on run {input, parameters}
tell application "Xcode"
activate
tell application "System Events" to keystroke "t" using command down
delay (0.5)
tell application "System Events" to keystroke "w" using command down
delay (0.5)
tell application "System Events" to keystroke "/" using command down
delay (0.5)
tell application "System Events" to keystroke "/" using command down
delay (0.5)
end tell
return input
end run