AppleScript that tells Xcode to do a "Clean" and then a "Build"

Clean and Build.applescript

tell application "Xcode"
	tell active workspace document
		set actionResult to clean
		repeat
			if completed of actionResult is true then
				exit repeat
			end if
			delay 0.5
		end repeat
		
		set actionResult to build
		repeat
			if completed of actionResult is true then
				exit repeat
			end if
			delay 0.5
		end repeat
	end tell
end tell

Tip: In Script Editor > Preferences > General, enable the Script Menu, and then put this script in your ~/Library/Scripts/Applications/Xcode directory so it will appear in the script menu when Xcode is active.