IDA Pro出到5.3版了

http://www.hex-rays.com/idapro/

從新版的說明發現支援iphone的反組譯，難怪能解鎖

http://www.hex-rays.com/idapro/53/compare.shtml

The function arguments have been found and correctly labeled 

很讚的啦，不然還要自己標參數形態