在循环中运行一个延迟

first off I'm just an airline pilot coding on my dead hours sitting in hotel rooms so pardon my ignorance. I'm writing this Blackjack Game using Obj. C and Cocos2D. for iOS My problem is as follows: When I hit stand I want my code to draw cards for the dealer until it reaches 17. I managed to do that but as soon as I insert a delay in the loop it stop working. I have tried numerous ways to implement the delay such as :first off I'm just an airline pilot coding on m