Count down timer

I need a count dow开发者_开发知识库n timer starting from 5 min.

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Have a look here : http://www.iphonedevsdk.com/forum/iphone-sdk-development/7590-touch-event-countdown-timer.html or here http://www.servin.com/iphone/iPhone-Timers-and-Animated-Views.html

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Look at NSTimer, particularly the method:

+timerWithTimeInterval:target:selector:userInfo:repeats:

If you want someone to write you an application, feel free to get in touch with me and I'll quote you a price on the source code.