How can I create a count down timer for cocos2d?

Question

I am developing a 2D iPhone game by using cocos2d. I need a countdown timer. How can I create a count down timer in cocos2d?

Answer 1

http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:best_practices

• Try NOT to use Cocoa’s NSTimer. Instead use cocos2d’s own scheduler.
• If you use cocos2d scheduler, you will have:
  • automatic pause/resume.
  • when the Layer (Scene, Sprite, CocosNode) enters the stage the timer will be automatically activated, and when it leaves the stage it will be automatically deactivated.
  • Your target/selector will be called with a delta time...