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

In cocos 2d there is default update section for timer.

Try this:

[self schedule:@selector(update:)];
- (void)update:(ccTime)dt {
}