Question

If the user has not touched the screen for a specific time, I have to do a particular action. How I can do that in Cocos2d?

Answer 1

You could subclass your UIView and override - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event.

This method is called very early in the responder chain and allows you to detect a touch anywhere in the view.

 - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
     UIView *result = [super hitTest:point withEvent:event];
     ....
     return result;
 }

Once you detect a touch, you reset a timer, so that either a new touch event comes in before the timer fires, or the timer fires.

When the timer fires, you execute your particular action.

A similar approach can be followed by subclassing UIWindow and then overriding -(void)sendEvent:(UIEvent *)event. This has the advantage of not being related to a view, but to the whole window of your app and being called even earlier in the responder chain.

 - (void)sendEvent:(UIEvent *)event {
     if ([self thisIsTheTouchIwaitedFor:event])
         [self resetWaitTimer];
     [super sendEvent:event];
 }