Question

I’m having serious problem whenever I pause the game, since most of my performSelector: has delay, so it will not execute immediately, but thing goes bad if I’m pausing the game then the performSelector is still calling… How should I overcome this?

I know there is one function under NSObject to cancel all the requests but that’s not really what i’m looking for because I want the method to continue execute if the player resume the game.

Answer 1

According to cocos2d Best Practices you should not use performSelector:afterDelay directly but use cocos2d scheduler instead:

• 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 CCLayer (CCScene, CCSprite, CCNode) 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

Here’s how you schedule your method (assuming self is a CCNode):

[self schedule: @selector(tick2:) interval:0.5];

Don’t forget to unschedule it in -tick2: if you want to call it once.