Question

My problem is, I did coding for a sprite. It should change it should change it’s image from( 1, 2, 3). It should look like count down time to start a game. 1, 2, 3 are 3 png images. But the images are not displayed in equal intervals of time. I mean time between (1 – 2), (2 – 3) is not same. It is random. Please help me with my problem. Help me if there is better solution than what I am doing.(My animation should be like, before any game starts we see count down 1 then 2 then 3 then GO).

-(id)init
{
if((self = [super init]))
{
[[CCDirector sharedDirector] setAnimationInterval:60.0/60];
[[CCDirector sharedDirector] setDisplayFPS:NO];

    CCAnimation* numberAnimation = [CCAnimation animationWithName:@"countDown" delay: 60.0/60];
    for( int i=1;i<4;i++)
        [numberAnimation addFrameWithFilename: [NSString stringWithFormat:@"number_%02d.png", i]];

    id numberAction = [CCAnimate actionWithAnimation: numberAnimation restoreOriginalFrame:NO];
    id action2 = [CCFadeOut actionWithDuration:0.5f];


    CCSprite *number;
    number = [CCSprite spriteWithFile:@"number.png"];

….

}
}

Answer 1

You’ll have to update some of the classes used in this article a developer on my team wrote since it was written for Cocos2D 0.8.2 but I think this should do the trick for you…

http://getsetgames.com/2009/08/05/improving-the-performance-of-animating-sprites-in-cocos2d/

From a quick looks like you need to make the following changes…

• IntervalAction change to CCIntervalAction
• CocosAnimation change to CCAnimation (I think?)
• CocosNodeFrames change to CCNodeFrames (I think?)

You’ll have to double check the Cocos2D 0.99 release notes. It details all the class names you’ll need.