cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   SDKTutor
   Member

   Hi!. I'm trying to learn CAAnimation, and am having some trouble. I have searched all over the place for tutorials on it and how to use it for the past 2 days, have had little to no success. Here's some code I have found, but when I try to use it, it doesn't work. Can you tell me what's wrong?

   BTW, I am trying to do this to a UIImageView.

   CABasicAnimation *theAnimation;
   	theAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
   	theAnimation.duration=3.0;
   	theAnimation.repeatCount=2;
   	theAnimation.autoreverses=YES;
   	theAnimation.fromValue = [NSNumber numberWithFloat:1.0];
   	theAnimation.toValue = [NSNumber numberWithFloat:.2];
   	[[self layer] addAnimation:theAnimation forKey:@"animateOpacity"];
   	[[self layer] animationForKey:@"animateOpacity"];

   This "should" make it flicker, but it doesn't.

   Also, do you know how I would use CAAnimation to move an object to a point? I really need your help! Thanks in advance!

   Posted 1 year ago #
2. 

   SDKTutor
   Member

   Anyone? Anyone even know a little about CAAnimation?

   Posted 1 year ago #
3. 

   clark_obrien
   Member

   I think you also need to set removeOnCompletion to false;

   Posted 1 year ago #
4. 

   clark_obrien
   Member

   No move an object so something like
   [animatioin setToValue:[NSValue valueWithPoint:NSMakePoint(0.0,0.1)]

   Posted 1 year ago #
5. 

   sunsu
   Member

   Why are you using CABasicAnimation and not Cocos2d animations/actions?

   Posted 1 year ago #
6. 

   SDKTutor
   Member

   @sunsu: This topic was posted in iPhone SDK/ Cocoa, not cocos2d graphics.

   Ok, so I got it working, now I just need to figure out how to make the object stay in the spot it animated to. This is my code now:
   

   CABasicAnimation *theAnimation;
   	theAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
   	theAnimation.duration = 1;
   	theAnimation.repeatCount = 1;
   	theAnimation.removedOnCompletion = TRUE;
   	[theAnimation setToValue:[NSValue valueWithCGPoint:CGPointMake(480, 320)]];
   	[self.layer addAnimation:theAnimation forKey:@"animationPosition"];

   This code will animate the object to the certain spot, but once it is done, it will immediately go back to where it began. Anyone now how to fix this?

   Posted 1 year ago #
7. 

   SDKTutor
   Member

   Again, anyone?

   Posted 1 year ago #
8. 

   CJ
   Moderator

   @SDKTutor I always wanted to try using the CAAnimation stuff with custom objects (cocos nodes). Can you post a working demo project? I'll take a look into your issue as well.

   Thanks :)

   Posted 1 year ago #
9. 

   SDKTutor
   Member

   @CJ: Sure. Except you can't use it with cocos2d. It would take some serious mod-ing of cocos2d to allow that. This is just for UIKit stuff, not cocos2d.

   Posted 1 year ago #

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