Using CAKeyFrameAnimation to animate images in a CALayer

CALayer.m

//Create the layer
			layer = [CALayer layer];
//Configure the animation			
			animation = [CAKeyframeAnimation animationWithKeyPath:@"contents"];
			
			[animation setCalculationMode:kCAAnimationDiscrete];
			
			[animation setDuration:2.0f];
			
			[animation setRepeatCount:HUGE_VALF];
			
			[animation setValues:/* your NSArray of CGImageRefs*/];

//Add the animation to the layer			
			[layer addAnimation:animation
						 forKey:@"contents"
			 ];
			
			[layer setFrame:/* The frame of the layer*/];
			
//Add to the super layer
			[parentLayer addSublayer:layer];

Note that each CGImageRef needs to be casted to an id:

    [animationFrames addObject:(id)[uiImageObject CGImage]];

thanks for this gist! my little hero is now an animated layer :)

Thanks, it works. And the [animation setValues: /**/]; just like this:

[animation setValues:[NSArray arrayWithObjects:(id)[UIImage imageNamed:@"i1"].CGImage, (id)[UIImage imageNamed:@"i2"].CGImage, (id)[UIImage imageNamed:@"i3"].CGImage, nil]];