How to stop a repeating layer animation or switch to another one?

Question

Hi
I have set up CAKeyframeAnimation as follows. Is there any way to make it to switch to another animation at the press of a button? I figure I need to disable or stop the animation first before assigning another CAKeyframeAnimation or CABasicAnimation, but I could not figure out a way to do this. I have tried removing the animation from the layers using 'removeAllAnimations" when a button is pressed, the animation did stop, but the images jump back to the original state. Changing the fillMode to kCAFillModeForwards will not help since the animation did not complete.
Thanks in advance,
aobs
----- Code -----
\[CATransaction begin\];
\[CATransaction setAnimationTimingFunction:\[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear\]\];
\[CATransaction setValue:\[NSNumber numberWithFloat:2.0f\] forKey:kCATransactionAnimationDuration\];
// Assigning animation to the 10 layers.
\[thisLayer1 addAnimation:\[self scrollAnimation:layerNumber\] forKey@"customScrollAnimation"\];
\[CATransaction commit\];
-(CAKeyframeAnimation *)scrollAnimation:(NSInteger)layerNumber {
CGMutablePathRef animationPath = CGPathCreateMutable();
// Create animationPath and the keyTimes array.
CAKeyframeAnimation *movePositionAnimation =
\[CAKeyframeAnimation animationWithKeyPath:@"position"\];
movePositionAnimation.path = animationPath;
movePositionAnimation.keyTimes = \[NSArray arrayWithArray:keyTimes\];
movePositionAnimation.repeatCount = 50;
movePositionAnimation.removedOnCompletion = NO;
movePositionAnimation.fillMode = kCAFillModeForwards;
CGPathRelease(animationPath);
return movePositionAnimation;
--

Answer 1

Restart with the Shift key held down, log in, and delete it or remove it from the list of login items for your user account in the Users & Groups pane of System Preferences.
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