How Do You CAKeyframeAnimation Scale?

Question

I want to create an animation with several key frames. I want my Layer (a button in this case) to scale up to 1.5 then down to 0.5 then up to 1.2 then down to 0.8 then 1.0.<

Answer 1

I don't know if you can use a CAKeyframeAnimation for animating the scale of a UIView, but you can do it with a CABasicAnimation and setting the fromValue and toValue properties, and using that to animate the transform property:

- (CAAnimation*)monInAnimation 
{
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"];
    animation.fromValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)];
    animation.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(3.0, 3.0, 3.0)];
    [animation setDuration:1.5];
    [animation setAutoreverses:YES];
    return animation;
}

- (IBAction)monBtnIn 
{
    [monButton.layer addAnimation:[self monInAnimation] forKey:@"transform"];
}