Hi All,
I had another question about core animation. I am trying to animate my view's
frame size so that it gets smaller - and then in the same animation goes back
to the same size. I was able to get it to succesfully animate to a smaller
size - but am having difficulty with getting to work using CAKeyFrameAnimation.
I tried doing it in a group - but when I try to change the alpha value nothing
happens to the frame size. I tried to follow some examples Apple had - but to
no avail. The view that I am calling this code on is layer backed (set in
interface builder).
Thanks,
Mazen Abdel-Rahman
Below is my code:
NSRect newFrame = [[subViewController view] frame];
NSRect oldFrame = [[subViewController view] frame];
newFrame.size.width = newFrame.size.width - 30;
[NSAnimationContext beginGrouping];
CAKeyframeAnimation * anim = [CAKeyframeAnimation animation];
[anim setKeyPath:@"frame"];
NSArray * frameValues = [NSArray arrayWithObjects:
[NSValue
valueWithRect:oldFrame],
[NSValue
valueWithRect:newFrame],
[NSValue
valueWithRect:oldFrame], nil];
[anim setValues:frameValues];
NSArray * times = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:0.0f],
[NSNumber numberWithFloat:0.8f],
[NSNumber numberWithFloat:1.0f],nil];
[anim setKeyTimes:times];
CABasicAnimation *alphaAnim = [CABasicAnimation
animationWithKeyPath:@"alphaValue"];
[alphaAnim setFromValue:[NSNumber numberWithFloat:0.0f]];
[alphaAnim setToValue:[NSNumber numberWithFloat:1.0f]];
CAAnimationGroup * group= [CAAnimationGroup animation];
[group setAnimations:[NSArray arrayWithObjects:anim,alphaAnim,nil]];
NSDictionary * dict = [NSDictionary dictionaryWithObject:group
forKey:@"alphaValue"];
[[subViewController view] setAnimations:dict];
[[[subViewController view]animator] setAlphaValue:1.0];
[NSAnimationContext endGrouping];
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