caanimation – Tarik Billa

How can I create an CABasicAnimation for multiple properties?

September 17, 2023 by Tarik

You can create an CAAnimationGroup and customize the duration and timing function on it. Then you create all your CABasicAnimations, set their to value and add them to the animation group. Finally, you add the animation group to the layer that you are animating. Here an example: CABasicAnimation *makeBiggerAnim=[CABasicAnimation animationWithKeyPath:@”cornerRadius”]; makeBiggerAnim.fromValue=[NSNumber numberWithDouble:20.0]; makeBiggerAnim.toValue=[NSNumber numberWithDouble:40.0]; CABasicAnimation … Read more

CATransaction completion being called immediately

April 26, 2023 by Tarik

I’m not sure if this really is the correct fix, but by setting the completion-block before adding the animation for the layer, the completion-block is consistently called at the correct time. [CATransaction begin]; [CATransaction setCompletionBlock:completionBlock]; [self.view.layer addAnimation:self.dropAndBounceAnimation forKey:@”appearance”]; [CATransaction commit];

UIView animation vs CALayers

February 16, 2023 by Tarik

Use views for control and layers for eye candy. Layers don’t receive events so it’s easier to use a view for those cases, but when you want to animate a sprite or backgrounds, etc., layers make sense. Events pass right through layers to the backing view so you can have a pretty visual representation without … Read more

Animate text change in UILabel

November 20, 2022 by Tarik

I wonder if it works, and it works perfectly! Objective-C [UIView transitionWithView:self.label duration:0.25f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{ self.label.text = rand() % 2 ? @”Nice nice!” : @”Well done!”; } completion:nil]; Swift 3, 4, 5 UIView.transition(with: label, duration: 0.25, options: .transitionCrossDissolve, animations: { [weak self] in self?.label.text = (arc4random()() % 2 == 0) ? “One” : “Two” }, … Read more