Easy Animation at Cocoaheads Copenhagen

Slides from the Easy Animation talk at Cocoaheads Copenhagen

Transcript

1. Easy Animation Marin Todorov
2. Swift 2.0 Swift 2.0
4. Motivation
5. Motivation How would I improve the built-in animation APIs?
6. Goals * easier layer animations * easier animation sequences * layer spring animations
7. David Rönnqvist post on objc.io
8. UIView.animateWithDuration(1.0, animations: { }) Create an animation context Destroy the animation context Original animations block Animate layer properties
9. CALayer() UIView() layer layer view delegate
10. animations block view.alpha = 0.5 layer.position.y = 200 layer.cornerRadius = 50 UIView.actionForLayer(layer, “alpha”) CAAnimation UIView.actionForLayer(layer, “position.y”) CAAnimation UIView.actionForLayer(layer, “cornerRadius”) NSNull
11. layer.cornerRadius = 50 CABasicAnimation(keyPath: “cornerRadius”) toValue = 50 fromValue = <current value>
12. Layer animations
13. Goals * easier layer animations * easier animation sequences * layer spring animations
14. UIView.animationWithDuration(1.0, animations: {
 first animation
 }).animateWithDuration(1.0, {
 second animation
 })… etc …
15. Sequence animations
16. Goals * easier layer animations * easier animation sequences * layer spring animations
17. UIKit.animateWithDuration(…) CABasicAnimation UIKit.animateWithDuration(… springDamping: , springInitialVelocity: …) CASpringAnimation on iOS9 RBBSpringAnimation on iOS8
18. Feelings
19. Gotchas * Premature completion!
 * What is a damped harmonic oscillator?
 * Retain/release #$!
20. What’s next? UIView.animateWithDuration(1.0, animations: { }) self.myButton.animationPath = CGPath(…) self.myButton.transform.scale.x = 1.2 self.myButton.rotation = M_PI_4
21. How bout smth crazy? UIView.animateWithDuration(1.0, animations: { }) self.myButton.center.x = 20 Update the view constraints and thus make this work on AL? Whaaaa?
22. Marin Todorov Thank you! www.underplot.com