MCE^3 - Marin Todorov - Building Swift Libraries for iOS
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The document discusses building Swift libraries for iOS, focusing on improving the built-in animation APIs. It outlines goals for easier layer animations, animation sequences, and introduces techniques for UIView and CALayer animations. Various animation contexts and code examples are provided to illustrate these concepts effectively.
MCE^3 - Marin Todorov - Building Swift Libraries for iOS
- 1. Building Swift Libraries for iOS Marin Todorov
- 6. Pure
- 11. 15 projects —————— 5 w/ views 9 w/ layers 1 w/ pop
- 14. Motivation How would I improve the built-in iOS animation APIs? 🤔
- 15. Goals * easier layer animations * easier animation sequences * layer spring animations
- 17. UIView.animateWithDuration(1.0, animations: { }) Create an animation context Destroy the animation context Original animations block Animate layer properties
- 18. 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
- 19. layer.cornerRadius = 50 CABasicAnimation(keyPath: “cornerRadius”) toValue = 50 fromValue = <current value> CALayerDelegateCALayer
- 20. Layer animations
- 21. Goals * easier layer animations * easier animation sequences * layer spring animations
- 22. UIView.animateWithDuration(1.0, animations: { first animation }).animateWithDuration(1.0, { second animation })… etc … Ideal Pseudo Code
- 23. Actual Code
- 25. Goals * easier layer animations * easier animation sequences * layer spring animations
- 26. UIKit.animateWithDuration(…) CABasicAnimation UIKit.animateWithDuration(… springDamping: , springInitialVelocity: …) CASpringAnimation on iOS9 RBBSpringAnimation on iOS8 Basic vs Spring Animations
- 27. Gotchas * Premature completion! * What is a damped harmonic oscillator? * Retain/release #$!