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⚒ Tools " Techniques # Teamwork

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♻ Tweaks & iterations

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% Smooth, flexible workflows

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% Smooth, flexible workflows

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⚒ Tools " Techniques

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& Scene-based % View-based ' Frame-based

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SpriteKit Apple’s framework for 2D game development

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' SKScene

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( SKSpriteNode ' SKScene

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Hierarchy matching the Sketch file )

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Hierarchy matching the Sketch file ) * SKTextureAtlas + .spriteatlas

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, SKAction

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Jump let jumpAction = SKAction.sequence([ .moveBy(x: 0, y: 3, duration: 0.1), .moveBy(x: 0, y: -3, duration: 0.1) ])

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Jump let jumpAction = SKAction.sequence([ .moveBy(x: 0, y: 3, duration: 0.1), .moveBy(x: 0, y: -3, duration: 0.1) ]) let carAction = SKAction.sequence([ jumpAction .wait(forDuration: 2) ])

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Jump let jumpAction = SKAction.sequence([ .moveBy(x: 0, y: 3, duration: 0.1), .moveBy(x: 0, y: -3, duration: 0.1) ]) let carAction = SKAction.sequence([ jumpAction .wait(forDuration: 2) ]) carNode.run(.repeatForever(carAction))

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Jump let jumpAction = SKAction.sequence([ .moveBy(x: 0, y: 3, duration: 0.1), .moveBy(x: 0, y: -3, duration: 0.1) ]) let wheelAction = SKAction.sequence([ .rotate(byAngle: .pi * 2, duration: 1.5) jumpAction ]) wheelNode.run(.repeatForever(wheelAction)) Rotate & jump let carAction = SKAction.sequence([ jumpAction .wait(forDuration: 2) ]) carNode.run(.repeatForever(carAction))

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Jump let jumpAction = SKAction.sequence([ .moveBy(x: 0, y: 3, duration: 0.1), .moveBy(x: 0, y: -3, duration: 0.1) ]) let wheelAction = SKAction.sequence([ .rotate(byAngle: .pi * 2, duration: 1.5) jumpAction ]) wheelNode.run(.repeatForever(wheelAction)) Rotate & jump let carAction = SKAction.sequence([ jumpAction .wait(forDuration: 2) ]) carNode.run(.repeatForever(carAction))

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) Great for complex stand-alone scenes - Easy to compose actions to build animations . Create hierarchies matching the asset structure ♻ Actions can be reused and their parameters can be easily tweaked SpriteKit

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Button Label ' % View-based animations

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UIView.animate(withDuration: 0.3) { button.frame.size = CGSize(width: 200, height: 200) } Button

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UIView.animate(withDuration: 0.3) { button.frame.size = CGSize(width: 200, height: 200) } Button

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button.alpha = 0 UIView.animate(withDuration: 0.3, animations: { button.alpha = 1 }, completion: { _ in UIView.animate(withDuration: 0.3) { button.frame.size = CGSize(width: 200, height: 200) } })

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We can do better! /

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Button Button Button

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button.animate([ .fadeIn(duration: 0.3), .scale(to: CGSize(width: 200, height: 200), duration: 0.3) ]) Button Button Button

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struct Animation { var duration: TimeInterval var closure: (UIView) -> Void }

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struct Animation { var duration: TimeInterval var closure: (UIView) -> Void } extension Animation { } static func fadeIn(duration: TimeInterval) -> Animation { return Animation(duration: duration, closure: { $0.alpha = 1 }) } static func scale(to size: CGSize, duration: TimeInterval) -> Animation { return Animation(duration: duration, closure: { $0.frame.size = size }) }

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extension UIView { func animate(_ animations: [Animation]) { guard !animations.isEmpty else { return } var animations = animations let animation = animations.removeFirst() UIView.animate(withDuration: animation.duration, animations: { animation.closure(self) }, completion: { _ in self.animate(animations) }) } }

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extension UIView { func animate(_ animations: [Animation]) { guard !animations.isEmpty else { return } var animations = animations let animation = animations.removeFirst() UIView.animate(withDuration: animation.duration, animations: { animation.closure(self) }, completion: { _ in self.animate(animations) }) } } Exit condition

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extension UIView { func animate(_ animations: [Animation]) { guard !animations.isEmpty else { return } var animations = animations let animation = animations.removeFirst() UIView.animate(withDuration: animation.duration, animations: { animation.closure(self) }, completion: { _ in self.animate(animations) }) } } Exit condition Take out the next animation

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extension UIView { func animate(_ animations: [Animation]) { guard !animations.isEmpty else { return } var animations = animations let animation = animations.removeFirst() UIView.animate(withDuration: animation.duration, animations: { animation.closure(self) }, completion: { _ in self.animate(animations) }) } } Exit condition Take out the next animation Perform the animation

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extension UIView { func animate(_ animations: [Animation]) { guard !animations.isEmpty else { return } var animations = animations let animation = animations.removeFirst() UIView.animate(withDuration: animation.duration, animations: { animation.closure(self) }, completion: { _ in self.animate(animations) }) } } Exit condition Take out the next animation Perform the animation Recursively call the method

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iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = > ?

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iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = >

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burrito.animate([ .scale(to: burrito.frame.size * 1.5, duration: 0.3), .move(to: basket.center, duration: 0.3) ]) iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = >

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burrito.animate([ .scale(to: burrito.frame.size * 1.5, duration: 0.3), .move(to: basket.center, duration: 0.3) ]) burrito.animate(inParallel: [ .scale(to: burrito.frame.size * 0.5, duration: 0.3), .fadeOut(duration: 0.3) ]) iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = >

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burrito.animate([ .scale(to: burrito.frame.size * 1.5, duration: 0.3), .move(to: basket.center, duration: 0.3) ]) burrito.animate(inParallel: [ .scale(to: burrito.frame.size * 0.5, duration: 0.3), .fadeOut(duration: 0.3) ]) basket.animate([ .scale(to: basket.frame.size * 1.5, duration: 0.3), .scale(to: basket.frame.size, duration: 0.3) ]) iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = >

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burrito.animate([ .scale(to: burrito.frame.size * 1.5, duration: 0.3), .move(to: basket.center, duration: 0.3) ]) burrito.animate(inParallel: [ .scale(to: burrito.frame.size * 0.5, duration: 0.3), .fadeOut(duration: 0.3) ]) basket.animate([ .scale(to: basket.frame.size * 1.5, duration: 0.3), .scale(to: basket.frame.size, duration: 0.3) ]) badge.animate(.fadeIn(duration: 0.3)) iHungry 0 1 2 3 4 5 6 7 8 9 : ; < = > 1

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Demo

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' Frame-based animations @ & A

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Animation( name: "swordsman-moving-right", frameCount: 8, duration: 1.12 )

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Animation( name: "swordsman-moving-right", frameCount: 8, duration: 1.12 )

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Animation( name: "swordsman-moving-right", frameCount: 8, duration: 1.12 ) >100

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+ Graphics [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected]

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+ Graphics [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] + Swordsman + Moving + Right

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+ Graphics [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] + Swordsman + Moving + Right Duration.txt B

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+ Graphics [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] + Swordsman + Moving + Right Duration.txt B 1.12

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Animation( name: "Swordsman/Right/Moving", frameCount: 8, duration: 1.12 )

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Animation( name: "Swordsman/Right/Moving", frameCount: 8, duration: 1.12 ) Folder path

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Animation( name: "Swordsman/Right/Moving", frameCount: 8, duration: 1.12 ) Folder path Number of images

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Animation( name: "Swordsman/Right/Moving", frameCount: 8, duration: 1.12 ) Folder path Number of images Duration.txt

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, Script Script

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, Script Script Characters

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, Script Script + Folders Characters

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, Script Script + Folders Characters ⚡ Generate code

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+ Swordsman/Moving/Right [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] Duration.txt B Animation( name: "Swordsman/Right/Moving", frameCount: , duration: 1.12 ) 8

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+ Swordsman/Moving/Right [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] Duration.txt B Animation( name: "Swordsman/Right/Moving", frameCount: , duration: 1.12 ) [email protected] 9

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%

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% ⚒ Tools

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% D Organize ⚒ Tools

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% D Organize B Configs ⚒ Tools

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% , Scripts D Organize B Configs ⚒ Tools

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% , Scripts D Organize B Configs ⚒ Tools EF

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% , Scripts D Organize B Configs ⚒ Tools EF G H

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% , Scripts D Organize B Configs ⚒ Tools E F G H

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@johnsundell