画像を並び替えて、１フレーム0.5秒の動画っぽく再生するiPhoneアプリのサンプルコードを描いてみます。
import UIKit
import SpriteKit
class ViewController: UIViewController {
weak var scene: SKScene?
weak var select : SKNode?
var origin : CGPoint = CGPointZero
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.setupScene()
self.createImageBox()
self.createAnimationScreen()
}
func setupScene() {
let sv = SKView(frame: self.view.bounds)
self.view.addSubview(sv)
let scene = SKScene(size: sv.frame.size)
scene.backgroundColor = UIColor(hue: 0.3, saturation: 0.5, brightness: 1, alpha: 1)
sv.presentScene(scene)
self.scene = scene
}
func createImageBox() {
let w = CGRectGetMaxX(self.view.bounds) / 6.0
for i in 0…5 {
let box = SKSpriteNode(color: UIColor(hue: 0.4, saturation: 0.2, brightness: 1, alpha: 1), size: CGSizeMake(w * 0.8, w * 0.8))
box.name = “box\(i)“
box.position = CGPointMake(CGFloat(i) * w + w/2.0, w/2.0)
self.scene?.addChild(box)
for j in 0…5 {
let x = w/3.5 * CGFloat(cos(Double(j) * M_PI / 3.0))
let y = w/3.5 * CGFloat(sin(Double(j) * M_PI / 3.0))
let dot = SKShapeNode(circleOfRadius: 8)
dot.position = CGPointMake(x, y)
dot.fillColor = j != i ? UIColor.clearColor() : UIColor(hue: CGFloat(i) * 0.15, saturation: 0.7, brightness: 1, alpha: 1)
dot.lineWidth = 2
dot.strokeColor = UIColor(hue: 0.5, saturation: 0.8, brightness: 1, alpha: 1)
box.addChild(dot)
}
}
}
func createAnimationScreen() {
let w = CGRectGetMaxY(self.view.bounds) / 2.0
let screen = SKSpriteNode(color: UIColor.blackColor(), size: CGSizeMake(w, w))
screen.name = “screen”
screen.position = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMaxY(self.view.bounds) * 0.6)
self.scene?.addChild(screen)
let playbtn = SKLabelNode(text: “play”)
playbtn.name = “play”
playbtn.fontSize = 50
screen.addChild(playbtn)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let p = touches.anyObject()!.locationInNode(self.scene)
let hit = self.scene!.nodeAtPoint(p)
if hit.name == “play” || hit.name == “screen” {
self.play()
} else if (hit.name?.hasPrefix(“box”) != nil) {
self.select = hit
self.origin = hit.position
}
}
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
let p = touches.anyObject()!.locationInNode(self.scene)
self.select?.position = p
}
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
if let target = self.select {
var intersect = false
self.scene?.enumerateChildNodesWithName(“box[0-9]”, usingBlock: { (node, bool) in
if target != node && target.intersectsNode(node) {
let buf = target.name
target.name = node.name
node.name = buf
target.runAction(SKAction.moveTo(node.position, duration: 0.2))
node.runAction(SKAction.moveTo(self.origin, duration: 0.2))
intersect = true
}
})
if !intersect {
target.runAction(SKAction.moveTo(self.origin, duration: 0.2))
}
self.select = nil
}
}
func play() {
let screen = self.scene!.childNodeWithName(“screen”)
var nodes = [SKNode]()
self.scene?.enumerateChildNodesWithName(“box[0-9]”, usingBlock: { (node, bool) -> Void in
nodes.append(node)
})
nodes.sort { $0.name < $1.name }
var textures = [SKTexture]()
for node in nodes {
if let t = self.scene?.view?.textureFromNode(node) {
textures.append(t)
}
}
let screenOverlay = SKSpriteNode()
let overlay = SKSpriteNode(texture: textures[0], size: screen!.frame.size)
overlay.position = screen!.position
self.scene?.addChild(overlay)
let animationFramesAction = SKAction.animateWithTextures(textures, timePerFrame: 0.5, resize: true, restore: false)
overlay.runAction(animationFramesAction, completion: {
overlay.runAction(SKAction.fadeOutWithDuration(0.2), completion: {overlay.removeFromParent()})
})
}
}