FlapyBird
Swift4写的经典小游戏SpriteKit版像素鸟
部分代码预览
import UIKit
import SpriteKit
class SKScrollableNode: SKSpriteNode {
var scrollSpeed:CGFloat = 1.0
convenience init(size:CGSize, imageNamed: String) {
self.init()
let texture = SKTexture.init(imageNamed: imageNamed)
self.texture = texture
self.size = size
var xpos:CGFloat = 0
while xpos < size.width * 2 {
let sub = SKSpriteNode.init(imageNamed: imageNamed)
sub.position = .init(x: xpos, y: 0)
sub.anchorPoint = .zero
sub.size = size
addChild(sub)
xpos += size.width
}
}
func enableScroll() {
let scroll = SKAction.run {
let array = self.children as! [SKSpriteNode]
for sub in array {
sub.position = .init(x: sub.position.x - self.scrollSpeed, y: sub.position.y)
if sub.position.x <= -self.size.width {
sub.position = .init(x: self.size.width * CGFloat(array.count - 1), y: sub.position.y)
}
}
}
let interval:TimeInterval = 1.0/60.0
let wait = SKAction.wait(forDuration: interval)
let sequence = SKAction.sequence([scroll, wait])
let forever = SKAction.repeatForever(sequence)
run(forever, withKey: "forever")
}
func disableScroll() {
removeAction(forKey: "forever")
}
}private func createPipes() {
let marginx:CGFloat = 65 + size.width
let width:CGFloat = 52.0
let totalHeight = size.height - floor.size.height
let maxPipeHeight = totalHeight - kPipeVoidGap - kMinPipeHeight
let count = pipesInScreen()
for i in 0 ..< count {
let xpos = marginx + (width + kPipeGapx) * CGFloat(i)
let topHeight = CGFloat(arc4random_uniform(UInt32(maxPipeHeight + 1 - kMinPipeHeight))) + kMinPipeHeight
let bottomHeight = totalHeight - kPipeVoidGap - topHeight
let top = Pipe.init(imageNamed: "pipe_top2")
top.type = .top
top.position = .init(x: xpos, y: size.height - topHeight)
top.anchorPoint = .zero
top.physicsBody = SKPhysicsBody.init(edgeLoopFrom: .init(x: 0, y: 0, width: width, height: topHeight))
top.physicsBody?.categoryBitMask = SKSpriteNodeBitMaskPipe
top.physicsBody?.contactTestBitMask = SKSpriteNodeBitMaskBird
addChild(top)
topPipes.append(top)
let bottom = Pipe.init(imageNamed: "pipe_bottom2")
bottom.position = .init(x: xpos, y: bottomHeight - bottom.size.height + floor.size.height)
bottom.anchorPoint = .zero
bottom.type = .bottom
bottom.physicsBody = SKPhysicsBody.init(edgeLoopFrom: .init(x: 0, y: bottom.size.height - bottomHeight, width: width, height: bottomHeight))
bottom.physicsBody?.categoryBitMask = SKSpriteNodeBitMaskPipe
bottom.physicsBody?.contactTestBitMask = SKSpriteNodeBitMaskBird
addChild(bottom)
bottomPipes.append(bottom)
}
}//MARK: -
//MARK: Update
extension GameScene {
override func update(_ currentTime: TimeInterval) {
guard stae == .playing else {
return
}
updatePipes()
updateScoreIfNeed()
}
private func updatePipes() {
if topPipes.count == 0 || bottomPipes.count == 0 {
return
}
let width:CGFloat = 52.0
let totalHeight = size.height - floor.size.height
let maxPipeHeight = totalHeight - kPipeVoidGap - kMinPipeHeight
let maxXpos = (width + kPipeGapx) * CGFloat(pipesInScreen())
for i in 0..<pipesInScreen() {
let topPipe = topPipes[i]
let bottomPipe = bottomPipes[i]
let topHeight = CGFloat(arc4random_uniform(UInt32(maxPipeHeight + 1 - kMinPipeHeight))) + kMinPipeHeight
topPipe.position = .init(x: topPipe.position.x - kPipeSpeed, y: topPipe.position.y)
if topPipe.position.x <= -size.width {
let xpos = maxXpos + topPipe.position.x
topPipe.position = .init(x: xpos, y: size.height - topHeight)
}
bottomPipe.position = .init(x: bottomPipe.position.x - kPipeSpeed, y: bottomPipe.position.y)
if bottomPipe.position.x <= -size.width {
let xpos = maxXpos + bottomPipe.position.x
let bottomHeight = totalHeight - kPipeVoidGap - topHeight
bottomPipe.position = .init(x: xpos, y: bottomHeight - bottomPipe.size.height + floor.size.height)
}
}
}
private func resetPipePosition() {
if topPipes.count == 0 || bottomPipes.count == 0 {
return
}
let marginx:CGFloat = 65 + size.width
let width:CGFloat = 52.0
let totalHeight = size.height - floor.size.height
let maxPipeHeight = totalHeight - kPipeVoidGap - kMinPipeHeight
for i in 0..<pipesInScreen() {
let top = topPipes[i]
let bottom = bottomPipes[i]
let xpos = marginx + (width + kPipeGapx) * CGFloat(i)
let topHeight = CGFloat(arc4random_uniform(UInt32(maxPipeHeight + 1 - kMinPipeHeight))) + kMinPipeHeight
let bottomHeight = totalHeight - kPipeVoidGap - topHeight
top.position = .init(x: xpos, y: size.height - topHeight)
bottom.position = .init(x: xpos, y: bottomHeight - bottom.size.height + floor.size.height)
}
}
private func updateScoreIfNeed() {
if scoreLb.isHidden {
scoreLb.isHidden = false
}
for p in topPipes {
let reference = p.position.x + p.size.width / 2
let birdx = bird.position.x
if birdx > reference && birdx < (reference + kPipeSpeed) {
score += 1
scoreLb.text = String(score)
run(scoreSound)
}
}
let best = UserDefaults.standard.integer(forKey: "best")
if score > UInt(best) {
UserDefaults.standard.set(Int(score), forKey: "best")
UserDefaults.standard.synchronize()
}
}
private func resetScore() {
score = 0
scoreLb.text = "0"
}
}//MARK: -
//MARK: Touches Began
extension GameScene {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if stae == .playing {
run(jumpSound)
bird.flap()
} else if stae == .gameover {
stae = .ready
lose.removeFromParent()
resetPipePosition()
bird.position = birdStartPosition
addTips()
bird.ready()
scoreLb.isHidden = true
resetScore()
} else {//ready
stae = .playing
removeTips()
bird.go()
createPipes()
}
}
}
//MARK: -
//MARK: SKPhysicsContactDelegate
extension GameScene {
func didBegin(_ contact: SKPhysicsContact) {
if stae == .gameover {
return
}
gameover()
}
}
//MARK: -
//MARK: Game Over
extension GameScene {
private func gameover() {
stae = .gameover
run(collsionSound)
shake()
showScore()
self.bird.die()
isUserInteractionEnabled = false
run(SKAction.wait(forDuration: 2), completion: {
self.bird.physicsBody = nil
self.isUserInteractionEnabled = true
})
}
private func shake() {
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate)
let animation = CABasicAnimation.init(keyPath: "position")
animation.duration = 0.06
animation.repeatCount = 4
animation.autoreverses = true
animation.fromValue = CGPoint.init(x: size.width/2 - 4.0, y: size.height/2)
animation.toValue = CGPoint.init(x: size.width/2 + 4.0, y: size.height/2)
view?.layer.add(animation, forKey: "position")
}
private func showScore() {
addChild(lose)
resultLb.text = String(score)
bestLb.text = String(UserDefaults.standard.integer(forKey: "best"))
var img = "bronze"
if score >= 40 {
img = "platinum"
}else if score >= 30 {
img = "gold"
}else if score >= 20 {
img = "silver"
}else if score >= 10 {
img = "bronze"
}else{
img = "bronze"
}
if img.count == 0 {
medal.isHidden = true
}else{
medal.isHidden = false
}
medal.texture = SKTexture.init(imageNamed: img)
}
}import UIKit
import SpriteKit
class Bird: SKSpriteNode {
private var flapAction:SKAction?
class func bird() -> Bird {
let b = Bird()
b.texture = SKTexture.init(imageNamed: "frog")
b.size = .init(width: 34, height: 28)
return b
}
//wait for start
func ready() {
var gapy:CGFloat = 0.0
var speedy:CGFloat = 1.0
let flashAction = SKAction.run {
if gapy > 4 {
speedy = -1.0
}else if gapy < -4 {
speedy = 1
}
self.position = CGPoint.init(x: self.position.x, y: self.position.y + gapy)
gapy += speedy
}
let interval:TimeInterval = 1.0/60.0
let wait = SKAction.wait(forDuration: interval)
let sequence = SKAction.sequence([flashAction, wait])
let foreverFlash = SKAction.repeatForever(sequence)
run(foreverFlash, withKey: "flash_forever")
}
func die() {
removeAction(forKey: "flapy_forever")
}
//start
func go() {
let body = SKPhysicsBody.init(rectangleOf: size)
body.mass = 0.1
body.categoryBitMask = SKSpriteNodeBitMaskBird
physicsBody = body
removeAction(forKey: "flash_forever")
let rotation = SKAction.run {
self.zRotation = .pi * body.velocity.dy * 0.0005
}
let wait = SKAction.wait(forDuration: 1.0/60.0)
let sequence = SKAction.sequence([wait, rotation])
run(SKAction.repeatForever(sequence), withKey: "rotation")
}
func flap() {
let body = self.physicsBody!
body.velocity = .init(dx: 0, dy: 0)
body.applyImpulse(.init(dx: 0, dy: 40))
}
}
import UIKit
import SpriteKit
enum PipeType {
case top
case bottom
}
class Pipe: SKSpriteNode {
var type:PipeType = .top
}