如何使用按钮启动此游戏？我正在使用Xcode 6，Swift和SpriteKit。当我在iOS模拟器上运行它时，我的游戏开始了，但我想通过按下播放按钮来启动它。
这是我的代码：
import SpriteKit
import AVFoundation
class GameScene: SKScene, SKPhysicsContactDelegate{
var cat:SKSpriteNode!
var skyColor:SKColor!
var obstTextureUp:SKTexture!
var obstTextureDown:SKTexture!
var moveObstAndRemove:SKAction!
var moving:SKNode!
var obsts:SKNode!
var canRestart = Bool()
var scoreLabelNode:SKLabelNode!
var score = NSInteger()
let verticalObstGap = 150.0
var playButton:SKSpriteNode = SKSpriteNode(imageNamed:"playButton")
let catCategory: UInt32 = 1 << 2
let worldCategory: UInt32 = 1 << 1
let obstCategory: UInt32 = 1 << 2
let scoreCategory: UInt32 = 1 << 3
override func didMoveToView(view: SKView) {
canRestart = true
self.physicsWorld.gravity = CGVectorMake( 0.0, -6.3 )
self.physicsWorld.contactDelegate = self
moving = SKNode()
self.addChild(moving)
obsts = SKNode()
moving.addChild(obsts)
let Label = SKSpriteNode(imageNamed: "Label")
Label.position = CGPoint(x:515,y:650)
Label.size = CGSizeMake(Label.frame.size.width, 60)
self.addChild(Label)
playButton.position = CGPoint(x: self.frame.size.width / 2 , y: self.frame.size.height / 2)
playButton.setScale(0.5)
self.addChild(playButton)
let TextureG = SKTexture(imageNamed: "G")
TextureG.filteringMode = .Nearest
let TextureS = SKTexture(imageNamed: "S")
TextureS.filteringMode = .Nearest
obstTextureUp = SKTexture(imageNamed: "obstUp")
obstTextureUp.filteringMode = .Nearest
obstTextureDown = SKTexture(imageNamed: "obstDown")
obstTextureDown.filteringMode = .Nearest
let moveGSprite = SKAction.moveByX(-TextureG.size().width * 2.0, y: 0, duration: NSTimeInterval(0.02 * TextureG.size().width * 2.0))
let resetGSprite = SKAction.moveByX(TextureG.size().width * 2.0, y: 0, duration: 0.0)
let moveGSpritesForever = SKAction.repeatActionForever(SKAction.sequence([moveGSprite,resetGSprite]))
for var i:CGFloat = 0; i < 2.0 + self.frame.size.width / ( TextureG.size().width * 2.0 ); ++i {
let sprite = SKSpriteNode(texture: TextureG)
sprite.setScale(2.0)
sprite.position = CGPointMake(i * sprite.size.width, sprite.size.height / 2.0)
sprite.runAction(moveGSpritesForever)
moving.addChild(sprite)
}
let moveSSprite = SKAction.moveByX(-skyTexture.size().width * 2.0, y: 0, duration: NSTimeInterval(0.1 * skyTexture.size().width * 2.0))
let resetSSprite = SKAction.moveByX(TextureS.size().width * 2.0, y: 0, duration: 0.0)
let moveSSpritesForever = SKAction.repeatActionForever(SKAction.sequence([moveSSprite,resetSSprite]))
for var i:CGFloat = 0; i < 2.0 + self.frame.size.width / ( skyTexture.size().width * 2.0 ); ++i {
let sprite = SKSpriteNode(texture: TextureS)
sprite.setScale(2.0)
sprite.zPosition = -20
sprite.position = CGPointMake(i * sprite.size.width, sprite.size.height / 2.0 + TextureG.size().height * 2.0)
sprite.runAction(moveSSpritesForever)
moving.addChild(sprite)
}
let distanceToMove = CGFloat(self.frame.size.width + 2.0 * obstTextureUp.size().width)
let moveObsts = SKAction.moveByX(-distanceToMove, y:0.0, duration:NSTimeInterval(0.01 * distanceToMove))
let removeObsts = SKAction.removeFromParent()
moveObstsAndRemove = SKAction.sequence([moveObsts, removeObsts])
let spawn = SKAction.runBlock({() in self.spawnObsts()})
let delay = SKAction.waitForDuration(NSTimeInterval(2.0))
let spawnThenDelay = SKAction.sequence([spawn, delay])
let spawnThenDelayForever = SKAction.repeatActionForever(spawnThenDelay)
self.runAction(spawnThenDelayForever)
let catTexture1 = SKTexture(imageNamed: "cat-1")
catTexture1.filteringMode = .Nearest
let catTexture2 = SKTexture(imageNamed: "cat-2")
catTexture2.filteringMode = .Nearest
let catTexture3 = SKTexture(imageNamed: "cat-3")
catTexture1.filteringMode = .Nearest
let catTexture4 = SKTexture(imageNamed: "cat-4")
catTexture2.filteringMode = .Nearest
let anim = SKAction.animateWithTextures([catTexture1, catTexture2, catTexture3, catTexture4], timePerFrame: 0.11)
let clip = SKAction.repeatActionForever(anim)
cat = SKSpriteNode(texture: catTexture1)
cat.setScale(2.0)
cat.position = CGPoint(x: self.frame.size.width * 0.35, y:self.frame.size.height * 0.6)
cat.runAction(clip)
cat.physicsBody = SKPhysicsBody(circleOfRadius: bird.size.height / 2.0)
cat.physicsBody?.dynamic = true
cat.physicsBody?.allowsRotation = false
cat.physicsBody?.categoryBitMask = catCategory
cat.physicsBody?.collisionBitMask = worldCategory | obstCategory
cat.physicsBody?.contactTestBitMask = worldCategory | obstCategory
self.addChild(cat)
var ground = SKNode()
ground.position = CGPointMake(0, TextureG.size().height)
ground.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(self.frame.size.width, TextureG.size().height * 2.0))
ground.physicsBody?.dynamic = false
ground.physicsBody?.categoryBitMask = worldCategory
self.addChild(ground)
score = 0
scoreLabelNode = SKLabelNode(fontNamed:"Font")
scoreLabelNode.position = CGPointMake( CGRectGetMidX( self.frame ), 3 * self.frame.size.height / 4 )
scoreLabelNode.zPosition = 100
scoreLabelNode.text = String(score)
self.addChild(scoreLabelNode)
}
func spawnObsts() {
let obstPair = SKNode()
obstPair.position = CGPointMake( self.frame.size.width + obstTextureUp.size().width * 2, 0 )
obstPair.zPosition = -10
let height = UInt32( self.frame.size.height / 4 )
let y = arc4random() % height + height
let obstDown = SKSpriteNode(texture: obstTextureDown)
obstDown.setScale(2.0)
obstDown.position = CGPointMake(0.0, CGFloat(y) + obstDown.size.height + CGFloat(verticalObstGap))
obstDown.physicsBody = SKPhysicsBody(rectangleOfSize: obstDown.size)
obstDown.physicsBody?.dynamic = false
obstDown.physicsBody?.categoryBitMask = obstCategory
obstDown.physicsBody?.contactTestBitMask = catCategory
obstPair.addChild(obstDown)
let obstUp = SKSpriteNode(texture: obstTextureUp)
obstUp.setScale(2.0)
obstUp.position = CGPointMake(0.0, CGFloat(y))
obstUp.physicsBody = SKPhysicsBody(rectangleOfSize: obstUp.size)
obstUp.physicsBody?.dynamic = false
obstUp.physicsBody?.categoryBitMask = obstCategory
obstUp.physicsBody?.contactTestBitMask = catCategory
obstPair.addChild(obstUp)
var contactNode = SKNode()
contactNode.position = CGPointMake( obstDown.size.width + cat.size.width / 2, CGRectGetMidY( self.frame ) )
contactNode.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake( obstUp.size.width, self.frame.size.height ))
contactNode.physicsBody?.dynamic = false
contactNode.physicsBody?.categoryBitMask = scoreCategory
contactNode.physicsBody?.contactTestBitMask = catCategory
obstPair.addChild(contactNode)
obstPair.runAction(moveObstsAndRemove)
obsts.addChild(pipePair)
}
func resetScene (){
cat.position = CGPointMake(self.frame.size.width / 2.5, CGRectGetMidY(self.frame))
cat.physicsBody?.velocity = CGVectorMake( 0, 0 )
cat.physicsBody?.collisionBitMask = worldCategory | obstCategory
cat.speed = 1.0
cat.zRotation = 0.0
obsts.removeAllChildren()
canRestart = false
score = 0
scoreLabelNode.text = String(score)
moving.speed = 1
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
if moving.speed > 0 {
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
runAction(SKAction.playSoundFileNamed("sound.wav", waitForCompletion: false))
cat.physicsBody?.velocity = CGVectorMake(0, 0)
cat.physicsBody?.applyImpulse(CGVectorMake(0, 30))
}
}else if canRestart {
self.resetScene()
}
}
func clamp(min: CGFloat, max: CGFloat, value: CGFloat) -> CGFloat {
if( value > max ) {
return max
} else if( value < min ) {
return min
} else {
return value
}
}
override func update(currentTime: CFTimeInterval) {
cat.zRotation = self.clamp( -1, max: 0.5, value: cat.physicsBody!.velocity.dy * ( cat.physicsBody!.velocity.dy < 0 ? 0.003 : 0.001 ) )
}
func didBeginContact(contact: SKPhysicsContact) {
if moving.speed > 0 {
if ( contact.bodyA.categoryBitMask & scoreCategory ) == scoreCategory || ( contact.bodyB.categoryBitMask & scoreCategory ) == scoreCategory {
score++
scoreLabelNode.text = String(score)
scoreLabelNode.runAction(SKAction.sequence([SKAction.scaleTo(1.5, duration:NSTimeInterval(0.7)), SKAction.scaleTo(1.0, duration:NSTimeInterval(0.1))]))
} else {
moving.speed = 0
cat.physicsBody?.collisionBitMask = worldCategory
cat.runAction( SKAction.rotateByAngle(CGFloat(M_PI) * CGFloat(cat.position.y) * 0.01, duration:1), completion:{self.cat.speed = 0 })
runAction(SKAction.playSoundFileNamed("sound2.wav", waitForCompletion: false))
self.removeActionForKey("flash")
self.runAction(SKAction.sequence([SKAction.repeatAction(SKAction.sequence([SKAction.runBlock({
self.backgroundColor = SKColor(red: 0.2, green: 1, blue: 0.1, alpha: 1.0)
}),SKAction.waitForDuration(NSTimeInterval(0.05)), SKAction.runBlock({
self.backgroundColor = self.skyColor
}), SKAction.waitForDuration(NSTimeInterval(0.05))]), count:4), SKAction.runBlock({
self.canRestart = true
})]), withKey: "flash")
}
}
}
}
答案 0 :(得分：0)
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
if(playButton contains:location)
{
//Remove this code from your didMoveToView
self.physicsWorld.gravity = CGVectorMake( 0.0, -6.3 )
self.physicsWorld.contactDelegate = self
[playButton removeFromParent]
}
}
这样可以防止在您点击播放按钮之前应用接触和重力。
答案 1 :(得分：0)
将speed of your scene's physicsWorld设置为零以暂停模拟。将其重新设置为1以恢复正常速度模拟。