当我尝试运行我的游戏时，我得到了这个
fatal error: unexpectedly found nil while unwrapping an Optional value
带有线程错误
EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)"
这发生在这行代码上
HighscoreLbl.text = NSString(format: "Highscore : %i", Highscore)
在我的游戏场景中
import SpriteKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var movingGround: CSMovingGround!
var hero: CSHero!
var cloudGenerator: CSCloudGenerator!
var wallGenerator: CSWallGenerator!
var wall: CSWall!
var scoreLabel = UILabel()
var score = Int()
var isStarted = false
var heroCategory: UInt32 = 1<<1
var wallCategory: UInt32 = 1<<2
var groundCategory: UInt32 = 1<<2
var invisCategory: UInt32 = 1<<3
let walls = CSWall()
var HighscoreLbl: UILabel!
var Highscore = 0
override func didMoveToView(view: SKView) {
backgroundColor = UIColor(red: 159.0/255.0, green: 201.0/255, blue: 244.0/255.0, alpha: 1.0)
/*
let backgroundTexture = SKTexture(imageNamed: "background.png")
let backgroundImage = SKSpriteNode(texture: backgroundTexture, size: view.frame.size)
backgroundImage.position = view.center
addChild(backgroundImage)
*/
var HighscoreDefault = NSUserDefaults.standardUserDefaults()
if (HighscoreDefault.valueForKey("Highscore") != nil){
Highscore = HighscoreDefault.valueForKey("Highscore") as NSInteger!
HighscoreLbl.text = NSString(format: "Highscore : %i", Highscore)
}
// add ground
movingGround = CSMovingGround(size: CGSizeMake(view.frame.width, kCSGroundHeight))
movingGround.position = CGPointMake(0, view.frame.size.height/2)
self.addChild(movingGround)
// add hero
hero = CSHero()
hero.position = CGPointMake(70, movingGround.position.y + movingGround.frame.size.height/2 + hero.frame.size.height/2)
hero.physicsBody = SKPhysicsBody(rectangleOfSize: hero.size)
hero.physicsBody?.dynamic = true
hero.physicsBody?.allowsRotation = false
hero.physicsBody!.collisionBitMask = heroCategory | wallCategory
hero.physicsBody!.contactTestBitMask = wallCategory | heroCategory | groundCategory
self.addChild(hero)
hero.breathe()
// add cloud generator
cloudGenerator = CSCloudGenerator(color: UIColor.clearColor(), size: view.frame.size)
cloudGenerator.position = view.center
addChild(cloudGenerator)
cloudGenerator.populate(7)
cloudGenerator.startGeneratingWithSpawnTime(5)
// add wall generator
wallGenerator = CSWallGenerator(color: UIColor.clearColor(), size: view.frame.size)
wallGenerator.position = view.center
wallGenerator.physicsBody = SKPhysicsBody(edgeLoopFromRect : wallGenerator.frame)
wallGenerator.physicsBody?.dynamic = true
wallGenerator.physicsBody?.categoryBitMask = wallCategory
wallGenerator.physicsBody?.affectedByGravity = false
wallGenerator.physicsBody!.collisionBitMask = 0
wallGenerator.physicsBody!.contactTestBitMask = invisCategory
self.addChild(wallGenerator)
let ground1 = SKSpriteNode(color: UIColor.clearColor(), size: CGSizeMake(view.frame.size.width, 15))
ground1.position = view.center
ground1.physicsBody = SKPhysicsBody(rectangleOfSize: ground1.size)
ground1.physicsBody!.dynamic = false
ground1.physicsBody!.affectedByGravity = false
ground1.physicsBody!.categoryBitMask = groundCategory
ground1.physicsBody!.collisionBitMask = groundCategory | heroCategory
self.addChild(ground1)
let ground2 = SKSpriteNode(color: UIColor.clearColor(), size: CGSizeMake(view.frame.size.width, 20))
ground2.position = CGPointMake(284, 98)
ground2.physicsBody = SKPhysicsBody(rectangleOfSize: ground2.size)
ground2.physicsBody!.dynamic = false
ground2.physicsBody!.affectedByGravity = false
ground2.physicsBody!.categoryBitMask = groundCategory
ground2.physicsBody!.collisionBitMask = groundCategory | heroCategory
self.addChild(ground2)
let ground3 = SKSpriteNode(color: UIColor.clearColor(), size: CGSizeMake(20, 500))
ground3.position = CGPointMake(100, 100)
ground3.physicsBody = SKPhysicsBody(rectangleOfSize: ground3.size)
ground3.physicsBody?.dynamic = true
ground3.physicsBody?.affectedByGravity = false
ground3.physicsBody?.categoryBitMask = invisCategory
ground3.physicsBody!.collisionBitMask = 0
ground3.physicsBody!.contactTestBitMask = wallCategory
self.addChild(ground3)
physicsWorld.contactDelegate = self
scoreLabel = UILabel(frame: CGRect(x: 10, y: 15, width: 100, height: 20))
scoreLabel.backgroundColor = UIColor(red: 0.6, green: 0.1, blue: 0.1, alpha: 0)
scoreLabel.textColor = UIColor.blackColor()
self.view?.addSubview(scoreLabel)
HighscoreLbl = UILabel(frame: CGRect(x: 10, y: 0, width: 300, height: 20))
HighscoreLbl.textColor = UIColor.blackColor()
self.view?.addSubview(HighscoreLbl)
}
func start() {
isStarted = true
hero.stop()
hero.startRunning()
movingGround.start()
}
func addScore() {
score++
scoreLabel.text = NSString(format: "Score : %i", score)
if (score > Highscore){
Highscore = score
HighscoreLbl.text = NSString(format: "Highscore : %i", Highscore)
var HighscoreDefault = NSUserDefaults.standardUserDefaults()
HighscoreDefault.setValue(Highscore, forKey: "Highscore")
HighscoreDefault.synchronize()
}
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
if !isStarted {
start()
score = 0
scoreLabel.text = NSString(format: "Score : %i", score)
wallGenerator.startGeneratingWallsEvery(0.5)
} else {
hero.flip()
}
}
func didBeginContact(contact: SKPhysicsContact) {
var firstBody = SKPhysicsBody()
var secondBody = SKPhysicsBody()
if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
firstBody = contact.bodyA
secondBody = contact.bodyB
} else {
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if firstBody.categoryBitMask == invisCategory || secondBody.categoryBitMask == invisCategory {
self.addScore()
}
if (firstBody.categoryBitMask & UInt32(heroCategory)) != 0 && (secondBody.categoryBitMask & UInt32(wallCategory)) != 0 {
self.addScore()
wallGenerator.removeFromParent()
let reveal = SKTransition.flipHorizontalWithDuration(0.5)
let scene = GameOverScene(size: self.size, won: false)
self.view?.presentScene(scene, transition: reveal)
scoreLabel.removeFromSuperview()
}
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}