SKPhysics聯繫人無法正常工作

Question

我想在SpriteKit中使用SKPhysicsContactDelegate函數，它似乎不工作。我希望一個精靈在碰到另一個時執行一個動作。我在didBeginContact函數中設置了斷點，由於某種原因，我的應用程序從不調用此函數。所有幫助讚賞。代碼如下。

struct PhysicsCatagory { 
    static let Enemy :UInt32 = 0x1 << 0 
    static let Slider :UInt32 = 0x1 << 1 
    static let Circle :UInt32 = 0x1 << 2 
} 

class GameScene: SKScene, SKPhysicsContactDelegate { 

    var EnemyTimer = NSTimer() 

    var Circle = SKSpriteNode() 
    var Slider = SKSpriteNode() 
    var FastButton = SKNode() 

    var Title = SKSpriteNode() 
    var Text = SKSpriteNode() 

    var Path = UIBezierPath() 

    var gameStarted = Bool() 

    override func didMoveToView(view: SKView) { 

     self.physicsWorld.contactDelegate = self 

     self.backgroundColor = UIColor.whiteColor() 


     Circle = SKSpriteNode(imageNamed:"blueCircle") 
     Circle.size = CGSize(width: 140, height: 140) 
     Circle.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame)) 
     Circle.zPosition = 1.0 
     self.addChild(Circle) 

     Slider = SKSpriteNode(imageNamed: "blocker1") 
     Slider.size = CGSize(width: 15, height: 50) 
     Slider.position = CGPoint(x: self.frame.width/2, y: self.frame.height/2 + 80) 
     addChild(Slider) 
     Slider.zPosition = 1.0 


     moveClockWise() 



      } 


    func didBeginContact(contact: SKPhysicsContact) { 
     if contact.bodyA.node != nil && contact.bodyB.node != nil{ 
      let firstBody = contact.bodyA.node as! SKSpriteNode 
      let secondBody = contact.bodyB.node as! SKSpriteNode 

     if ((firstBody.name == "Enemy") && (secondBody.name == "Slider")){ 

      collisionBall(firstBody, Slider: secondBody) 

     } 
     else if ((firstBody.name == "Slider") && (secondBody.name == "Enemy")) { 

      collisionBall(secondBody, Slider: firstBody) 

     } 


    } 

    } 

    func collisionBall(Enemy : SKSpriteNode, Slider : SKSpriteNode){ 

     Enemy.physicsBody?.dynamic = true 
     Enemy.physicsBody?.affectedByGravity = true 
     Enemy.physicsBody?.mass = 4.0 
     Slider.physicsBody?.mass = 4.0 

     Enemy.removeAllActions() 

     Enemy.physicsBody?.contactTestBitMask = 0 
     Enemy.physicsBody?.collisionBitMask = 0 
     Enemy.name = nil 



    } 


    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 

     //Slider.hidden = false 
     FastButton.hidden = false 
     Title.hidden = true 
     Text.hidden = true 

     EnemyTimer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: #selector(GameScene.Enemies), userInfo: nil, repeats: true) 

     //Physics 
     Slider.physicsBody?.categoryBitMask = PhysicsCatagory.Slider 
     Slider.physicsBody?.collisionBitMask = PhysicsCatagory.Enemy 
     Slider.physicsBody?.contactTestBitMask = PhysicsCatagory.Enemy 
     Slider.name = "Slider" 
     Slider.physicsBody?.dynamic = true 
     Slider.physicsBody?.affectedByGravity = true 




     if gameStarted == false{ 

      gameStarted = true 



     } 
     else if gameStarted == true{ 


     } 


    } 

    func moveClockWise(){ 

     let dx = Slider.position.x/2 
     let dy = Slider.position.y/2 

     let rad = atan2(dy, dx) 


     let Path = UIBezierPath(arcCenter: CGPoint(x: self.frame.width/2, y: self.frame.height/2), radius: 90, startAngle: rad, endAngle: rad + CGFloat(M_PI * 4), clockwise: true) 

     let follow = SKAction.followPath(Path.CGPath, asOffset: false, orientToPath: true, speed: 150) 
     //let rotate = SKAction.rotateByAngle(75, duration: 100) 

     Slider.runAction(SKAction.repeatActionForever(follow).reversedAction()) 
     //Slider.runAction(SKAction.repeatActionForever(rotate).reversedAction()) 


    } 


    func Enemies(){ 

     let Enemy = SKSpriteNode(imageNamed: "darkRedDot") 
     Enemy.size = CGSize(width: 20, height: 20) 


     //Physics 
     Enemy.physicsBody = SKPhysicsBody(circleOfRadius: Enemy.size.width/2) 
     Enemy.physicsBody?.categoryBitMask = PhysicsCatagory.Enemy 
     Enemy.physicsBody?.contactTestBitMask = PhysicsCatagory.Slider //| PhysicsCatagory.Circle 
     Enemy.physicsBody?.collisionBitMask = PhysicsCatagory.Slider //| PhysicsCatagory.Circle 
     Enemy.physicsBody?.dynamic = true 
     Enemy.physicsBody?.affectedByGravity = false 
     Enemy.name = "Enemy" 

Answer 1

聯繫人未開始，因爲您的滑塊沒有物理主體，導致無法識別聯繫人。除非它不在這個代碼中，否則你的滑塊沒有物理體，但是你的敵人會。嘗試聲明Slider.phisicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "blocker1"), size: Slider.size)

另外，您應該閱讀關於Swift中的標準命名約定。建議您的變量始終以小寫字母開頭（例如，enemyTimer,circle,slider,fastButton等）。