Xcode6 didBeginContact不会被调用

Question

我一直在试图得到这个工作的一个简单的构建平台的游戏，但是接触检测已经给我的问题。该didBeginContact功能似乎并没有被获取调用时，两个节点碰，这里是代码：

import SpriteKit 
var idleFrames = [SKTexture]() 
var walkFrames = [SKTexture]() 
var player: SKSpriteNode! 
var touchingGround = 0 
var idling = 0 

class GameScene: SKScene, SKPhysicsContactDelegate { 
    var sp33d: CGVector = CGVectorMake(0.0,0.0) 
    var jsp33d: CGFloat = 30 
    var gameStick: Joystick? 
    var ground: SKSpriteNode? 
    let playerskin = character(charnumber: 1) 

func didBeginContact(contact: SKPhysicsContact) { 
    print("hit") 
    let firstNode = contact.bodyA.node as! SKSpriteNode 
    let secondNode = contact.bodyB.node as! SKSpriteNode 

    if (contact.bodyA.categoryBitMask == category.player) && (contact.bodyB.categoryBitMask == category.ground) { 
     touchingGround = 1 
    }else{ 
     touchingGround = 0 
    } 
} 
override func didMoveToView(view: SKView) { 
    /* Setup your scene here */ 
    self.physicsWorld.contactDelegate = self 
    self.physicsWorld.gravity = CGVectorMake(0, -10.0) 

    gameStick = Joystick() 
    gameStick?.createJoystick(self.scene!.frame.width/4, nameBack: "joystick", nameMoving: "joystick1") 
    gameStick!.backPart!.zPosition = 4 
    gameStick!.movingPart!.zPosition = 5 
    self.addChild(gameStick!.backPart!) 
    self.addChild(gameStick!.movingPart!) 

    player = self.childNodeWithName("player") as? SKSpriteNode 
    ground = self.childNodeWithName("testGround") as? SKSpriteNode 
    player?.physicsBody?.categoryBitMask = category.player 
    ground?.physicsBody?.categoryBitMask = category.ground 

    let idleAtlas = SKTextureAtlas(named: "idle.atlas") 
    var idleframes = [SKTexture]() 
    let numImages = idleAtlas.textureNames.count 
    for var i=1; i<=4; i++ { 
     let idleframe = "JohnIdle\(i)" 
     idleframes.append(idleAtlas.textureNamed(idleframe)) 
    } 
    idleFrames = idleframes 
    let firstFrame = idleframes[0] 
} 

func idleflag() { 
    idling = 0 
    } 

func idlejohn() { 
    if sp33d.dx < 1 || sp33d.dx > -1{ 
     print("boop") 
     idling = 1 
     player?.runAction(SKAction.repeatAction(SKAction.animateWithTextures(idleFrames, timePerFrame: 0.4, resize: false, restore: true), count: 1)) 
    } 
} 

override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) { 
    for touch in (touches as! Set<UITouch>) { 
     let location = touch.locationInNode(self) 
     var nodeTouched = SKNode() 
     nodeTouched = self.nodeAtPoint(location) 
     if nodeTouched.name == "joystick1" { 
      gameStick?.movingPart?.position = location 
      if location.x > gameStick!.backPart!.position.x + gameStick!.backPart!.frame.width/2{ 
       gameStick?.movingPart?.position = CGPointMake(gameStick!.backPart!.position.x + gameStick!.backPart!.frame.width/2, gameStick!.movingPart!.position.y) 
      } 
      if location.y > gameStick!.backPart!.position.y + gameStick!.backPart!.frame.height/2{ 
       gameStick?.movingPart?.position = CGPointMake(gameStick!.movingPart!.position.x, gameStick!.backPart!.position.y + gameStick!.backPart!.frame.height/2) 
      } 
     } 
    } 
} 

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) { 
    /* Called when a touch begins */ 
    for touch in (touches as! Set<UITouch>) { 
     let location = touch.locationInNode(self) 
     var nodeTouched = SKNode() 
     nodeTouched = self.nodeAtPoint(location) 
     if nodeTouched.name == "joystick1" { 
      gameStick?.movingPart?.position = location 
      if location.x > gameStick!.backPart!.position.x + gameStick!.backPart!.frame.width/2{ 
       gameStick?.movingPart?.position = CGPointMake(gameStick!.backPart!.position.x + gameStick!.backPart!.frame.width/2, gameStick!.movingPart!.position.y) 
      } 
      if location.y > gameStick!.backPart!.position.y + gameStick!.backPart!.frame.height/2{ 
       gameStick?.movingPart?.position = CGPointMake(gameStick!.movingPart!.position.x, gameStick!.backPart!.position.y + gameStick!.backPart!.frame.height/2) 
      } 
     } 
    } 
} 

override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) { 
    for touch in (touches as! Set<UITouch>) { 
     let location = touch.locationInNode(self) 
     var nodeTouched = SKNode() 
     nodeTouched = self.nodeAtPoint(location) 
     if nodeTouched.name == "joystick1" { 
    let act = SKAction.moveTo(gameStick!.backPart!.position, duration: 0.2) 
    gameStick?.movingPart?.runAction(act) 
     } 
    } 
} 

override func update(currentTime: CFTimeInterval) { 
    /* Called before each frame is rendered */ 
    let vX = gameStick!.movingPart!.position.x - gameStick!.backPart!.position.x 

    var vY: CGFloat = gameStick!.movingPart!.position.y 

    if vY > gameStick!.backPart!.position.y + 20 && touchingGround == 1{ 
      sp33d = CGVectorMake(vX/13, jsp33d) 
    }else{ 
      sp33d = CGVectorMake(vX/13, 0) 
    } 
    player?.physicsBody?.applyImpulse(sp33d) 

    idlejohn() 
    } 
} 

这里是位掩码代码：

import Foundation 
import SpriteKit 

var charnumber = 0 
var charsize = [0: CGSizeMake(80,80)] 

struct category { 
    static let player: UInt32 = 0x1 << 0 
    static let ground: UInt32 = 0x1 << 1 

} 

任何帮助将不胜感激，谢谢！

在

Answer 1

似乎你还没有初始化播放器和地面物理身体

player = self.childNodeWithName("player") as? SKSpriteNode 
ground = self.childNodeWithName("testGround") as? SKSpriteNode 
player?.physicsBody?.categoryBitMask = category.player 
ground?.physicsBody?.categoryBitMask = category.ground 

球员？.physicsBody = SKPhysicsBody（）//括号内选择体的类型（矩形，圆形等。） 同样适用于地面，如果你想让对象成为联系人，首先你需要分配尸体。