我的代碼檢測與精靈的碰撞，但不會發生碰撞？ - 斯威夫特

這裏是我的didBeginContact：我的代碼檢測與精靈的碰撞，但不會發生碰撞？ - 斯威夫特

func didBeginContact(contact: SKPhysicsContact) { 


    let firstBody = contact.bodyA 
    let secondBody = contact.bodyB 


    let ballWasContacted = firstBody.categoryBitMask == PhysicsCat.Ball || secondBody.categoryBitMask == PhysicsCat.Ball 
    let wallWasContacted = firstBody.categoryBitMask == PhysicsCat.Wall || secondBody.categoryBitMask == PhysicsCat.Wall 
    let wallCheckWasContacted = firstBody.categoryBitMask == PhysicsCat.wallSpace || secondBody.categoryBitMask == PhysicsCat.wallSpace 
    let scoreWasContacted = firstBody.categoryBitMask == PhysicsCat.Score || secondBody.categoryBitMask == PhysicsCat.Score 
    let boundaryWasContacted = firstBody.categoryBitMask == PhysicsCat.Boundaries || secondBody.categoryBitMask == PhysicsCat.Boundaries 


    if boundaryWasContacted { 

     print("I collided with the boundary.") 

     }

這裏是我的邊界精靈節點：

let boundary = SKSpriteNode(color: SKColor.whiteColor(), size: CGSize(width: 50, height: 150)) 
    boundary.name = "boundary" 
    boundary.position = CGPoint(x: self.frame.width/1.37, y: self.frame.height/2) 
    boundary.physicsBody = SKPhysicsBody(rectangleOfSize: boundary.size) 
    boundary.physicsBody!.categoryBitMask = PhysicsCat.Boundaries 
    boundary.physicsBody?.contactTestBitMask = PhysicsCat.Ball 
    boundary.physicsBody?.collisionBitMask = PhysicsCat.Ball 
    boundary.physicsBody!.dynamic = false 
    boundary.physicsBody!.friction = 0 
    boundary.physicsBody!.restitution = 1 
    boundary.zPosition = 5 
    self.addChild(boundary)

最後這裏是我的球：

Ball = SKSpriteNode(imageNamed: "Ball") 
    Ball.size = CGSize(width: 38, height: 38) 
    Ball.position = CGPoint(x: self.frame.width/2, y: self.frame.height/2) 
    Ball.physicsBody = SKPhysicsBody(circleOfRadius: Ball.frame.width/2) 
    Ball.physicsBody?.categoryBitMask = PhysicsCat.Ball 
    Ball.physicsBody?.collisionBitMask = PhysicsCat.Wall 
    Ball.physicsBody?.contactTestBitMask = PhysicsCat.Wall | PhysicsCat.Score | PhysicsCat.wallSpace | PhysicsCat.Boundaries 
    Ball.physicsBody?.affectedByGravity = false 
    Ball.physicsBody?.dynamic = true 
    Ball.physicsBody!.allowsRotation = true 
    Ball.zRotation = CGFloat(M_PI) 
    self.addChild(Ball)

當我所接觸邊界，它打印出「我與邊界相撞」，但我直接穿過它。我究竟從我的代碼中錯過了什麼，以便在球和邊界之間發生實際的碰撞？

來源

2016-06-25 Tiptonix Beats