當玩家節點與另一個節點發生衝突時，遊戲結束時，遊戲只應在玩家與邊界碰撞時結束

Question

問題：只要玩家節點與硬幣節點接觸，遊戲就會在遊戲只有在玩家與邊界碰撞時纔會結束。

輸出結果應該是：玩家應該能夠接觸到硬幣節點並穿過硬幣節點，爲scoreLabel添加一個值。 當前的代碼：

struct ColliderType { 

static let playerCategory: UInt32 = 0x1 << 0 
static let boundary: UInt32 = 0x1 << 1 
static let coinCategory: UInt32 = 0x1 << 2 
static let firstBody: UInt32 = 0x1 << 3 
static let secondBody: UInt32 = 0x1 << 4 

} 

    var gameOver = false 
    var coinInt = 0 

    coin.physicsBody?.categoryBitMask = ColliderType.coinCategory 
    coin.physicsBody?.contactTestBitMask = ColliderType.playerCategory 
    coin.physicsBody?.collisionBitMask = 0 


    player.physicsBody?.categoryBitMask = ColliderType.playerCategory 
    player.physicsBody?.contactTestBitMask = ColliderType.boundary | ColliderType.coinCategory 
    player.physicsBody?.collisionBitMask = ColliderType.boundary 

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 == ColliderType.playerCategory && secondBody.categoryBitMask == ColliderType.coinCategory { 
     self.coin.removeFromParent() 
     coinInt += 1 
     coinLabel.text = "\(coinInt)" 
    } 

    gameOver = true 
    self.speed = 0 
    timer.invalidate() 

} 

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

    self.player.physicsBody?.velocity = CGVectorMake(1, 3) 
    self.player.physicsBody?.applyImpulse(CGVectorMake(0, 12)) 

    } 

} 

UPDATE：

boundary.contactTestBitMask = ColliderType.playerCategory 
    boundary.categoryBitMask = ColliderType.boundary 
    boundary.collisionBitMask = ColliderType.playerCategory 

    coin.physicsBody?.categoryBitMask = ColliderType.coinCategory 
    coin.physicsBody?.contactTestBitMask = ColliderType.playerCategory 
    coin.physicsBody?.collisionBitMask = 0 


    player.physicsBody?.categoryBitMask = ColliderType.playerCategory 
    player.physicsBody?.contactTestBitMask = ColliderType.coinCategory 
    player.physicsBody?.collisionBitMask = ColliderType.boundary 




func didBeginContact(contact:SKPhysicsContact) { 
    let firstBody: SKPhysicsBody 
    let 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 == ColliderType.coinCategory || secondBody.categoryBitMask == ColliderType.coinCategory { 

    self.coin.removeFromParent() 
    self.coinInt += 1 
    self.coinLabel.text = "\(self.coinInt)" 

    }else if firstBody.categoryBitMask == ColliderType.boundary || secondBody.categoryBitMask == ColliderType.boundary { 

    gameOver = true 
    self.speed = 0 
    timer.invalidate() 

} 
} 

Answer 1

你gameOver = true陳述外didBeginContact所有IFS。換句話說：發生聯繫的那一刻你設置了gameOver = true。

if firstBody.categoryBitMask == ColliderType.coinCategory || secondBody.categoryBitMask == ColliderType.coinCategory { 
    self.coin.removeFromParent() 
    coinInt += 1 
    coinLabel.text = "\(coinInt)" 
} else if firstBody.categoryBitMask == ColiderType.boundary || secondBody.categoryBitMask == ColiderType.boundary { 
    gameOver = true 
    self.speed = 0 
    timer.invalidate() 
} 

可能更接近你想要的。

Answer 2

一個更清潔的方式來編碼didBeginContact，從而降低約與firstBody/secondbody的碴，是：

func didBeginContact(contact: SKPhysicsContact) { 
     let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask 

     switch contactMask { 

     case ColliderType.playerCategory | ColliderType.coinCategory: 
      // player and coin have contacted. We need to get the coin, which is either firstBody or secondBody, to remove it, so assign the corect one to coinNode 
      let coinNode = contact.bodyA.categoryBitMask == ColliderType.coinCategory ? contact.bodyA.node! : contact.bodyB.node! 
      coinNode.removefromParent 
      coinInt += 1 
      coinLabel.text = "\(coinInt)" 

     case ColliderType.playerCategory | ColliderType.boundaryCategory: 
      // player and boundary have contacted 
       gameOver = true 
      self.speed = 0 
      timer.invalidate() 

     default : 
      //Some other contact has occurred 
      print("Some other contact") 
     } 
    } 

只要你喜歡你可以添加儘可能多的case ColliderType.object1 | ColliderType.object2:。

Answer 3

（添加一個新的答案，因爲它是基於新的代碼和討論/在OP-問題的變化將使邏輯流有點難以跟隨）

首先，我會進行以下變化到physicBodies：

player.physicsBody?.contactTestBitMask = 0 // or ColliderType.None which would be my stylistic choice 

那麼剩下就看是這樣的。

func didBeginContact(contact:SKPhysicsContact) { 
    let firstBody = contact.bodyA 
    let secondBody = contact.bodyB 

    if firstBody.categoryBitMask == ColliderType.coinCategory || secondBody.categoryBitMask == ColliderType.coinCategory { 
     self.coin.removeFromParent() 
     self.coinInt += 1 
     self.coinLabel.text = "\(self.coinInt)" 
    } else if firstBody.categoryBitMask == ColliderType.boundary || secondBody.categoryBitMask == ColliderType.boundary { 
     gameOver = true 
     self.speed = 0 
     timer.invalidate() 
    } 
} 

的說明： 它不是從提供的代碼self.coin如何引用清楚。我猜self.coin.removeFromParent()可能沒有太多的意義，因爲你在第一篇文章中寫的幾個硬幣。它可能應該是這樣的，而不是：

if contact.bodyA.categoryBitMask == ColliderType.coinCategory { 
    contact.bodyA.node!.removeFromParent() 
} else if contact.bodyB.categoryBitMask == ColliderType.coinCategory { 
    contact.bodyB.node!.removeFromParent() 
} 

，但我真的考慮返工整個接觸處理成不同的野獸完全如果您計劃在此上下行擴大。