Swift 3 我的游戏结束代码无法正常工作

Question

如果我触摸除了按钮之外的游戏就会崩溃。我能做什么？如何？我想忽略按钮以外的所有触摸。我怎样才能做到这一点？这是我的 touchesBegan：

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first
    if let location = touch?.location(in: self),
        let node = self.nodes(at: location).first {

        var player = SKSpriteNode()

        if node.name == "BlueButton" {
            player = playerB
            playerB.isHidden = false

        } else if node.name == "RedButton" {
            player = playerR
            playerR.isHidden = false

        } else if node.name == "YellowButton" {
            player = playerY
            playerY.isHidden = false

        } else if node.name == "GreenButton" {
            player = playerG
            playerG.isHidden = false

        }
        for sprite in [playerB, playerW, playerR, playerY, playerG] {
            sprite?.removeFromParent()
        }
        player.position = CGPoint(x: 0, y: -60)
        addChild(player)
    }

}

这是我的 touchesEnded 函数

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    addChild(playerW)
    playerB.removeFromParent()
    playerR.removeFromParent()
    playerY.removeFromParent()
    playerG.removeFromParent()

}

Answer 1

我觉得这个条件

if firstBody.node?.name == "BLUE" && secondBody.node?.name == "BLUEBLOCK" ||
   firstBody.node?.name == "RED" && secondBody.node?.name == "REDBLOCK" ||
   firstBody.node?.name == "YELLOW" && secondBody.node?.name == "YELLOWBLOCK" &&
   firstBody.node?.name == "GREEN" && secondBody.node?.name == "GREENBLOCK"

应该看起来像

if (firstBody.node?.name == "BLUE" && secondBody.node?.name == "BLUEBLOCK") ||
   (firstBody.node?.name == "RED" && secondBody.node?.name == "REDBLOCK") ||
   (firstBody.node?.name == "YELLOW" && secondBody.node?.name == "YELLOWBLOCK") ||
   (firstBody.node?.name == "GREEN" && secondBody.node?.name == "GREENBLOCK")

它看起来还是很丑，但必须工作

Answer 2

好吧，坦白说有点乱，尤其是 didBeginContact 函数。如果我没看错你的意图，它应该是这样的：

与 "white" 方块的任何接触都应该结束游戏。
对于除一个之外的所有其他颜色的接触，特定颜色应该结束游戏。
联系与特定颜色应该增加分数。

如果这确实是我们的目标，那么像下面这样的东西应该可以工作，尽管我仍然建议进一步重构以避免将 game-logic 的如此重要的部分基于 flakey string-matching:

func didBegin(_ contact: SKPhysicsContact) {
    guard let nodeA = contact.bodyA.node else { 
        // this and the one blow are good places to add a breakpoint to inspect what's going on if still having problems
        return 
    }  
    guard let nodeB = contact.bodyB.node else { 
         return 
    }

    // Some Bools to make the below logic more readable
    let blueContacted = nodeA.name == "BLUEBLOCK" || nodeB.name == "BLUEBLOCK"
    let redContacted = nodeA.name == "REDBLOCK" || nodeB.name == "REDBLOCK"
    let yellowContacted = nodeA.name == "YELLOWBLOCK" || nodeB.name == "YELLOWBLOCK"
    let greenContacted = nodeA.name == "GREENBLOCK" || nodeB.name == "GREENBLOCK"

    var removableNodeName: String?

    if blueContacted && yellowContacted {
        removableNodeName = "YELLOWBLOCK"
    } else if redContacted && greenContacted {
        removableNodeName = "GREENBLOCK"
    } else if yellowContacted && blueContacted {
        removableNodeName = "BLUEBLOCK"
    } else if greenContacted && redContacted {
        removableNodeName = "REDBLOCK"
    }

    if let nodeName = removableNodeName {
        score += 1
        scoreLabel?.text = "\(score)"
        if nodeA.name == nodeName {
            nodeA.run(SKAction.move(to: CGPoint(x: 0 , y: 360), duration: 0.3))
            nodeA.run(SKAction.fadeOut(withDuration: 0.3))
        } else {
            nodeB.run(SKAction.move(to: CGPoint(x: 0 , y: 360), duration: 0.3))
            nodeB.run(SKAction.fadeOut(withDuration: 0.3))
        }
    } else { // Any other contact means game over
        nodeA.removeFromParent()
        nodeB.removeFromParent()
        score = 0
        scoreLabel?.text = "\(score)"
        gameOver()
    }
}

编辑：添加了一些守卫以根据下面的讨论检查 physicsBodies 上是否存在节点。

Answer 3

根据我在其他回答中的讨论，我猜测您的 touchesBegan 的复杂性导致您偶尔会添加多个版本的 player-sprite .下面应该只添加每个 playerSprite 一次并且一次只添加一个这应该可以更容易地避免由于精灵覆盖精灵等而导致的意外接触。 ..

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first
    if let location = touch?.location(in: self),
        let node = self.nodes(at: location).first {

        var player = SKSpriteNode()

        if node.name == "BlueButton" {
            player = playerB
        } else if node.name == "RedButton" {
            player = playerR
        } else if node.name == "YellowButton" {
            player = playerY
        } else if node.name == "GreenButton" {
            player = playerG
        }
        for sprite in [playerB, playerW, playerR, playerY, playerG] {
            sprite.removeFromParent()
        }
        player.position = CGPoint(x: 0, y: -50)
        addChild(player)
    }
}

Swift 3 我的游戏结束代码无法正常工作

Swift 3 my game over code doesn't work correctly

function

scene

sprite-kit

swift

swift3