Swift 3使用递增整数更新标签节点

时间：2016-11-09 12:18:17

标签： swift sprite-kit

我是编码新手，所以要善待。我在Swift 3中创建了一个类似于Flappy Bird的游戏，并且我的得分节点出了问题。我为分数创建了一个标签节点，但是当玩家联系scoreDetect节点时，不会添加任何分数。我无法弄清楚我是否编码了错误添加点的部分或者我的物理代码是否不正确。任何帮助表示赞赏。谢谢。 

import SpriteKit
import GameplayKit

struct PhysicsCategory {

static let player : UInt32 = 0x1 << 1
static let roof : UInt32 = 0x1 << 2
static let floor : UInt32 = 0x1 << 3
static let lowerObstacle : UInt32 = 0x1 << 4
static let upperObstacle : UInt32 = 0x1 << 5
static let scoreDetect : UInt32 = 0x1 << 6

}

class GameScene: SKScene, SKPhysicsContactDelegate {

var bgColor = UIColor(red: 39/255, green: 41/255, blue: 56/255, alpha: 1.0)
var roof = SKSpriteNode()
var floor = SKSpriteNode()
var lowerObstacle = SKSpriteNode()
var upperObstacle = SKSpriteNode()
var player = SKSpriteNode()
var randomValue = Int()
var scoreDetect = SKSpriteNode()
var scoreLabel = SKLabelNode()
var scoreValue = Int()
var logo = SKSpriteNode()
var gameStarted = Bool()

override func didMove(to view: SKView) {

        createPlayer()
        createTiles()
        createScoreLabel()

        physicsWorld.contactDelegate = self
        self.physicsWorld.gravity = CGVector(dx: 0.0, dy: -4.0)
        backgroundColor = bgColor

        let delay = SKAction.wait(forDuration: 3)
        let repeatingAction = SKAction.run(repeatingSequence)
        let sequence = SKAction.sequence([ delay, repeatingAction ])
        run(SKAction.repeatForever(sequence))

}

// Random Selector For Obstacles

func randomSelector() -> Int {

    let array = [1, 2, 3]
    return  Int(arc4random_uniform(UInt32(array.count)))

}

// Player Rules

func createPlayer() {

    player = SKSpriteNode(imageNamed: "Player")
    player.setScale(0.4)
    player.position = CGPoint(x: -player.size.width, y: 0)
    player.zPosition = 2
    addChild(player)

    player.physicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "Player"), size: player.size)
    player.physicsBody?.categoryBitMask = PhysicsCategory.player
    player.physicsBody?.collisionBitMask = PhysicsCategory.roof | PhysicsCategory.floor | PhysicsCategory.upperObstacle | PhysicsCategory.lowerObstacle | PhysicsCategory.scoreDetect
    player.physicsBody?.contactTestBitMask = PhysicsCategory.roof | PhysicsCategory.floor | PhysicsCategory.upperObstacle | PhysicsCategory.lowerObstacle | PhysicsCategory.scoreDetect
    player.physicsBody?.allowsRotation = false
    player.physicsBody?.affectedByGravity = true
    player.physicsBody?.isDynamic = false

}

// Create Background

func createTiles() {

    roof = SKSpriteNode(imageNamed: "Roof")
    roof.position = CGPoint(x: 0, y: self.frame.height / 2 - roof.size.height / 2)
    roof.zPosition = 1
    addChild(roof)

    roof.physicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "Roof"), size: roof.size)
    roof.physicsBody?.categoryBitMask = PhysicsCategory.roof
    roof.physicsBody?.collisionBitMask = PhysicsCategory.player
    roof.physicsBody?.contactTestBitMask = PhysicsCategory.player
    roof.physicsBody?.allowsRotation = false
    roof.physicsBody?.affectedByGravity = false
    roof.physicsBody?.isDynamic = false

    floor = SKSpriteNode(imageNamed: "Floor")
    floor.position = CGPoint(x: 0, y: -self.frame.height / 2)
    floor.zPosition = 1
    addChild(floor)

    floor.physicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "Floor"), size: floor.size)
    floor.physicsBody?.categoryBitMask = PhysicsCategory.floor
    floor.physicsBody?.collisionBitMask = PhysicsCategory.player
    floor.physicsBody?.contactTestBitMask = PhysicsCategory.player
    floor.physicsBody?.allowsRotation = false
    floor.physicsBody?.affectedByGravity = false
    floor.physicsBody?.isDynamic = false

}

// Obstacle Spawn Rules

func createObstacle() {

    if (randomSelector() == 1) {
        lowerObstacle = SKSpriteNode(imageNamed: "Fire Barrel 1")
        upperObstacle = SKSpriteNode(imageNamed: "Fire Barrel 3")
        scoreDetect = SKSpriteNode(color: UIColor.red, size: CGSize(width: 32, height: frame.height))

        upperObstacle.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width / 2, y: self.frame.height / 2 - upperObstacle.size.height / 2 + 12)
        lowerObstacle.position = CGPoint(x: self.frame.width / 2 + lowerObstacle.size.width / 2, y: -self.frame.height / 2 + lowerObstacle.size.height - 15)
        scoreDetect.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width, y: 0)
    }
    else {
        if (randomSelector() == 2) {
            lowerObstacle = SKSpriteNode(imageNamed: "Fire Barrel 2")
            upperObstacle = SKSpriteNode(imageNamed: "Fire Barrel 2")
            scoreDetect = SKSpriteNode(color: UIColor.red, size: CGSize(width: 32, height: frame.height))

            upperObstacle.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width / 2, y: self.frame.height / 2 - upperObstacle.size.height / 1.9)
            lowerObstacle.position = CGPoint(x: self.frame.width / 2 + lowerObstacle.size.width / 2, y: -self.frame.height / 2 + lowerObstacle.size.height / 1.5)
            scoreDetect.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width, y: 0)
        }
        else {
            lowerObstacle = SKSpriteNode(imageNamed: "Fire Barrel 3")
            upperObstacle = SKSpriteNode(imageNamed: "Fire Barrel 1")
            scoreDetect = SKSpriteNode(color: UIColor.red, size: CGSize(width: 32, height: frame.height))

            upperObstacle.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width / 2, y: self.frame.height / 2 - upperObstacle.size.height / 1.5 + 4)
            lowerObstacle.position = CGPoint(x: self.frame.width / 2 + lowerObstacle.size.width / 2, y: -self.frame.height / 2 + lowerObstacle.size.height / 1.75 + 7)
            scoreDetect.position = CGPoint(x: self.frame.width / 2 + upperObstacle.size.width, y: 0)
        }
    }

    lowerObstacle.zPosition = 2
    lowerObstacle.setScale(0.8)

    lowerObstacle.physicsBody = SKPhysicsBody(rectangleOf: lowerObstacle.size)
    lowerObstacle.physicsBody?.categoryBitMask = PhysicsCategory.lowerObstacle
    lowerObstacle.physicsBody?.collisionBitMask = PhysicsCategory.player
    lowerObstacle.physicsBody?.contactTestBitMask = PhysicsCategory.player
    lowerObstacle.physicsBody?.allowsRotation = false
    lowerObstacle.physicsBody?.affectedByGravity = false
    lowerObstacle.physicsBody?.isDynamic = false

    upperObstacle.zPosition = 2
    upperObstacle.setScale(0.8)

    upperObstacle.physicsBody = SKPhysicsBody(rectangleOf: upperObstacle.size)
    upperObstacle.physicsBody?.categoryBitMask = PhysicsCategory.upperObstacle
    upperObstacle.physicsBody?.collisionBitMask = PhysicsCategory.player
    upperObstacle.physicsBody?.contactTestBitMask = PhysicsCategory.player
    upperObstacle.physicsBody?.allowsRotation = false
    upperObstacle.physicsBody?.affectedByGravity = false
    upperObstacle.physicsBody?.isDynamic = false

    scoreDetect.physicsBody?.categoryBitMask = PhysicsCategory.scoreDetect
    scoreDetect.physicsBody?.collisionBitMask = PhysicsCategory.player
    scoreDetect.physicsBody?.contactTestBitMask = PhysicsCategory.player
    scoreDetect.physicsBody?.allowsRotation = false
    scoreDetect.physicsBody?.affectedByGravity = false
    scoreDetect.physicsBody?.isDynamic = false

    addChild(lowerObstacle)
    addChild(upperObstacle)
    addChild(scoreDetect)
    lowerObstacle.run(
        SKAction.sequence([
            SKAction.wait(forDuration: 6),
            SKAction.removeFromParent()
        ])
    )
    upperObstacle.run(
        SKAction.sequence([
            SKAction.wait(forDuration: 6),
            SKAction.removeFromParent()
        ])
    )
    scoreDetect.run(
        SKAction.sequence([
            SKAction.wait(forDuration: 6),
            SKAction.removeFromParent()
            ])
    )
}

// Create Spawn and Move Sequence

func repeatingSequence() {

    createObstacle()
    let moveLowerObstacle = SKAction.moveBy(x: -self.frame.width - lowerObstacle.size.width * 2, y: 0, duration: 5)
    lowerObstacle.run(moveLowerObstacle)
    let moveUpperObstacle = SKAction.moveBy(x: -self.frame.width - upperObstacle.size.width * 2, y: 0, duration: 5)
    upperObstacle.run(moveUpperObstacle)
    let moveScoreDetect = SKAction.moveBy(x: -self.frame.width - upperObstacle.size.width * 2, y: 0, duration: 5)
    scoreDetect.run(moveScoreDetect)

}

func createScoreLabel() {

    scoreLabel = SKLabelNode(fontNamed: "Arial")
    scoreLabel.fontSize = 22
    scoreLabel.position = CGPoint(x: 305, y: -638)
    scoreLabel.horizontalAlignmentMode = .center
    scoreLabel.verticalAlignmentMode = .center
    scoreLabel.text = "SCORE: \(scoreValue)"
    scoreLabel.fontColor = UIColor.white
    scoreLabel.zPosition = 4

    addChild(scoreLabel)

}

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

    if firstBody.categoryBitMask == PhysicsCategory.scoreDetect && secondBody.categoryBitMask == PhysicsCategory.player || firstBody.categoryBitMask == PhysicsCategory.player && secondBody.categoryBitMask == PhysicsCategory.scoreDetect {
            scoreValue += 1
    }
}

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

    player.physicsBody?.isDynamic = true
    let impulse = CGVector(dx: 0, dy: 200)
    player.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
    player.physicsBody?.applyImpulse(impulse)

}

override func update(_ currentTime: TimeInterval) {

}

}

1 个答案:

答案 0 :(得分：3)

您正在正确更新scoreValue媒体资源。但是，您还需要根据scoreLabel的新值更新scoreValue内显示的内容。

所以替换这个

var scoreValue = Int()

用这个

var scoreValue = Int() {
    didSet {
        scoreLabel.text = self.scoreValue.description
    }
}

现在每次scoreValue更改时，scoreLabel都会自动更新。

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