スウィフトで一度だけジャンプする方法は？

Question

ほとんどのゲームのように、プレーヤーが一度だけジャンプする方法を知りたいです。私はこれを試みた：swift - Jump only when landedしかし、それは実際に私のために働いていなかった理由は、プレイヤーが画面をタップしてスパムし、彼は30回のクリックごとに跳んだときに跳んだだけだったからです。下だ

：ここではそれがどのように見えるかであるクラスGameScene：SkSceneで{

var ableToJump = true 
var Player = SKSpriteNode(imageNamed: "Spieler_rechts") 

：didMoveToView（ビュー：SKView）で

Player.position = CGPoint(x: self.frame.size.width*0.1, y: Ground.frame.size.height + Player.frame.size.height) 
Player.zPosition = 3 
Player.physicsBody = SKPhysicsBody(rectangleOfSize: Player.size) 
Player.physicsBody?.allowsRotation = false 
Player.physicsBody?.affectedByGravity = true 
Player.physicsBody?.restitution = 0 
self.addChild(Player) 

：オーバーライドFUNC更新（ CURRENTTIME：NSTimeInterval）で

if Player.physicsBody?.velocity.dy == 0 { 
    ableToJump = true 
} 
else { 
    ableToJump = false 
} 

：セット、withEvent EV：touchesBegan（タッチFUNCオーバーライドENT：たUIEvent）

if ableToJump == true { 
    Player.physicsBody?.applyImpulse(CGVectorMake(0, 20)) 
} 

Answer 1

ここで私はそれをやった方法は次のとおりです。

EDIT：？

class MainScene: SKScene, SKPhysicsContactDelegate { 

     let colorChanger = ColorChanger() 
     let ground = SKSpriteNode(imageNamed: "Ground") 
     let player = SKSpriteNode(imageNamed: "Player") 
     let block1 = SKSpriteNode(imageNamed: "Block2") 
     let block2 = SKSpriteNode(imageNamed: "Block2") 
     let scoreLabel = SKLabelNode(fontNamed: "Chalkboard SE") 
     let highScoreLabel = SKLabelNode(fontNamed: "Chalkboard SE") 
     let life = SKSpriteNode(imageNamed: "Player") 
     let life2 = SKSpriteNode(imageNamed: "Player") 
     let life3 = SKSpriteNode(imageNamed: "Player") 
     var firstTime = Int() 

     var blockMaxX = CGFloat(0) 
     var origBlockPositionX = CGFloat(0) 
     var score = Int() 
     var highScore = Int() 
     var lives = Int() 

     var groundPositionX = CGFloat(0) 
     var maxBarX = CGFloat(0) 
     var groundSpeed = 5 
     var playerBaseLine = CGFloat(0) 
     var more = CGFloat(0) 

     var onGround = true 
     var velocityY = CGFloat(0) 
     let gravity = CGFloat(1.3) 

     enum Collision:UInt32{ 
      case Player = 1 
      case Block = 2 
     } 



override func didMoveToView(view: SKView) { 
self.physicsWorld.contactDelegate = self 
     let color1 = colorChanger.randomColor() 
     runAction(SKAction.colorizeWithColor(color1, colorBlendFactor: 1, duration: 0.2)) 
     self.ground.anchorPoint = CGPointMake(0, 1) 
     self.ground.position = CGPointMake(CGRectGetMinX(self.frame),CGRectGetMidY(self.frame)-23) 
     self.ground.size = CGSize(width: 1100, height: 4000) 

     self.groundPositionX = self.ground.position.x 
     self.maxBarX = self.ground.size.width - self.frame.size.width - 100 
     self.maxBarX *= -1 

     self.player.size = CGSize(width: 50, height: 50) 
     self.playerBaseLine = self.frame.height/2 
     self.player.position = CGPointMake(CGRectGetMinX(self.frame) + self.player.size.width/1.5 , self.playerBaseLine) 
     self.player.physicsBody = SKPhysicsBody(circleOfRadius: CGFloat(self.player.size.width/2)) 
     self.player.physicsBody!.affectedByGravity = false 
     self.player.physicsBody!.categoryBitMask = Collision.Player.rawValue 
     self.player.physicsBody!.contactTestBitMask = Collision.Block.rawValue 
     self.player.physicsBody!.collisionBitMask = Collision.Block.rawValue 

override func update(currentTime: NSTimeInterval) { 

      self.velocityY += self.gravity 
      self.player.position.y -= velocityY 

      if self.player.position.y < self.playerBaseLine { 
       self.player.position.y = self.playerBaseLine 
       velocityY = 0.0 
       onGround = true 
      } 
    } 

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
      if self.onGround{ 
       self.velocityY = -18.0 
       self.onGround = false 
      } 
    } 

あなたが重力でプレーする必要があります。）