昨天介紹完 SpriteKit 的建檔，今天會介紹程式碼的部分

• GameScene.sks

  遊戲場景的格局設置

  

• GameViewController.swift

  mport UIKit
  mport SpriteKit    // 創建遊戲和其他圖形密集型應用程序，在二維中繪製形狀、粒子、文本、圖像和視頻
  mport GameplayKit  // 融入常見的遊戲行為，例如隨機數生成、人工智能、尋路和代理行為。
  
  lass GameViewController: UIViewController {
  
  override func viewDidLoad() {
  	super.viewDidLoad()
  
  	if let view = self.view as! SKView? {
  
  		// 從 "GameScene.sks" 加载 "SKScene"
  		if let scene = SKScene(fileNamed: "GameScene") {
  
  			// 將縮放模式設置為適合裝置的縮放比例
  			scene.scaleMode = .aspectFill
  
  			// 呈現場景
  			view.presentScene(scene)
  		}
  
  		// 忽略遍歷順序，需要在場景中使用 zPosition，以正確保證元素在彼此的前面或後面
  		view.ignoresSiblingOrder = true
  
  		// 顯示性能統計信息(fps、nodes)
  		view.showsFPS = true
  		view.showsNodeCount = true
  	}
  }
  
  // 是否自動旋轉
  override var shouldAutorotate: Bool {
  	return true
  }
  
  // UI 界面的遮罩
  override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
  
  	// 使用者介面
  	if UIDevice.current.userInterfaceIdiom == .phone {
  		return .allButUpsideDown
  	} else {
  		return .all
  	}
  }
  
  // 狀態欄隱藏
  override var prefersStatusBarHidden: Bool {
  	return true
  }
  
  ``
  
  

• GameScene.swift

  mport SpriteKit
  mport GameplayKit
  
  lass GameScene: SKScene {
  
  private var label : SKLabelNode?
  private var spinnyNode : SKShapeNode?
  
  override func didMove(to view: SKView) {
  
  	// 從場景中獲取標籤節點
  	self.label = self.childNode(withName: "//helloLabel") as? SKLabelNode
  	if let label = self.label {
  		label.alpha = 0.0
  		label.run(SKAction.fadeIn(withDuration: 2.0))
  	}
  
  	// 創建游標在裝置上呈現的的形狀節點
  	let w = (self.size.width + self.size.height) * 0.05
  	self.spinnyNode = SKShapeNode.init(rectOf: CGSize.init(width: w, height: w), cornerRadius: w * 0.3)
  
  	if let spinnyNode = self.spinnyNode {
  
  		// 節點線條的寬度
  		spinnyNode.lineWidth = 2.5
  
  		// 節點的動畫效果呈現
  		spinnyNode.run(SKAction.repeatForever(SKAction.rotate(byAngle: CGFloat(Double.pi), duration: 1)))
  		spinnyNode.run(SKAction.sequence([SKAction.wait(forDuration: 0.5),
  										  SKAction.fadeOut(withDuration: 0.5),
  										  SKAction.removeFromParent()]))
  	}
  }
  
  // 按下時，會出現綠色節點
  func touchDown(atPoint pos : CGPoint) {
  	if let n = self.spinnyNode?.copy() as! SKShapeNode? {
  		n.position = pos
  		n.strokeColor = SKColor.green
  		self.addChild(n)
  	}
  }
  
  // 拖曳時，會出現藍色節點
  func touchMoved(toPoint pos : CGPoint) {
  	if let n = self.spinnyNode?.copy() as! SKShapeNode? {
  		n.position = pos
  		n.strokeColor = SKColor.blue
  		self.addChild(n)
  	}
  }
  
  // 放開後，會出現紅色節點
  func touchUp(atPoint pos : CGPoint) {
  	if let n = self.spinnyNode?.copy() as! SKShapeNode? {
  		n.position = pos
  		n.strokeColor = SKColor.red
  		self.addChild(n)
  	}
  }
  
  // 按下後，畫面上的 "Hello, World!" 會閃爍一下
  override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
  	if let label = self.label {
  		label.run(SKAction.init(named: "Pulse")!, withKey: "fadeInOut")
  	}
  	for t in touches { self.touchDown(atPoint: t.location(in: self)) }
  }
  
  // 拖曳
  override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
  	for t in touches { self.touchMoved(toPoint: t.location(in: self)) }
  }
  
  // 游標放開
  override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
  	for t in touches { self.touchUp(atPoint: t.location(in: self)) }
  }
  
  // 游標取消
  override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
  	for t in touches { self.touchUp(atPoint: t.location(in: self)) }
  }
  
  // 更新
  override func update(_ currentTime: TimeInterval) {
  	// 畫面每一幀前皆會被調用
  }
  
  ``
  
  

GitHub - SpriteKitDemo