Swiftで繰り返し処理を活用したゲームループの実装方法

var isRunning = true
while isRunning {
    // ゲームの更新処理
}

for enemy in enemies {
    // 敵の更新処理
}

let gameTimer = Timer.scheduledTimer(withTimeInterval: 1.0 / 60.0, repeats: true) { _ in
    // 1秒間に60回の処理を実行
    updateGame()
}

let gameTimer = Timer.scheduledTimer(withTimeInterval: 1.0 / 60.0, repeats: true) { _ in
    // 60FPSでゲームを更新
    updateGame()
}

var lastUpdateTime: TimeInterval = 0

func updateGame() {
    let currentTime = Date().timeIntervalSince1970
    let deltaTime = currentTime - lastUpdateTime
    lastUpdateTime = currentTime

    // deltaTimeを使用してキャラクターの位置や速度を更新
    updateCharacterPosition(deltaTime: deltaTime)
}

var gameTimer: Timer?
var isRunning = true

func startGameLoop() {
    gameTimer = Timer.scheduledTimer(withTimeInterval: 1.0 / 60.0, repeats: true) { _ in
        if isRunning {
            processInput()   // 入力の取得
            updateGameState() // ゲーム状態の更新
            renderGame()     // 描画の実行
        }
    }
}

func stopGameLoop() {
    gameTimer?.invalidate()
    gameTimer = nil
}

func processInput() {
    // キー入力やタッチ操作を処理
}

func updateGameState() {
    // キャラクターやオブジェクトの状態を更新
}

func renderGame() {
    // ゲームの描画処理を実行
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {
        let location = touch.location(in: self)
        handleTouch(at: location)
    }
}

func handleTouch(at location: CGPoint) {
    // タッチ位置に基づいてキャラクターの動作を決定
    moveCharacter(to: location)
}

override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
    for press in presses {
        if let key = press.key {
            handleKeyPress(key)
        }
    }
}

func handleKeyPress(_ key: UIKey) {
    switch key.characters {
    case "w":
        moveCharacterUp()
    case "a":
        moveCharacterLeft()
    case "s":
        moveCharacterDown()
    case "d":
        moveCharacterRight()
    default:
        break
    }
}

var isMovingLeft = false
var isMovingRight = false

func processInput() {
    // キーが押されているかの状態を確認
    if isMovingLeft {
        moveCharacterLeft()
    }
    if isMovingRight {
        moveCharacterRight()
    }
}

// キーが押された際の処理
func handleKeyPress(_ key: UIKey) {
    switch key.characters {
    case "a":
        isMovingLeft = true
    case "d":
        isMovingRight = true
    default:
        break
    }
}

// キーが離された際の処理
func handleKeyRelease(_ key: UIKey) {
    switch key.characters {
    case "a":
        isMovingLeft = false
    case "d":
        isMovingRight = false
    default:
        break
    }
}

var lastJumpTime: TimeInterval = 0
let jumpCooldown: TimeInterval = 0.5

func processJump() {
    let currentTime = Date().timeIntervalSince1970
    if currentTime - lastJumpTime >= jumpCooldown {
        jump()
        lastJumpTime = currentTime
    }
}

var playerPosition = CGPoint(x: 100, y: 100)
var playerVelocity = CGPoint(x: 0, y: 0)

func updatePlayer(deltaTime: TimeInterval) {
    // プレイヤーの速度を位置に反映
    playerPosition.x += playerVelocity.x * CGFloat(deltaTime)
    playerPosition.y += playerVelocity.y * CGFloat(deltaTime)

    // 画面内にプレイヤーがとどまるよう制限をかける
    playerPosition.x = max(0, min(screenWidth, playerPosition.x))
    playerPosition.y = max(0, min(screenHeight, playerPosition.y))
}

var enemyPosition = CGPoint(x: 500, y: 100)
let enemySpeed: CGFloat = 50

func updateEnemy(deltaTime: TimeInterval) {
    // プレイヤーの位置に向かって敵が動く
    let direction = CGPoint(x: playerPosition.x - enemyPosition.x, y: playerPosition.y - enemyPosition.y)
    let distance = sqrt(direction.x * direction.x + direction.y * direction.y)

    if distance > 0 {
        let normalizedDirection = CGPoint(x: direction.x / distance, y: direction.y / distance)
        enemyPosition.x += normalizedDirection.x * enemySpeed * CGFloat(deltaTime)
        enemyPosition.y += normalizedDirection.y * enemySpeed * CGFloat(deltaTime)
    }
}

var score = 0
var items: [CGPoint] = [CGPoint(x: 200, y: 200), CGPoint(x: 300, y: 400)]

func updateItems() {
    for (index, itemPosition) in items.enumerated() {
        if distanceBetween(playerPosition, itemPosition) < 50 {
            // プレイヤーがアイテムに接触した場合、アイテムを削除しスコアを増加
            items.remove(at: index)
            score += 100
            break
        }
    }
}

func distanceBetween(_ point1: CGPoint, _ point2: CGPoint) -> CGFloat {
    return sqrt(pow(point1.x - point2.x, 2) + pow(point1.y - point2.y, 2))
}

var isGameOver = false

func updateGameState() {
    if playerHealth <= 0 {
        isGameOver = true
    }

    if allEnemiesDefeated() {
        advanceToNextLevel()
    }
}

func allEnemiesDefeated() -> Bool {
    return enemies.isEmpty
}

func advanceToNextLevel() {
    // 次のレベルに進む処理
}

func renderScene() {
    for object in gameObjects {
        if isInView(object.position) {
            object.draw()
        }
    }
}

func isInView(_ position: CGPoint) -> Bool {
    return position.x >= 0 && position.x <= screenWidth && position.y >= 0 && position.y <= screenHeight
}

let spriteBatchNode = SKNode()
for sprite in sprites {
    spriteBatchNode.addChild(sprite)
}
// 一度にすべてのスプライトを描画
scene.addChild(spriteBatchNode)

scene.view?.preferredFramesPerSecond = 60  // 60FPSに設定

UIGraphicsBeginImageContext(view.frame.size)
let context = UIGraphicsGetCurrentContext()

// オフスクリーンで描画処理を行う
drawGameScene(context: context!)

// 描画が完了したら、一度に画面へ転送
let finalImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

let textureAtlas = SKTextureAtlas(named: "sprites")
let sprite = SKSpriteNode(texture: textureAtlas.textureNamed("character"))

func updateGame() {
    let currentTime = Date().timeIntervalSince1970
    let deltaTime = currentTime - lastUpdateTime

    if deltaTime < 1.0 / 60.0 {
        // フレームスキップ処理
        return
    }

    // フレームをスキップしなかった場合、ゲームを更新
    lastUpdateTime = currentTime
    updateGameState()
    renderScene()
}

func checkCollision(_ object1: CGRect, _ object2: CGRect) -> Bool {
    return object1.intersects(object2)
}

func checkCircularCollision(_ center1: CGPoint, _ radius1: CGFloat, _ center2: CGPoint, _ radius2: CGFloat) -> Bool {
    let distance = sqrt(pow(center2.x - center1.x, 2) + pow(center2.y - center1.y, 2))
    return distance < (radius1 + radius2)
}

let player = SKSpriteNode(imageNamed: "player")
player.physicsBody = SKPhysicsBody(circleOfRadius: player.size.width / 2)
player.physicsBody?.categoryBitMask = PhysicsCategory.Player
player.physicsBody?.collisionBitMask = PhysicsCategory.Enemy
player.physicsBody?.contactTestBitMask = PhysicsCategory.Enemy

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

    if bodyA.categoryBitMask == PhysicsCategory.Player && bodyB.categoryBitMask == PhysicsCategory.Enemy {
        // プレイヤーと敵が衝突した際の処理
        handlePlayerCollisionWithEnemy()
    }
}

let ball = SKSpriteNode(imageNamed: "ball")
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.width / 2)
ball.physicsBody?.affectedByGravity = true
ball.physicsBody?.restitution = 0.8  // 反発力
ball.physicsBody?.friction = 0.5     // 摩擦力

class QuadTree {
    // クアッドツリーによるオブジェクト管理
}

player.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 100))  // ジャンプ

class Player {
    var name: String
    var weapon: Weapon?

    init(name: String) {
        self.name = name
    }
}

class Weapon {
    weak var player: Player?

    init(player: Player) {
        self.player = player
    }
}

func loadTexture(named: String) -> SKTexture? {
    if let cachedTexture = textureCache[named] {
        return cachedTexture
    } else {
        let texture = SKTexture(imageNamed: named)
        textureCache[named] = texture
        return texture
    }
}

func loadLevelAssets(level: Int) {
    // レベルに応じて必要なアセットのみをロード
    if level == 1 {
        loadTexture(named: "level1_background")
        loadSound(named: "level1_music")
    } else if level == 2 {
        loadTexture(named: "level2_background")
        loadSound(named: "level2_music")
    }
}

func updateHeavyProcess() {
    DispatchQueue.global(qos: .background).async {
        for _ in 0..<100 {
            // 重い処理をバックグラウンドで実行
        }
        DispatchQueue.main.async {
            // メインスレッドに結果を反映
        }
    }
}

// InstrumentsでメモリやCPUのパフォーマンスを監視

class ObjectPool<T> {
    private var availableObjects: [T] = []

    func get() -> T? {
        return availableObjects.popLast()
    }

    func release(_ object: T) {
        availableObjects.append(object)
    }
}

func updateGameObjects() {
    for object in gameObjects {
        if object.needsUpdate {
            object.update()
        }
    }
}

// ブレークポイントを設定したい行に置く
print("デバッグポイント")

// Instrumentsを使ってリアルタイムでモニタリング

import XCTest

class GameTests: XCTestCase {
    func testPlayerMovement() {
        let player = Player()
        player.move(to: CGPoint(x: 100, y: 100))
        XCTAssertEqual(player.position, CGPoint(x: 100, y: 100))
    }
}

func testMenuNavigation() {
    let app = XCUIApplication()
    app.launch()
    app.buttons["StartGame"].tap()
    XCTAssertTrue(app.staticTexts["GameScreen"].exists)
}

func movePlayer(to position: CGPoint) {
    print("Player is moving to \(position)")
    self.position = position
}

# GitHub Actionsの例
name: Swift CI

on: [push]

jobs:
  build:
    runs-on: macos-latest
    steps:
    - uses: actions/checkout@v2
    - name: Build and Test
      run: xcodebuild test -scheme MyGameProject

func testPlayerMovementPerformance() {
    measure {
        let player = Player()
        player.move(to: CGPoint(x: 100, y: 100))
    }
}

import SpriteKit

class GameScene: SKScene, SKPhysicsContactDelegate {

    let player = SKSpriteNode(imageNamed: "player")
    var enemies: [SKSpriteNode] = []
    var coins: [SKSpriteNode] = []
    var score = 0

    override func didMove(to view: SKView) {
        physicsWorld.contactDelegate = self

        // プレイヤー設定
        player.position = CGPoint(x: size.width * 0.1, y: size.height * 0.5)
        player.physicsBody = SKPhysicsBody(circleOfRadius: player.size.width / 2)
        player.physicsBody?.categoryBitMask = PhysicsCategory.Player
        player.physicsBody?.collisionBitMask = PhysicsCategory.Enemy
        player.physicsBody?.contactTestBitMask = PhysicsCategory.Coin | PhysicsCategory.Enemy
        addChild(player)

        // コインと敵の初期配置
        spawnEnemies()
        spawnCoins()
    }

    // 敵の生成
    func spawnEnemies() {
        for _ in 0..<3 {
            let enemy = SKSpriteNode(imageNamed: "enemy")
            enemy.position = CGPoint(x: CGFloat.random(in: size.width * 0.5...size.width), y: CGFloat.random(in: 0...size.height))
            enemy.physicsBody = SKPhysicsBody(circleOfRadius: enemy.size.width / 2)
            enemy.physicsBody?.categoryBitMask = PhysicsCategory.Enemy
            addChild(enemy)
            enemies.append(enemy)
        }
    }

    // コインの生成
    func spawnCoins() {
        for _ in 0..<5 {
            let coin = SKSpriteNode(imageNamed: "coin")
            coin.position = CGPoint(x: CGFloat.random(in: size.width * 0.5...size.width), y: CGFloat.random(in: 0...size.height))
            coin.physicsBody = SKPhysicsBody(circleOfRadius: coin.size.width / 2)
            coin.physicsBody?.categoryBitMask = PhysicsCategory.Coin
            coin.physicsBody?.contactTestBitMask = PhysicsCategory.Player
            coin.physicsBody?.isDynamic = false
            addChild(coin)
            coins.append(coin)
        }
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let location = touch.location(in: self)
        player.position = location
    }
}

override func update(_ currentTime: TimeInterval) {
    for enemy in enemies {
        let direction = CGPoint(x: player.position.x - enemy.position.x, y: player.position.y - enemy.position.y)
        let distance = sqrt(direction.x * direction.x + direction.y * direction.y)
        let moveAmount = CGPoint(x: direction.x / distance * 1.5, y: direction.y / distance * 1.5)
        enemy.position = CGPoint(x: enemy.position.x + moveAmount.x, y: enemy.position.y + moveAmount.y)
    }
}

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

    if bodyA.categoryBitMask == PhysicsCategory.Player && bodyB.categoryBitMask == PhysicsCategory.Coin {
        // コインを取得
        bodyB.node?.removeFromParent()
        score += 10
    } else if bodyA.categoryBitMask == PhysicsCategory.Player && bodyB.categoryBitMask == PhysicsCategory.Enemy {
        // 敵と接触した場合、ゲームオーバー
        gameOver()
    }
}

func gameOver() {
    print("Game Over! Score: \(score)")
    // ゲームオーバー処理を実装（例：リスタートボタンの表示）
}

override func didSimulatePhysics() {
    for enemy in enemies {
        if !isInView(enemy.position) {
            enemy.removeFromParent()
        }
    }
}

let scoreLabel = SKLabelNode(text: "Score: 0")
scoreLabel.position = CGPoint(x: size.width * 0.5, y: size.height * 0.9)
scoreLabel.fontSize = 24
scoreLabel.fontColor = .white
addChild(scoreLabel)

override func update(_ currentTime: TimeInterval) {
    scoreLabel.text = "Score: \(score)"
}

func checkLevelUp() {
    if score >= 50 {
        spawnMoreEnemies()
        increaseEnemySpeed()
    }
}