如何为Flappybird添加游戏级别？

Question

这可能有点令人困惑。

这是我的覆盖功能ATM，我的墙每2秒产生一次。

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


    if gameStarted == false{

        gameStarted = true

        mexican.physicsBody?.affectedByGravity = true


        let spawn = SKAction.run({
            () in

            self.createWalls()

        })
        let delay = SKAction.wait(forDuration: 2.0)
        let spawnDelay = SKAction.sequence([delay, spawn])
        let spawnDelayForever = SKAction.repeatForever(spawnDelay)
        self.run(spawnDelayForever)


        let distance = CGFloat(self.frame.width + wallPair.frame.width)
        let movePipes = SKAction.moveBy(x: -distance - 50, y: 0, duration: TimeInterval( 0.01 * distance))
        let removePipes = SKAction.removeFromParent()
        moveAndRemove = SKAction.sequence([movePipes,removePipes])

        mexican.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
        mexican.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 65))

我找到了一个教程，其中墙的生成持续时间更快，但我不确定如何将它合并到我的代码中，因为他们使用了新的功能。

我的围墙正在覆盖功能中产生，这使我在添加if语句时很难调用它。

     func startNewLevel(){

           levelNumber += 1

           if self.actionForKey("spawningEnemies") != nil{
           self.removeActionForKey("spawningEnemies")
           }

           var levelDuration = timeInterval()
           switch levelNumber {
           case 1: levelDuration = 2.0
           case 2: levelDuration = 1.8
           case 3: levelDuration = 1.6
           default: levelDuration = 0.5
           print("Cannot find level into")
           }

           let spawn = SKAction.run(spawnEnemy)
           let waitToSpawn = SKAction.waitForDuration(levelDuration)
           let spawnSequence = SKAction.sequence([waitToSpawn, spawn])
           let spawnForever = SKAction.repeatActionForever(spawnSequence)
           self.runAction(spawnForever, withKey: "spawningEnemies")

这是我将调用函数startNewLevel（）的地方，但是我的墙生成是在override func的touchBegan中设置的。

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

    if firstBody.categoryBitMask == physicsCategory.bird && secondBody.categoryBitMask == physicsCategory.wall{


        score += 1
        scoreLabel.text = "\(score)"
        firstBody.node?.removeFromParent()

        if score == 10 || score == 15 || score == 20{
        startNewLevel()

        if score > UserDefaults().integer(forKey: "HIGHSCORE") {
            saveHighScore()


        }

    }
    else if firstBody.categoryBitMask == physicsCategory.bird && secondBody.categoryBitMask == physicsCategory.wall{

        score += 1
        scoreLabel.text = "\(score)"
        secondBody.node?.removeFromParent()


        if score > UserDefaults().integer(forKey: "HIGHSCORE") {
            saveHighScore()

        }

    }

这可能真的令人困惑，但如果有人得到我HOLA，你将成为我在地球上最喜欢的人。