ios - 为 SpriteKit 中的函数添加延迟

Question

我希望只允许玩家每 0.7 秒发射一枚导弹。我该怎么做呢？这是我的代码。我已经尝试过我在这个网站上找到的其他方法，但它们不起作用。

func fireTorpedo() {
    if !self.player.isPaused
    {
        if isSoundEffect == true {
            self.run(SKAction.playSoundFileNamed("Rocket", waitForCompletion: false))
        }

        let torpedoNode = SKSpriteNode(imageNamed: "Rocket")

        torpedoNode.position = player.position
        torpedoNode.position.y += 5
        torpedoNode.physicsBody = SKPhysicsBody(circleOfRadius: torpedoNode.size.width / 2)
        torpedoNode.physicsBody?.isDynamic = true
        torpedoNode.physicsBody?.categoryBitMask = photonTorpedoCategory
        torpedoNode.physicsBody?.contactTestBitMask = alienCategory
        torpedoNode.physicsBody?.collisionBitMask = 0
        torpedoNode.physicsBody?.usesPreciseCollisionDetection = true

        self.addChild(torpedoNode)

        let animationDuration:TimeInterval = 0.5
        var actionArray = [SKAction]()
        actionArray.append(SKAction.move(to: CGPoint(x: player.position.x, y: self.frame.size.height + 10), duration: animationDuration))
        actionArray.append(SKAction.removeFromParent())
        torpedoNode.run(SKAction.sequence(actionArray))
    }
}

Answer 1

我喜欢这样做:

class GameScene:SKScene {

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

        if action(forKey: "shooting") == nil {

            let wait = SKAction.wait(forDuration: 0.7)
            run(wait, withKey: "shooting")

            print("shot fired")
        }
    }
}

虽然在某个场景中找到了“射击”键，但您不能再射击了。在真实游戏中，这可能是节点的一部分(一个 Action 应该在节点上运行)。