Question

我在游戏中有一个Sprite节点，当被触摸时，它会执行被按下节点的操作，并在触摸开始时调用事件，然后在调用触摸结束事件时返回到正常大小。我的问题是当我按下节点然后将手指移到节点之外时，我将手指从屏幕上移开后并没有恢复到其原始大小。

我尝试在代码的“触摸移动”部分中使用多项操作，以尝试在保持触摸的同时将手指移出节点之外，但使其恢复到原始大小，但此操作不起作用。我的代码在下面

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

    let touch: UITouch = touches.first!
    let node = self.atPoint(touch.location(in: self))
    let pushdown = SKAction.scale(to: 0.8, duration: 0.1)

    if node == mainMenu.settingsButton {
        node.run(pushdown)

    } else if node == mainMenu.viewMapButton {
        node.run(pushdown)

    }else if node == mainMenu.shopButton {
        node.run(pushdown)
    }

}

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

    let touch: UITouch = touches.first!
    var location: CGPoint = touch.location(in: self)
    let node: SKNode = atPoint(location)
    let pushUp = SKAction.scale(to: 1.0, duration: 0.2)

    if node != mainMenu.settingsButton {
        //node.run(pushUp)

    } else if touch.phase == .moved || touch.phase == .cancelled {

        node.run(pushUp)

    }

}

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

    let touch: UITouch = touches.first!
    let node = self.atPoint(touch.location(in: self))
    let pushUp = SKAction.scale(to: 1.0, duration: 0.2)

    if node == mainMenu.settingsButton {
        node.run(pushUp)
        //Run Sound Here

        let scene = SettingsMenu(fileNamed:"SettingsMenu")
        scene?.scaleMode = .aspectFill
        //scene?.backgroundColor = UIColor.lightGray
        let transition = SKTransition.crossFade(withDuration: 0.5)
        self.scene?.view?.presentScene(scene!, transition: transition)

    } else if node == mainMenu.viewMapButton {
        node.run(pushUp)
    }
}

在保持接触的同时将手指移到节点位置之外后，如何恢复到原始大小？

Answer 1

在touchesBegan，touchesMoved，touchesEnded中，您始终引用当前节点。 let node = self.atPoint(touch.location(in: self)) 为什么不保留对在touches中检测到的初始节点的引用，如果当前节点atPoint不等于初始节点，则开始对其进行缩放。我认为这可以解决您的问题。

编辑：

要在第一次触摸时捕获节点...

private var currentTouchedNode : SKNode?

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

        let touch: UITouch = touches.first!
        currentTouchedNode = self.atPoint(touch.location(in: self))
        let pushdown = SKAction.scale(to: 0.8, duration: 0.1)

        if currentTouchedNode == mainMenu.settingsButton {
            currentTouchedNode.run(pushdown)

        } else if currentTouchedNode == mainMenu.viewMapButton {
            currentTouchedNode.run(pushdown)

        }else if currentTouchedNode == mainMenu.shopButton {
            currentTouchedNode.run(pushdown)
        }

    }

在touchesMoved，touchesEnded中，您可以比较当前节点是否等于currentTouchedNode并在需要时调整其大小

触摸事件不使SpriteNode在离开节点位置时重置其大小

1 个答案: