需要帮助在按下精灵节点按钮时给它一个动画

Question

我确定我听起来像个菜鸟，但我正在开发我的第一个 iOS 游戏，它包括一个射击按钮，这是一个街机风格的按钮，我想通过切换到"shootPressed" 图像，同时用户按住它然后在释放时交换回来。在这里，我的触摸开始、移动和结束。请记住，我遗漏了任何不冲突的代码。这两天一直被这个问题困扰。

更新：我包含了用于创建按钮节点的函数

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

        if(node.name == "Shoot") {
            shootButton.texture = SKTexture(imageNamed: "shootPushed")
        }
    }
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {
        let location = touch.location(in:self)
        let node = self.atPoint(location)
        if (node.name == "Shoot") {
            shootBeams()
            shootButton.texture = SKTexture(imageNamed: "shootUnpushed" )
        }
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {
        let location = touch.location(in:self)
        let node = self.atPoint(location)
        if node.name == ("shoot") {
            shootButton.texture = SKTexture(imageNamed: "shootPushed")
        }
    }
}    

func addButtons() {
        var buttonT1 = SKTexture(imageNamed: "shootUnpushed")
        var buttonT2 = SKTexture(imageNamed: "shootPushed")

        var shootButton = SKSpriteNode(texture: buttonT1)                        
        shootButton.name = "Shoot"
        shootButton.position = CGPoint(x: self.frame.maxX - 130, y: leftButton.position.y)
        shootButton.zPosition = 7
        shootButton.size = CGSize(width: shootButton.size.width*0.2, height: shootButton.size.height*0.2)
        self.addChild(shootButton)
 }

Answer 1

你在addButtons中创建的shootButton是一个局部变量。

因此，当您在 touchesMoved 中执行 shootButton.texture = SKTexture(imageNamed: "shootPushed") 时，这肯定不是指同一个节点。

因为这显然可以编译，所以这意味着您在 class 中已经有一个属性 shootButton。如果您更改 addButtons 函数中的 var shootButton = SKSpriteNode(texture: buttonT1)，问题很可能会得到解决。

它应该简单地初始化 shootButton-属性而不是创建一个新的 local 变量：

func addButtons() {
        shootButton = SKSpriteNode(texture: buttonT1)    
        shootButton.name = "Shoot"
        shootButton.position = CGPoint(x: self.frame.maxX - 130, y: leftButton.position.y)
        shootButton.zPosition = 7
        shootButton.size = CGSize(width: shootButton.size.width*0.2, height: shootButton.size.height*0.2)
        self.addChild(shootButton) 
}

需要帮助在按下精灵节点按钮时给它一个动画

Need Help giving sprite node button an animation while it is being pressed

animation

ios

skspritenode

swift