如何使用精灵套件场景同时动画和移动玩家节点？

Question

我正在开发一个带有joystick library 的小型ios 游戏。我的问题是在计算了操纵杆前进的方向之后，我希望角色变为正在运行的动画（我使用 .sks 文件实现动画）。它几乎可以工作，除非在动画开始之后，它会停止并且直到玩家放开摇杆才结束。我的一些代码在下面。任何帮助表示赞赏。

设置摇杆的功能：

func setupJoystick() {
    addChild(analogJoyStick)

    analogJoyStick.trackingHandler = { [unowned self] data in
        self.thePlayer.position = CGPoint(x: self.thePlayer.position.x + (data.velocity.x * 0.04), y: self.thePlayer.position.y + (data.velocity.y * 0.04))

        let degrees = self.analogJoyStick.data.angular * 360 / (2 * .pi)
        if degrees > 0 {
         let walkAnimation:SKAction = SKAction(named: "WalkLeft")!
         self.thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")
        } else if degrees < 0 {
         let walkAnimation:SKAction = SKAction(named: "WalkRight")!
         self.thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")
        }
    }

    analogJoyStick.beginHandler = { [unowned self] in
        let degrees = self.analogJoyStick.data.angular * 360 / (2 * .pi)
        if degrees > 0 {
            let walkAnimation:SKAction = SKAction(named: "WalkLeft")!
            self.thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")
        } else if degrees < 0 {
            let walkAnimation:SKAction = SKAction(named: "WalkRight")!
            self.thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")
        }
    }

    analogJoyStick.stopHandler = { [unowned self] in
        self.thePlayer.removeAction(forKey: "animating")
    }
}

这是编码的视觉效果： Spritekit Demo

Answer 1

我阅读了joystick library 说明并看到了两种可以使用的方法（处理程序）：

var beginHandler: (() -> Void)? // before move
var stopHandler: (() -> Void)? // after move

在beginHandler() 中添加（重复的）行走动画：

let walkAnimation: SKAction = SKAction(named: theAnimation)!
thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")

并删除stopHandler()中的动作

thePlayer.removeAction(forKey: "animating")

或使用闭包（也来自文档）：

joystick.beginHandler = { [unowned self] in
  let walkAnimation: SKAction = SKAction(named: ".sks")!
  self.thePlayer.run(SKAction.repeatForever(walkAnimation), withKey: "animating")
}

joystick.stopHandler = { [unowned self] in
  self.thePlayer.removeAction(forKey: "animating")
}