ios - 让玩家双跳 Sprite Kit Swift

Question

我已经为我的播放器实现了一次跳跃。但我希望播放器能够在用户点击两次时进行二段跳。

我如何让下面的这个功能检查跳跃是否仍在持续时间，以便他们可以在需要时再次点击和跳跃？

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

    var isJumping = false
    var isDoubleJumping = false

    if mario.action(forKey: "jump") == nil && isJumping {

        let marioTextureJump = SKTexture(imageNamed: "mariojump.png")

        let animation = SKAction.animate(with: [marioTextureJump], timePerFrame: 0.6)

        mario.run(animation)

        mario.run(jumpAction, withKey: "jump")

        if isJumping {

            isDoubleJumping = true
            isJumping = false
        }

        else {

            isJumping = true
            isDoubleJumping = false
        }
    }
}

Answer 1

实现这一目标的最简单方法可能是向场景中添加 2 个标志

isPlayerJumping = false
isPlayerDoubleJumping = false

然后在您的 touches 函数中检查并设置这些变量

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

    //if the player is already double jumping don't let them jump again until finished
    guard !isDoubleJumping else { return }

    let animation = SKAction.animate(with: [playerTextureJump], timePerFrame: 0.6)

    player.run(animation)

    if isJumping {
        isDoubleJumping = true
        isJumping = false

        player.run(jumpAction, withKey: "jump") {
            self.isDoubleJumping = false
        }
    }
    else {
        isJumping = true

        player.run(jumpAction, withKey: "jump") {
            self.isJumping = false
        }
    }
}

EDIT

如果你不想使用守卫，你可以在适当的地方放置一个if语句

if isPlayerDoubleJumping {
    return
}

在 jumpAction 结束时，您必须运行一段代码来重置变量

SKAction.run {
    isJumping = false
    isDoubleJumping = false
}

你甚至可以像这样在你的触摸开始时改变内联变量......

player.run(jumpAction, withKey: "jump") {
    self.isPlayerJumping = false
    self.isPlayerDoubleJumping = false
}