Question

我为我的播放器实现了一次跳转。但是如果用户点击两次，我希望玩家能够双跳。

如何在下方执行此功能，检查跳转是否仍在持续时间内，以便他们可以根据需要再次点按并跳转？

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在场景中添加2个标志

isPlayerJumping = false
isPlayerDoubleJumping = false

然后检查并在触摸功能中设置这些变量

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
        }
    }
}

修改

如果你不想使用警卫，你可以放置一个if statement

if isPlayerDoubleJumping {
    return
}

在jumpAction结束时，你必须运行一段代码来重置变量

SKAction.run {
    isJumping = false
    isDoubleJumping = false
}

你甚至可以在触摸中改变内联变量，就像这样......

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

让玩家双跳Sprite Kit Swift

1 个答案: