如何与SKSpriteNode同时移动和跳跃

Question

目前，我可以使用两个按钮进行跳跃和移动。它们是SKSpriteNodes，我使每个动作都在被触摸时发生。我面临的问题是，当我按下一个按钮时，该动作起作用，而当我按下另一个按钮时，另一个动作停止，因为不再触摸该按钮。我正在尝试允许用户同时移动和跳跃。例如，按住左按钮并按下跳转按钮。

 // MARK: Touches
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {
        let pointTouched = touch.location(in: cameraNode)
        if leftArrow.contains(pointTouched)
        {
            leftArrow.alpha = 0.5
            moveWizard(moveBy: -300, forTheKey: "moveX")
            wizardRunAnimation()
            wizardCharacter.xScale = -1
        }
        if rightArrow.contains(pointTouched)
        {
            rightArrow.alpha = 0.5
            moveWizard(moveBy: 430, forTheKey: "moveX")
            wizardRunAnimation()
            wizardCharacter.xScale = 1
        }
        if attackButton.contains(pointTouched)
        {
            attackButton.alpha = 0.5
            wizardAttackAnimation()
        }
        if upArrow.contains(pointTouched)
        {
            upArrow.alpha = 0.5
            jumpWizard(forTheKey: "jumped")
            jumpWizardAnimation(fortheKey: "jumpedAnimation")
        }
    }
}
func alpha() {
    leftArrow.alpha = 1
    rightArrow.alpha = 1
    attackButton.alpha = 1
    upArrow.alpha = 1
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {
        let pointTouched = touch.location(in: cameraNode)
        if leftArrow.contains(pointTouched)
        {
            wizardCharacter.removeAction(forKey: "moveX")
        if rightArrow.contains(pointTouched)
        {
            wizardCharacter.removeAction(forKey: "moveX")
        }
        if attackButton.contains(pointTouched)
        {
            wizardCharacter.removeAction(forKey: "wizardRun")
        }
        if upArrow.contains(pointTouched)
        {
           wizardCharacter.removeAction(forKey: "jumped")
        }
    }