Swift 如果播放机正在触摸屏幕，如何检查每个帧？

如何检查播放机是否每帧都触摸屏幕？我想要一些类似的东西，当你在游戏几何短跑中一直触摸屏幕时，如果你触摸到地面，你就会一直跳跃。我试过了，但没有成功：

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

---

请尝试以下代码：

var isTouching = false

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

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    isTouching = false
}

var isTouching=false
覆盖func TouchesBegind（Touchs:Set，带有事件：UIEvent？）{
isTouching=true
}
覆盖函数touchesend（touchs:Set，带有事件：UIEvent？）{
isTouching=false
}

请尝试以下代码：

var isTouching = false

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

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    isTouching = false
}

var isTouching=false
覆盖func TouchesBegind（Touchs:Set，带有事件：UIEvent？）{
isTouching=true
}
覆盖函数touchesend（touchs:Set，带有事件：UIEvent？）{
isTouching=false
}

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

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    isTouching = false
}

if isTouching == true { 
   do something 
}
else {
   do something else 
}