在UIViewController显示为3DTouch预览时检测UITouches

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    // 处理触摸开始事件
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    // 处理触摸移动事件
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    // 处理触摸结束事件
}

override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
    // 处理触摸取消事件
}

for touch in touches {
    let location = touch.location(in: self.view)
    // 处理触摸位置信息
}