使用Xcode中的滑块创建倒计时手表

大家好,我需要帮助。

我试图创造一个倒计时手表可以倒计时从小时,分钟和秒。现在我只能创建秒的倒计时,但我希望应用程序能够更新秒,分钟和小时,当我与滑块“滑动”。我发现很难正确更新标签并在应用程序中添加“小时和分钟”。谁能帮我弄清楚逻辑吗。

这是我到目前为止编写的代码,只需几秒钟即可正常工作。。我还添加了一个音频文件,您可以在代码中看到,它将在最后播放。

class ViewController: UIViewController {

var secondsCount = 30;
var timer = Timer()
var audioPlayer = AVAudioPlayer()

@IBOutlet weak var label: UILabel!
@IBOutlet weak var labelmin: UILabel!


    // Slideren som slider tid for sal 1
@IBOutlet weak var sliderOutlet: UISlider!
@IBAction func slider(_ sender: UISlider)
{
    //Live changes the numbers
    secondsCount = Int(sender.value)
    label.text = String(secondsCount) + " Seconds"

}


    //Start button
@IBOutlet weak var startOutlet: UIButton!
@IBAction func start(_ sender: Any)
{
        //Nederstående kode aktiverer funktionen counter()
    timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.counter), userInfo: nil, repeats: true)

    sliderOutlet.isHidden = true
    startOutlet.isHidden = true
}

    //Counter function
func counter() {
    secondsCount -= 1

    label.text = String(secondsCount) + " Seconds"

    if (secondsCount == 0)
    {
        timer.invalidate()

        audioPlayer.play()
    }
}

    //Stop button
@IBOutlet weak var stopOutlet: UIButton!
@IBAction func stop(_ sender: Any)
{
    timer.invalidate()
    secondsCount = 30
    sliderOutlet.setValue(30, animated: true)
    label.text = "30 Seconds"

    audioPlayer.stop()

    sliderOutlet.isHidden = false
    startOutlet.isHidden = false
}


    // viewDidLoad

override func viewDidLoad()
{
    super.viewDidLoad()

    do
    {
        let audioPath = Bundle.main.path(forResource: "1", ofType: ".mp3")

        try audioPlayer = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath!))

    }
    catch
    {
        //ERROR
    }



}