如何使用swift在进度条上显示AVAudioPlayer？

import AVFoundation

guard let audioURL = Bundle.main.url(forResource: "audio", withExtension: "mp3") else {
    return
}

do {
    let audioPlayer = try AVAudioPlayer(contentsOf: audioURL)
} catch {
    print("Failed to load audio file: \(error.localizedDescription)")
}

class ViewController: UIViewController, AVAudioPlayerDelegate {
    // ...

    func setupAudioPlayer() {
        // ...

        audioPlayer.delegate = self
        audioPlayer.prepareToPlay()
        audioPlayer.play()
    }

    func audioPlayerUpdateProgress(_ audioPlayer: AVAudioPlayer) {
        let progress = audioPlayer.currentTime / audioPlayer.duration
        updateProgressBar(progress)
    }

    func updateProgressBar(_ progress: Double) {
        // 更新进度条的代码
    }

    // ...
}

class ViewController: UIViewController, AVAudioPlayerDelegate {
    // ...

    var progressTimer: Timer?

    func setupAudioPlayer() {
        // ...

        audioPlayer.delegate = self
        audioPlayer.prepareToPlay()
        audioPlayer.play()

        progressTimer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(updateProgress), userInfo: nil, repeats: true)
    }

    @objc func updateProgress() {
        audioPlayerUpdateProgress(audioPlayer)
    }

    // ...
}

class ViewController: UIViewController, AVAudioPlayerDelegate {
    // ...

    override func viewDidLoad() {
        super.viewDidLoad()

        setupAudioPlayer()
    }

    // ...
}