在uxml中带有滑块的Unity混音器,尽管使用了PlayerPrefs,但在场景重新加载后音量值不会持久

在Unity中,我使用混音器来管理音量,包括音乐和SFX。我已经通过UXML实现了UI滑块,并使用PlayerPrefs在会话之间保存和加载音量值。随着时间的推移,我遇到了一个问题:虽然滑块值被正确导入和显示,但重新加载场景后音量不会持续。例如,如果我将音乐音量设置为50%并重新启动场景,音量将恢复到默认值。我已经通过PlayerPrefs验证了这些值是否正确保存,但似乎混音器在重新加载场景后没有应用这些值。我尝试了几种解决方案,但到目前为止还没有成功。我该如何解决这个问题?

using UnityEngine;
using UnityEngine.Audio;
using UnityEngine.UIElements;

public class VolumeController : MonoBehaviour
{
    public string sliderTemplateName = "MySlider";
    public AudioMixer musicMixer;
    public AudioMixer sfxMixer;

    private const string musicPrefsKey = "MusicVolume";
    private const string sfxPrefsKey = "SFXVolume";

    private const float minVolumeDB = -80f;
    private const float maxVolumeDB = 0f;

    private Slider musicSlider;
    private Slider sfxSlider;

    private void Awake()
    {
        Debug.Log("Awake called");
        LoadVolumeSettings();
    }

    private void OnEnable()
    {
        Debug.Log("OnEnable called");

        var uiDocument = GetComponent<UIDocument>();
        if (uiDocument != null)
        {
            var root = uiDocument.rootVisualElement;
            var sliders = root.Query<Slider>(sliderTemplateName).ToList();

            if (sliders.Count >= 2)
            {
                musicSlider = sliders[0];
                sfxSlider = sliders[1];

                musicSlider.RegisterValueChangedCallback(evt => OnMusicVolumeSliderChanged(evt.newValue));
                sfxSlider.RegisterValueChangedCallback(evt => OnSFXVolumeSliderChanged(evt.newValue));

                // Initializing sliders with PlayerPrefs values
                float savedMusicVolume = PlayerPrefs.GetFloat(musicPrefsKey, 0.5f);
                float savedSfxVolume = PlayerPrefs.GetFloat(sfxPrefsKey, 0.5f);

                musicSlider.SetValueWithoutNotify(savedMusicVolume);
                ApplyMusicVolume(savedMusicVolume);

                sfxSlider.SetValueWithoutNotify(savedSfxVolume);
                ApplySFXVolume(savedSfxVolume);

                Debug.Log($"OnEnable: Loaded music volume: {savedMusicVolume}, SFX volume: {savedSfxVolume}");
            }
            else
            {
                Debug.LogError("Insufficient sliders found in UXML.");
            }
        }
        else
        {
            Debug.LogError("UIDocument not found on the GameObject.");
        }
    }

    private void OnDisable()
    {
        Debug.Log("OnDisable called");
        if (musicSlider != null)
        {
            musicSlider.UnregisterValueChangedCallback(evt => OnMusicVolumeSliderChanged(evt.newValue));
        }
        if (sfxSlider != null)
        {
            sfxSlider.UnregisterValueChangedCallback(evt => OnSFXVolumeSliderChanged(evt.newValue));
        }
    }

    private void LoadVolumeSettings()
    {
        Debug.Log("LoadVolumeSettings called");

        float musicVolume = PlayerPrefs.GetFloat(musicPrefsKey, 0.5f);
        float sfxVolume = PlayerPrefs.GetFloat(sfxPrefsKey, 0.5f);

        ApplyMusicVolume(musicVolume);
        ApplySFXVolume(sfxVolume);

        Debug.Log($"LoadVolumeSettings: Loaded music volume: {musicVolume}, SFX volume: {sfxVolume}");
    }

    private void OnMusicVolumeSliderChanged(float volume)
    {
        Debug.Log($"OnMusicVolumeSliderChanged: Volume changed to {volume}");
        SetMusicVolume(volume);
    }

    private void OnSFXVolumeSliderChanged(float volume)
    {
        Debug.Log($"OnSFXVolumeSliderChanged: Volume changed to {volume}");
        SetSFXVolume(volume);
    }

    private void SetMusicVolume(float volume)
    {
        PlayerPrefs.SetFloat(musicPrefsKey, volume);
        PlayerPrefs.Save();
        ApplyMusicVolume(volume);

        Debug.Log($"SetMusicVolume: Music volume saved and applied: {volume}");
    }

    private void SetSFXVolume(float volume)
    {
        PlayerPrefs.SetFloat(sfxPrefsKey, volume);
        PlayerPrefs.Save();
        ApplySFXVolume(volume);

        Debug.Log($"SetSFXVolume: SFX volume saved and applied: {volume}");
    }

    private void ApplyMusicVolume(float volume)
    {
        float musicVolumeDB = Mathf.Lerp(minVolumeDB, maxVolumeDB, volume);
        musicMixer.SetFloat("MusicVolume", musicVolumeDB);
        Debug.Log($"ApplyMusicVolume: Applied music volume: {volume} ({musicVolumeDB} dB)");
    }

    private void ApplySFXVolume(float volume)
    {
        float sfxVolumeDB = Mathf.Lerp(minVolumeDB, maxVolumeDB, volume);
        sfxMixer.SetFloat("SFXVolume", sfxVolumeDB);
        Debug.Log($"ApplySFXVolume: Applied SFX volume: {volume} ({sfxVolumeDB} dB)");
    }

    [ContextMenu("Reset PlayerPrefs")]
    private void ResetPlayerPrefs()
    {
        PlayerPrefs.DeleteKey(musicPrefsKey);
        PlayerPrefs.DeleteKey(sfxPrefsKey);
        PlayerPrefs.Save();
        Debug.Log("ResetPlayerPrefs: PlayerPrefs for music and SFX volumes have been reset.");
    }
}

我尝试使用PlayerPrefs在会话之间保存和加载音量值。我预计在重新加载场景后,音量将保持设置为通过PlayerPrefs保存的值。