Settings Script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Audio;
using UnityEngine.UI;

public class SettingManager : MonoBehaviour
{
    public Toggle fullScreenToggle;
    public Dropdown resolutionDropdown;
    public Dropdown textureQualityDropdown;
    public Dropdown antialiasingDropdown;
    public Dropdown vSyncDropdown;
    public Slider masterVolumeSlider;
    public Slider musicVolumeSlider;
    public Slider sfxVolumeSlider;
    public Button applyButton;

    public Resolution[] resolutions;
    float master, music, sfx;

    public AudioMixer audioMixer;

    void OnEnable()
    {
        LoadSettings();

        fullScreenToggle.onValueChanged.AddListener(delegate { OnFullScreenToggle(); });
        resolutionDropdown.onValueChanged.AddListener(delegate { OnResolutionChange(); });
        textureQualityDropdown.onValueChanged.AddListener(delegate { OnTextureQualityChange(); });
        antialiasingDropdown.onValueChanged.AddListener(delegate { OnAntialiasingChange(); });
        vSyncDropdown.onValueChanged.AddListener(delegate { OnVSyncChange(); });
        applyButton.onClick.AddListener(delegate { OnApplyButtonClick(); });

        resolutions = Screen.resolutions;
        foreach (Resolution resolution in resolutions)
        {
            resolutionDropdown.options.Add(new Dropdown.OptionData(resolution.ToString()));
        }
    }

    public void OnFullScreenToggle()
    {
        Screen.fullScreen = fullScreenToggle.isOn;
    }

    public void OnResolutionChange()
    {
        Screen.SetResolution(resolutions[resolutionDropdown.value].width, resolutions[resolutionDropdown.value].height, Screen.fullScreen);
    }

    public void OnTextureQualityChange()
    {
        QualitySettings.masterTextureLimit = textureQualityDropdown.value;
    }

    public void OnAntialiasingChange()
    {
        QualitySettings.antiAliasing = (int)Mathf.Pow(2f, antialiasingDropdown.value);
    }

    public void OnVSyncChange()
    {
        QualitySettings.vSyncCount = vSyncDropdown.value;
    }

    public void SetMasterVolume(float masterVol)
    {
        audioMixer.SetFloat("masterVol", masterVol);
    }

    public void SetMusicVolume(float musicVol)
    {
        audioMixer.SetFloat("musicVol", musicVol);
    }

    public void SetSfxVolume(float sfxVol)
    {
        audioMixer.SetFloat("sfxVol", sfxVol);
    }

    public void OnApplyButtonClick()
    {
        SaveSettings();
    }

    public void SaveSettings()
    {
        PlayerPrefs.SetInt("fullscreen", Screen.fullScreen ? 1 : 0);
        PlayerPrefs.SetInt("resolutionDropdownValue", resolutionDropdown.value);
        PlayerPrefs.SetInt("width", resolutions[resolutionDropdown.value].width);
        PlayerPrefs.SetInt("height", resolutions[resolutionDropdown.value].height);
        PlayerPrefs.SetInt("textureQuality", QualitySettings.masterTextureLimit);
        PlayerPrefs.SetInt("antialiasingDropdownValue", antialiasingDropdown.value);
        PlayerPrefs.SetInt("antiAliasing", QualitySettings.antiAliasing);
        PlayerPrefs.SetInt("vSync", QualitySettings.vSyncCount);
        audioMixer.GetFloat("masterVol", out master);
        PlayerPrefs.SetFloat("masterVolume", master);
        audioMixer.GetFloat("musicVol", out music);
        PlayerPrefs.SetFloat("musicVolume", music);
        audioMixer.GetFloat("sfxVol", out sfx);
        PlayerPrefs.SetFloat("sfxVolume", sfx);
        PlayerPrefs.Save();
    }

    public void LoadSettings()
    {
        Screen.fullScreen = PlayerPrefs.GetInt("fullscreen") == 1 ? true : false;
        //Screen.SetResolution(PlayerPrefs.GetInt("width"), PlayerPrefs.GetInt("height"), Screen.fullScreen);
        QualitySettings.masterTextureLimit = PlayerPrefs.GetInt("textureQuality");
        QualitySettings.antiAliasing = PlayerPrefs.GetInt("antiAliasing");
        QualitySettings.vSyncCount = PlayerPrefs.GetInt("vSync");
        audioMixer.SetFloat("masterVol", PlayerPrefs.GetFloat("masterVolume"));
        audioMixer.SetFloat("musicVol", PlayerPrefs.GetFloat("musicVolume"));
        audioMixer.SetFloat("sfxVol", PlayerPrefs.GetFloat("sfxVolume"));

        fullScreenToggle.isOn = Screen.fullScreen;
        //resolutionDropdown.value = PlayerPrefs.GetInt("resolutionDropdownValue");
        textureQualityDropdown.value = QualitySettings.masterTextureLimit;
        antialiasingDropdown.value = PlayerPrefs.GetInt("antialiasingDropdownValue");
        vSyncDropdown.value = QualitySettings.vSyncCount;
        masterVolumeSlider.value = PlayerPrefs.GetFloat("masterVolume");
        musicVolumeSlider.value = PlayerPrefs.GetFloat("masterVolume");
        sfxVolumeSlider.value = PlayerPrefs.GetFloat("sfxVolume");
    }
}