SliderやToggleの状態を簡易的に保存する拡張メソッド

SaveStateExtensions.cs

using UnityEngine;
using UnityEngine.UI;

public static class SaveStateExtensions
{
    public static void SaveState(this Toggle toggle, string key)
    {
        key = $"{new System.Diagnostics.StackFrame(1).GetMethod().ReflectedType}+{key}";
        Debug.Log(key);
        toggle.isOn = PlayerPrefs.GetInt(key, 0) == 1;
        toggle.onValueChanged.AddListener(isOn => PlayerPrefs.SetInt(key, isOn ? 1 : 0));
    }
    public static void SaveState(this Slider slider, string key)
    {
        key = $"{new System.Diagnostics.StackFrame(1).GetMethod().Name}+{key}";
        slider.value = PlayerPrefs.GetFloat(key, 0f);
        slider.onValueChanged.AddListener(value => PlayerPrefs.SetFloat(key, value));
    }
    public static void SaveState(this InputField inputField, string key)
    {
        key = $"{new System.Diagnostics.StackFrame(1).GetMethod().Name}+{key}";
        inputField.text = PlayerPrefs.GetString(key, string.Empty);
        inputField.onValueChanged.AddListener(value => PlayerPrefs.SetString(key, value));
    }
    public static void SaveState(this Dropdown dropdown, string key)
    {
        key = $"{new System.Diagnostics.StackFrame(1).GetMethod().Name}+{key}";
        dropdown.value = PlayerPrefs.GetInt(key, 0);
        dropdown.onValueChanged.AddListener(value => PlayerPrefs.SetInt(key, value));
    }
}

【Unity】既存のSliderやToggleの状態を簡易的に保存する拡張メソッド【SaveStateExtensions】 - Qiita
https://qiita.com/nkjzm/items/62f3bce82ed2d75833c0