【Unity】ServiceLocatorを使ってサービスクラスをまとめる

using System;
using System.Collections.Generic;

namespace Services
{
    /// <summary>
    /// サービスロケータ
    /// </summary>
    public static class ServiceLocator
    {
        /// <summary>
        /// コンテナ
        /// </summary>
        private static readonly Dictionary<Type, object> Container;

        /// <summary>
        /// コンストラクタ
        /// </summary>
        static ServiceLocator()
        {
            Container = new Dictionary<Type, object>();
        }

        /// <summary>
        /// サービス取得
        /// </summary>
        public static T Resolve<T>()
        {
            return (T) Container[typeof(T)];
        }

        /// <summary>
        /// サービス登録
        /// </summary>
        public static void Register<T>(T instance)
        {
            Container[typeof(T)] = instance;
        }

        /// <summary>
        /// サービス登録解除
        /// </summary>
        public static void UnRegister<T>()
        {
            Container.Remove(typeof(T));
        }
    }
}

using UnityEngine;

namespace Services
{
    /// <summary>
    /// PlayerPrefsService
    /// </summary>
    public class PlayerPrefsService : IPlayerPrefsService
    {
        public void SetInt(string key, int value)
        {
            PlayerPrefs.SetInt(key, value);
        }

        public int GetInt(string key)
        {
            return PlayerPrefs.GetInt(key);
        }
    }
}

namespace Services
{
    /// <summary>
    /// PlayerPrefsService
    /// </summary>
    public interface IPlayerPrefsService
    {
        public void SetInt(string key, int value);
        public int GetInt(string key);
    }
}

using Services;
using UnityEngine;

/// <summary>
/// プロジェクト初期化クラス
/// </summary>
public static class ProjectInitializer
{
    /// <summary>
    /// 初期化処理(シーンのロード前に呼ばれる)
    /// </summary>
    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
    private static void Initialize()
    {
        // サービス登録
        ServiceLocator.Register<IPlayerPrefsService>(new PlayerPrefsService());
    }
}

using Services;
using UnityEngine;
using Utils;

namespace Scenes.Common
{
    /// <summary>
    /// PlayerPrefs管理クラス
    /// </summary>
    public static class SamplePlayerPrefs
    {
        /// <summary>
        /// スコア
        /// </summary>
        public static int Score
        {
            get => GetPlayerPrefsIntValue(KeyScore);
            set => SetPlayerPrefsIntValue(KeyScore, value);
        }
        private const string KeyScore = "Score";
        
        private static void SetPlayerPrefsIntValue(string key, int value)
        {
            ServiceLocator.Resolve<IPlayerPrefsService>().SetInt(key, value);
        }

        private static int GetPlayerPrefsIntValue(string key)
        {
            return ServiceLocator.Resolve<IPlayerPrefsService>().GetInt(key);
        }
    }
}

using Services;
using UnityEngine;

/// <summary>
/// プロジェクト初期化クラス
/// </summary>
public static class ProjectInitializer
{
    /// <summary>
    /// 初期化処理
    /// シーンのロード前に呼ばれる
    /// </summary>
    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
    private static void Initialize()
    {
        // サービス登録
        var serviceLocator = new GameObject("ServiceLocator");
        ServiceLocator.Register<IXXXService>(serviceLocator.AddComponent<XXXService>());
    }
}