Resource Manager

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ResourceManager
{
    public T Load<T>(string path) where T: Object
    {
        return Resources.Load<T>(path);
    }

    public GameObject Instantiate(string path, Transform parent = null)
    {
        GameObject prefab = Load<GameObject>($"Prefabs/{path}");
        if (prefab == null)
        {
            Debug.Log($"Failed to load prefab : {path}");
            return null;
        }

        return Object.Instantiate(prefab, parent);
    }

    public void Destroy(GameObject go)
    {
        if (go == null)
            return;

        Object.Destroy(go);
    }
}

기존 Object 객체에서 사용되는 함수들을 Monobehaviour 없이 구현하기 위해(Managers 스크립트에서 new를 통해 인스턴스화 하기 위해) 새로 구현을 한다.

Managers

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Managers : MonoBehaviour
{
    static Managers s_Instance;
    static Managers Instance { get { Init(); return s_Instance; } }

    InputManager _input = new InputManager();
    ResourceManager _resource = new ResourceManager();
    public static InputManager Input { get { return Instance._input; } }
    public static ResourceManager Resource { get { return Instance._resource;} }

    // Start is called before the first frame update
    void Start()
    {
        Init();
    }

    // Update is called once per frame
    void Update()
    {
        _input.OnUpdate();
    }

    static void Init()
    {
        if (s_Instance == null)
        {
            GameObject go = GameObject.Find("@Managers");
            if (go == null)
            {
                go = new GameObject { name = "@Managers" };
                go.AddComponent<Managers>();
            }
            DontDestroyOnLoad(go);
            s_Instance = go.GetComponent<Managers>();
        }
    }
}

기존 Managers에서 ResourceManager의 인스턴스화를 추가했다.