sked/Assets/Script/Common/UI/SpriteManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.U2D;

public class SpriteManager : Singleton<SpriteManager>
{
    public AssetBundleManager assetBundle = new AssetBundleManager();
    public AssetBundleManager assetBundleTexture = new AssetBundleManager();

#if false
    public Sprite SpriteGet(string atlas, string sprite)
    {
        SpriteAtlas spriteAtlas = assetBundle.GetSpriteAtlas(atlas);

        //Debug.LogWarning($"{atlas}, {sprite}");

        if (spriteAtlas != null)
            return spriteAtlas.GetSprite(sprite);

        return null;
    }
    public Sprite TextureGet(string sprite)
    {
        return assetBundleTexture.GetTexture(sprite);
    }
#else
    Dictionary<string, SpriteAtlas> dicAtlas = new Dictionary<string, SpriteAtlas>();
    public Sprite SpriteGet(string nameAtlas, string nameSprite)
    {
        if (nameSprite == string.Empty)
            return null;

        if (dicAtlas.ContainsKey(nameAtlas))
        {
            return dicAtlas[nameAtlas].GetSprite(nameSprite);
        }
        else
        {
            SpriteAtlas spriteAtlas = Resources.Load($"Atlas/{nameAtlas}") as SpriteAtlas;
            if (spriteAtlas != null)
            {
                dicAtlas.Add(nameAtlas, spriteAtlas);
                return spriteAtlas.GetSprite(nameSprite);
            }
        }

        return null;
    }
    Dictionary<string, Sprite> dicTexture = new Dictionary<string, Sprite>();
    public Sprite SpriteGet(string nameSprite)
    {
        if (nameSprite == string.Empty)
            return null;

        if (dicTexture.ContainsKey(nameSprite))
        {
            return dicTexture[nameSprite];
        }
        else
        {
            Sprite texture = Resources.Load<Sprite>($"Texture/{nameSprite}");
            if (texture != null)
            {
                dicTexture.Add(nameSprite, texture);
                return texture;
            }
        }

        return null;
    }
#endif
}