SpriteAtlasのリクエスト

Rebind.cs

using System;
using UnityEngine;
using UnityEngine.U2D;

public class Rebind : MonoBehaviour
{
    Action<SpriteAtlas> atlasAction;
    AssetBundle assetbundle;
    const string assetBundleName = "atlas";

    private void Awake()
    {
        assetbundle = AssetBundle.LoadFromFile(Application.streamingAssetsPath + "/" + assetBundleName);
    }

    private void OnDestroy()
    {
        assetbundle.Unload(true);
    }

    private void OnEnable()
    {
        SpriteAtlasManager.atlasRequested += AtlasRequested;
    }

    private void OnDisable()
    {
        SpriteAtlasManager.atlasRequested -= AtlasRequested;
    }

    void AtlasRequested(string tag, Action<SpriteAtlas> atlasAction)
    {
        var request = assetbundle.LoadAssetAsync<SpriteAtlas>(tag);
        request.completed += (op) =>
        {
            atlasAction.Invoke((SpriteAtlas)request.asset);
        };
    }
}