ModelProject/Assets/Scripts/BundleAssetRequest.cs

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

public class BundleAssetRequest : AssetRequest
{
    protected readonly string assetBundleName;
    protected BundleRequest BundleRequest;
    protected List<BundleRequest> children = new List<BundleRequest>();

    public BundleAssetRequest(string bundle)
    {
        assetBundleName = bundle;
    }

    internal override void Load()
    {
        BundleRequest = LoadModule.LoadBundle(assetBundleName);
        var names = LoadModule.GetAllDependencies(assetBundleName);
        foreach (var item in names)
            children.Add(LoadModule.LoadBundle(item));
        var assetName = Path.GetFileName(name);
        var ab = BundleRequest.assetBundle;
        if (ab != null)
            asset = ab.LoadAsset(assetName, assetType);
        if (asset == null)
            error = "asset == null";
        LoadState = AssetLoadState.Loaded;
    }

    internal override void Unload()
    {
        if (BundleRequest != null)
        {
            BundleRequest.Release();
            BundleRequest = null;
        }

        if (children.Count > 0)
        {
            foreach (var item in children)
                item.Release();
            children.Clear();
        }

        asset = null;
    }
}