/// <summary>
/// 保存异步加载获取的AssetBundle
/// </summary>
/// <param name="name">AssetBundle名称</param>
/// <returns></returns>
public void SaveAssetBundle(AssetBundle assetBundle)
{
AssetBundleItem abItem = null;
uint crc = Crc32.GetCrc32(assetBundle.name); //根据名称获取Crc值
if (m_AssetBundleItemDic.TryGetValue(crc, out abItem) && abItem != null)
{
abItem.assetBundle = assetBundle;
}
else
{
Debug.LogError("异步加载资源后，保存资源到字典时没有找到对应Key：" + assetBundle.name);
}
}
/// <summary>
/// 加载单个AssetBundle,根据名称
/// </summary>
/// <param name="name">AssetBundle名称</param>
/// <returns></returns>
public AssetBundle LoadAssetBundle(string name)
{
AssetBundleItem abItem = null;
uint crc = Crc32.GetCrc32(name); //根据名称获取Crc值
if (!m_AssetBundleItemDic.TryGetValue(crc, out abItem))
{
AssetBundle assetBundle = null;
//热更下来的AB包放在Application.persistentDataPath + "/DownLoad" 目录下
//打包到游戏包里的AB包放在Application.streamingAssetsPath 目录下
//所以要根据资源文件名称来判断是否是热更的AB包
string hotAbPath = HotPatchManager.Instance.ComputeABPath(name);
string fullPath = string.IsNullOrEmpty(hotAbPath) ? ABLoadPath + name : hotAbPath;
//加密后的ab包要先解密，才能加载
if (Encrypt)
{
byte[] bytes = AES.AESFileByteDecrypt(fullPath, FrameConstr.m_ABSecretKey);
assetBundle = AssetBundle.LoadFromMemory(bytes);
}
else
{
assetBundle = AssetBundle.LoadFromFile(fullPath);
}
if (assetBundle == null)
{
Debug.LogError("Load AssetBundle Error:" + fullPath);
}
abItem = m_AssetBundleItemPool.Spawn(true);
abItem.assetBundle = assetBundle;
abItem.RefCount++;
m_AssetBundleItemDic.Add(crc, abItem);
}
else
{
abItem.RefCount++;
}
return(abItem.assetBundle);
}
/// <summary>
/// 卸载AssetBundle
/// </summary>
/// <param name="name"></param>
private void UnloadAssetBundle(string name)
{
AssetBundleItem abItem = null;
uint crc = Crc32.GetCrc32(name); //根据名称获取Crc值
if (m_AssetBundleItemDic.TryGetValue(crc, out abItem) && abItem != null)
{
abItem.RefCount--;
if (abItem.RefCount <= 0 && abItem.assetBundle != null)
{
abItem.assetBundle.Unload(true); //卸载掉AssetBundle
abItem.Rest(); //重置这个对象
m_AssetBundleItemPool.Recycle(abItem); //回收到对象池子里
m_AssetBundleItemDic.Remove(crc); //从字典中删除这个资源
}
}
}
/// <summary>
/// 收集异步请求
/// </summary>
/// <returns></returns>
private bool GetAssetBundleRequest(string name, out AssetBundleCreateRequest abRequest, out AssetBundle ab)
{
abRequest = null;
ab = null;
AssetBundleItem abItem = null;
uint crc = Crc32.GetCrc32(name); //根据名称获取Crc值
//没有加载过这个AB包，创建异步加载请求
if (!m_AssetBundleItemDic.TryGetValue(crc, out abItem))
{
//热更下来的AB包放在Application.persistentDataPath + "/DownLoad" 目录下
//打包到游戏包里的AB包放在Application.streamingAssetsPath 目录下
//所以要根据资源文件名称来判断是否是热更的AB包
string hotAbPath = HotPatchManager.Instance.ComputeABPath(name);
string fullPath = string.IsNullOrEmpty(hotAbPath) ? ABLoadPath + name : hotAbPath;
//加密后的ab包要先解密，才能加载，但是异步的时候感觉就没有异步的效果了额
if (Encrypt)
{
byte[] bytes = AES.AESFileByteDecrypt(fullPath, FrameConstr.m_ABSecretKey);
abRequest = AssetBundle.LoadFromMemoryAsync(bytes);
}
else
{
abRequest = AssetBundle.LoadFromFileAsync(fullPath);
}
abItem = m_AssetBundleItemPool.Spawn(true);
abItem.RefCount++;
m_AssetBundleItemDic.Add(crc, abItem);
return(false);
}
else
{
ab = abItem.assetBundle;
abItem.RefCount++;
return(true);
}
}