/// <summary>
/// 异步加载资源
/// </summary>
public void LoadResourceAsync(string assetPath, OnLoadResAsyncDone asynCallback)
{
Object assetObj = LoadAssetFromCache(assetPath);
if (null == assetObj)
{
if (m_callbackLoadingDict.ContainsKey(assetPath))
{
//资源为空，说明资源等待加载或在正在加载( 该资源在等待队列或加载队列中)
m_callbackLoadingDict[assetPath] += asynCallback;
}
else
{
m_callbackLoadingDict.Add(assetPath, asynCallback);
//理论上 该资源不会包含在等待队列、加载队列中
if (!m_assetWaitLoadQueue.Contains(assetPath) && !m_assetLoadingList.Contains(assetPath))
{
m_assetWaitLoadQueue.Add(assetPath);
}
}
}
else
{
if (null != asynCallback)
{
asynCallback(assetPath, assetObj);
}
}
}
/// <summary>
/// 异步加载资源
/// </summary>
private IEnumerator LoadResourceAsync(string assetPath)
{
ResourceRequest request = Resources.LoadAsync(assetPath);
while (!request.isDone)
{
yield return(null);
}
if (m_callbackLoadingDict.ContainsKey(assetPath))
{
Object assetObj = request.asset;
if (null != assetObj)
{
m_assetLoadedDict[assetPath] = new AssetLoader(assetObj);
}
else
{
LoggerHelper.Error(string.Format("LoadResAsync Fail: {0} not exist.", assetPath));
}
OnLoadResAsyncDone asyncCallback = m_callbackLoadingDict[assetPath];
m_callbackLoadingDict.Remove(assetPath);
m_assetLoadingList.Remove(assetPath);
if (null != asyncCallback)
{
asyncCallback(assetPath, assetObj);
}
}
else
{
LoggerHelper.Error(string.Format("LoadResAsync Callback Error: key {0} not exist.", assetPath));
throw new MissingReferenceException(string.Format("LoadResAsync Callback Error: key {0} not exist.", assetPath));
}
}
