/// <summary>
/// 内部加载bundle
/// </summary>
/// <param name="url">asset路径</param>
/// <param name="async">是否异步</param>
/// <returns>bundle对象</returns>
private ABundle LoadInternal(string url, bool async)
{
ABundle bundle = null;
if (m_BundleDic.TryGetValue(url, out bundle))
{
//从缓存中取并引用+1
bundle.AddReference();
return(bundle);
}
//创建ab
if (async)
{
bundle = new BundleAsync();
bundle.url = url;
m_AsyncList.Add(bundle as ABundleAsync);
}
else
{
bundle = new Bundle();
bundle.url = url;
}
m_BundleDic.Add(url, bundle);
bundle.AddReference();
bundle.Load();
return(bundle);
}
/// <summary>
/// 卸载bundle
/// </summary>
/// <param name="bundle">要卸载的bundle</param>
internal void UnLoad(ABundle bundle)
{
if (bundle == null)
{
throw new ArgumentException($"{nameof(BundleManager)}.{nameof(UnLoad)}() bundle is null.");
}
//引用-1
bundle.ReduceReference();
//引用为0,直接释放
if (bundle.reference == 0)
{
if (!bundle.done && bundle is BundleAsync)
{
BundleAsync bundleAsync = bundle as BundleAsync;
if (m_AsyncList.Contains(bundleAsync))
{
m_AsyncList.Remove(bundleAsync);
}
}
m_BundleDic.Remove(bundle.url);
bundle.UnLoad();
}
}
/// <summary>
/// 内部加载bundle
/// </summary>
/// <param name="url">asset路径</param>
/// <param name="async">是否异步</param>
/// <returns>bundle对象</returns>
private ABundle LoadInternal(string url, bool async)
{
ABundle bundle;
if (m_BundleDic.TryGetValue(url, out bundle))
{
if (bundle.reference == 0)
{
m_NeedUnloadList.Remove(bundle);
}
//从缓存中取并引用+1
bundle.AddReference();
return(bundle);
}
//创建ab
if (async)
{
bundle = new BundleAsync();
bundle.url = url;
m_AsyncList.Add(bundle as ABundleAsync);
}
else
{
bundle = new Bundle();
bundle.url = url;
}
m_BundleDic.Add(url, bundle);
//加载依赖
string[] dependencies = m_AssetBundleManifest.GetDirectDependencies(url);
if (dependencies.Length > 0)
{
bundle.dependencies = new ABundle[dependencies.Length];
for (int i = 0; i < dependencies.Length; i++)
{
string dependencyUrl = dependencies[i];
ABundle dependencyBundle = LoadInternal(dependencyUrl, async);
bundle.dependencies[i] = dependencyBundle;
}
}
bundle.AddReference();
bundle.Load();
return(bundle);
}
public void LateUpdate()
{
if (m_NeedUnloadList.Count == 0)
{
return;
}
while (m_NeedUnloadList.Count > 0)
{
ABundle bundle = m_NeedUnloadList.First.Value;
m_NeedUnloadList.RemoveFirst();
if (bundle == null)
{
continue;
}
m_BundleDic.Remove(bundle.url);
if (!bundle.done && bundle is BundleAsync)
{
BundleAsync bundleAsync = bundle as BundleAsync;
if (m_AsyncList.Contains(bundleAsync))
{
m_AsyncList.Remove(bundleAsync);
}
}
bundle.UnLoad();
//依赖引用-1
if (bundle.dependencies != null)
{
for (int i = 0; i < bundle.dependencies.Length; i++)
{
ABundle temp = bundle.dependencies[i];
UnLoad(temp);
}
}
}
}
