//4.真正的加载ab或获取已加载的ab
private ABInfo LoadAbReal(string abPath, out bool isLoaded)
{
//已加载，直接返回
if (m_abLoaded.ContainsKey(abPath))
{
var abInfo = m_abLoaded[abPath];
if (!ABInfo.Empty(abInfo))
{
isLoaded = true;
abInfo.usedFrame = Time.frameCount;
return(abInfo);
}
}
isLoaded = false;
//未加载，走加载流程
//过滤无用路径和无效路径
if (string.IsNullOrEmpty(abPath))
{
return(null);
}
if (!m_abAll.Contains(abPath))
{
return(null);
}
var realPath = GetAbPath(abPath);
var ab = AssetBundle.LoadFromFile(abPath);
if (ab != null)
{
var abInfo = new ABInfo();
abInfo.ab = ab;
abInfo.abDeps = new AssetRefList();
abInfo.usedFrame = Time.frameCount;
m_abLoaded.Add(abPath, abInfo);
}
return(null);
}
