We have the below code. On Android, the code reports a smooth progress from
0 to 1. On iOS, it jumps straight from 0 to 1. This is also exhibited in
the foreground as when we load the asset bundle for the first time the
whole app freezes until the bundle successfully loads.
A couple of things to consider:
- The problem is iOS specific. it
works on every other platform.
-we do not ship for
webplayer - It successfully loads the assets on iOS - so definitely built
for the platform - We download assets
over the internet in this particular
situation, so we are not loading from
streaming assets - When we download, we save to a location on disk. Only after the content is 100% downloaded do we then load the bundle.
- Said another way: WWW.LoadFromCacheOrDownload is given a local path to load the bundle from
- Line 10 is yield
every frame NOT every cpu cycle. So
it is not maxing out the CPU. - To reiterate: The below code loads the bundle correctly - it just does not report on progress in a granular way AND the app freezes while loading the bundle
What we would prefer to see is a loading process that is smoother - allowing us to at least show a graduated progress bar or whirly gig.
Why is this? Is there anything we can to do mitigate?
var threadPriority = priority == AssetPriority.Foreground ? ThreadPriority.High : ThreadPriority.Low;
Application.backgroundLoadingPriority = threadPriority;
using (var www = WWW.LoadFromCacheOrDownload(url, 1)) {
Trace.Log(string.Format("{0} {1} Priority: {2}", LocalPackagePath, ContainerPath, priority));
www.threadPriority = threadPriority;
Application.backgroundLoadingPriority = www.threadPriority;
Trace.LogDiag(string.Format("{0} STARTING LoadFromCacheOrDownload", LocalPackagePath));
Script.StartCoroutine(RunWWW(www));
do
{
yield return 0;
Trace.LogDiag("Progress: " + www.progress);
} while (!www.isDone && String.IsNullOrEmpty(www.error));
Trace.LogDiag(string.Format("{0} END LoadFromCacheOrDownload", LocalPackagePath));
if (!String.IsNullOrEmpty(www.error) || www.assetBundle == null) {
// we received an error loading the bundle
// as the bundle is local, chances are the bundle is corrupted by something.
// We delete and move on...
Trace.LogError(string.Format("{0} Error loading bundle @ {1}: {2}", LocalPackagePath, ContainerPath, (String.IsNullOrEmpty(www.error) ? "Unknown" : www.error)));
yield break;
}
Bundle = www.assetBundle;
Bundle.name = ContainerPath;
}
… and:
private IEnumerator RunWWW(WWW www)
{
yield return www;
}