Issue with iPad caching content between viewings

I've come across an unusual issue with HTML5 content on iPad. Here's the situation:

  1. HTML5 content uploaded to SharePoint for viewing
  2. Content is accessed on iPad via a link emailed to user - the content plays fine.
  3. Storyline file is now updated and new published content is loaded to the same URL in SharePoint replacing the old content
  4. Same user now launches the training using the same URL but it still plays the old content, not the updated material. Even the image on the Lauch page shows the first slide of the old content.

Is the content somehow being cached on the iPad from the first viewing? I have cleared the cache/cookies and deleted history in Safari but it still loads the old content — content that doesn't even exist on the SharePoint server any longer.

Has anyone else seen this or have a solution?

3 Replies
Christine Hendrickson

Hi Brett,

Probably a silly question, but have you tried uploading the course under a new destination on the server, so it has a different URL? I'm just curious if overwriting it on SharePoint caused some sort of caching issue with it.

Also, another curiosity, do you have any issues with the old content displaying if you view the course on a PC?

Thanks!

Brett Rockwood

Hi Christine. I can upload the course to a different URL and it plays fine.

After some experimenting I've discovered the following: If I delete the course from SharePoint instead of overwriting it and then clear the cache/cookie of Safari it will play the correct content. If I overwrite the course and clear the cache it plays the old content. If I delete the old content, upload new content but don't delete the cache it seems to play the old content (but I need to test this further). Very strange.

When viewed on a PC it always behaves as expected whether I overwrite the old material or delete and reload it. I can open the same URL on the PC and iPad at the same time and have them play back different content. I suspect that there is something going on with SharePoint and it not actually deleting content that is being overwritten. I'll be doing a bit more experimenting and let you know what I come up with.

Christine Hendrickson

Hi Brett,

I agree, that's pretty strange - however, I'm glad to hear that you've at least had luck with viewing the updated version. I also agree that it may be an issue with SharePoint - or it could be an issue with mobile Safari and cache. 

If you discover anything else, please share :)

Have a great day, Brett!