epub3 document does not load iframe on ipad's ibooks

Question

I have created an epub3 book which contains an iframe to load content from an external server. It works fine in the ebook readers I tried, but doesn't seem to work in iBooks on an iPad.

Is this an Apple special or do I need to set some additional parameters inside the ebook?

The settings on the iPad for iBooks does allow for 'Online Content'.

I did manage to display the external content in an ebook I created with Apple's iBook Author but I would like to use a different authoring tool (pandoc) for various reasons.

Any suggestions?

Answer 1

You can't use an iframe in the epub itself in iBooks, you have to use an HTML widget and embed the iframe inside that.

Answer 2

As of now, iBooks does not allow any sort of external communication from books in their store. You can do some basic XHR and URL mapping with images/audio/video but they don't support external content when you actually upload to the iBookstore. It is quite sad...