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?
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.