Changes in the iBooks Asset Guide 5.2.4

Fixed-Layout Books: Orientation Locking

Due to the iOS split screen feature, you can no longer specify that a book’s orientation be locked. Any text and examples that included the orientation locking, and the following properties have been removed from this guide:

Fixed-Layout Books: Binding

Previously, in a fixed-layout book with two documents per spread, iBooks maintained a book-like appearance by including the book spine, pages, and page curl. The ibooks:binding property could be used to override the book-like appearance. iBooks no longer supports the book-like appearance for fixed-layout books. Any text and examples that included the binding property have been removed from this guide.

Gaiji Images

To ensure that the images you use for Gaiji characters appear optimally across all themes, such as Sepia or Night, make sure the images have transparent backgrounds. Otherwise, the backgrounds could be visible in certain themes.

Embedded Audio

The standard video pane dimensions are a 1:2 ratio and display at 300px wide by 150px tall on the iPad. However, the width can also be defined using CSS, ideally as a percentage of the screen width. iBooks will ensure that video and audio fit on a page, no matter the screen size. To avoid layout issues, do not set an explicit height on video elements.

Correction

The manifest example for SMIL documents included an incorrect media-type. The media-type has been changed from audio/mpeg to audio/m4a as follows:

Deprecated