The most common form of a navigation markers group is a chapter list; however, you can also provide other sets of markers to allow a user to jump to significant events in the presentation. For example, a “Goals Scored” markers group might summarize key moments in a recorded sporting event. When you associate navigation markers with an AVPlayerItem object you present with an AVPlayerViewController, the user interface provides options for navigating each group.
This sample code project demonstrates techniques for tracking AVPlayerViewController presentation state across multiple application scenarios, including being displayed fullscreen, embedded inline, or as Picture in Picture.