Paul Hegarty introduces Core Motion – detecting the position and movement of the device – and then does a demo with Gravity-Driven Playing Card. He then covers taking pictures within your app.

Paul Hegarty talks about modal, popover, unwind, and embed segues.

Paul Hegarty covers alerts and action sheets, notifications and KVO, and the application lifecycle.

Paul Hegarty extends his coverage of Documents. He then does a demonstration of using Codable to create a JSON representation, storing it in the filesystem then letting UIDocument store it instead, and then using UIDocumentBrowserViewController to choose/create/rename/move documents.