duo-app-intentsApp Intents on iPhone Duo: AppIntent, AppEntity with EntityStringQuery, OpenIntent with TargetContentProvidingIntent and onAppIntentExecution (UISceneAppIntent and AppIntentSceneDelegate in UIKit) to show the right item in the right pane or window, handlesExternalEvents to pick the window, intents t
duo-cameraCamera capture on iPhone Duo, Apple's foldable. Use when an app takes photos or video, runs a video call or shows a camera preview, and must work closed (outer display), open (inner display), partly folded (book, tabletop), open and turned around (flipped) and through fold and unfold. Covers the vir
duo-gamesBuilds games for iPhone Duo, Apple's foldable. The game fills the closed outer display, the open inner display, book pose and tabletop by changing its aspect ratio instead of letterboxing, as Apple's HIG asks; touch controls stay off the fold; and in tabletop the world sits above the fold with the c
duo-intelligenceAdds Foundation Models to an iPhone Duo app: the on-device model (SystemLanguageModel) and the Private Cloud Compute server model (PrivateCloudComputeLanguageModel) behind one LanguageModelSession API, an AI side pane beside the content when the phone is open or in book pose (split ArrangementView)
duo-mediaVideo and audio playback on iPhone Duo, Apple's foldable. Use when an app plays video or audio and must keep playing through fold, unfold and rotation, when you build a tabletop player (video above the fold, the same controls below) or a book-pose player, an up next queue, Picture in Picture, Now Pl
duo-readingBuilds reading and document screens for iPhone Duo, Apple's foldable: one page on the closed outer display, two facing pages split at the fold when the phone is open and held wide or folded like a book, and in tabletop the page above the fold with page turns below it. Use when you build an e-reader,
duo-swiftui-27The iOS 27 SwiftUI changes that matter on iPhone Duo, Apple's foldable, where every fold, unfold and rotation resizes the app. Use it when building with Xcode 27.1 breaks a view (@State macro, ContentBuilder, TN3211), when a grid or list that reflows between the outer and inner display needs drag to
duo-system-surfacesWidgets, Live Activities, StandBy and Controls for apps on iPhone Duo, Apple's foldable. Use it when you build or check a widget extension, a Live Activity, a Dynamic Island presentation, a StandBy layout or a Control Center or Lock Screen control, and the app runs on iPhone Duo. Covers the redesign