// 9 articles available
When iPhone Duo is open, its outer display faces the same way as the rear camera. CameraCaptureAccessory lets your app put content there while it records. Here's how to build a scrolling teleprompter with it in SwiftUI and UIKit.
iOS 27.1 lets you read iPhone Duo's hinge angle and fold status with onHingeChange in SwiftUI and UIHingeInteraction in UIKit. Here's how the APIs work, why they're for interactive effects rather than layout, and a fold-to-scrub example.
iPhone Duo reserves parts of its displays for the fold and the front cameras. Learn which regions exist, when system views handle them for you, and how to query ReservedRegion in SwiftUI and UIKit to move custom content out of the way.
Apple is running two Xcode betas at once. Xcode 27.1 beta has the iPhone Duo SDK and simulator, while Xcode 27.2 beta has the 27.2 SDKs and new tooling. Here's what's in each, the known issues to watch for, and how to keep both installed.
ArrangementView is a new iOS 27.1 container that lays out a primary and secondary view side by side or layered, and rearranges them around the iPhone Duo fold. Here's how the split and overlay styles work, how to size them, and when not to use one.
On iPhone Duo, toolbars and tab bars move to the side of the screen. Learn when that happens, how to make sure the right items survive, and how to use axisBehavior, visibility priority, and compression behavior in SwiftUI.
iPhone Duo ships on October 23 with a folding inner display, a compact outer display, and toolbars that move to the side. Here's what to check in your app first, and where the new iOS 27.1 APIs fit in.
On iPhone Duo, which way a camera points depends on which display your app is on. Here's how the virtual front camera keeps existing apps working, and how AVCaptureDeviceDirectionCoordinator tells you which cameras face the person using your app.
UIScreen.main assumes your app lives on one screen with one size. iPhone Duo, iPhone Mirroring, and iPad windowing all break that assumption. Here's what to use instead in UIKit and SwiftUI.