iPhone Duo Developer Resource Sandbox

Effective Display Width

2358 px

1179 + 1179 px spanned

Effective Display Height

2556 px

Full OLED vertical canvas

Calculated Aspect Ratio

1.84:1

Continuous Dual Canvas

API Compatibility

Full Dual-Screen Bridge Active

SwiftUI Multi-Window v2

Platform Status

Ready for October SDK

Hinge Sensor Calibration 135°

Hardware & API Controls

Device Profile Apple Silicon Fold

Hinge Fold Angle (°) 135° (Book Mode)

0° (Closed) 90° (Laptop/Desk) 135° (Book) 180° (Flat)

Target Framework

Display Layout Mode Active

Primary W (px)

Primary H (px)

Secondary W (px)

Secondary H (px)

Apple Developer Note (Oct 2026):

When hinge angle θ < 45°, layout engine enters clamshell glance mode. At 135°, dual views maintain active continuous context.

135° Hinge Angle Dual Screen Canvas

Screen 0 (Primary) 1179x2556

NavigationSplitView

Master sidebar layout active with adaptive column auto-collapse.

@Environment(\.hingeAngle)

angle: Angle(degrees: 135.0)

Left Panel Safe Area: Top 54pt

Screen 1 (Secondary) 1179x2556

Detail Stage Content

Dual-window continuity bridge rendering sub-view scene.

HingeState.posture

.bookPosture(halfFolded)

Right Panel Safe Area: Top 54pt

Drag slider to simulate real-time hinge articulation & SwiftUI posture updates Scale: 1:3.1 Responsive Canvas

SwiftUI Architecture & Continuity Guidance

Book Mode Configuration

Recommended Architecture Action:

Deploy layout size classes for dual-display continuity

With 135° angle, the Duo operates in Book Posture. Provide dual columns with adaptive NavigationSplitView. Size classes report Compact horizontal per window and Regular horizontal across the unified bridge.

Generated Bridge Implementation

import SwiftUI

@main
struct iPhoneDuoApp: App {
    @Environment(\.dualScreenPosture) private var posture
    
    var body: some Scene {
        WindowGroup {
            DualDisplayRootView()
                .dualScreenContinuity(mode: .continuousCanvas)
                .onHingeAngleChange { angle in
                    // Angle: 135° -> .bookMode
                    LayoutEngine.adaptLayout(for: angle)
                }
        }
    }
}