iPhone Duo for iOS Developers: What Actually Changes in Your Swift Code

Based on the provided information, here are the key changes and APIs introduced in iOS 16 for supporting foldable devices:

Changes

1. Reserved Regions:

   • New regions like safeArea, safeAreaInsets, and safeAreaFrame that account for hinge gaps.
   • Use .edgesIgnoringSafeArea(.all) to ignore safe areas.

2. Arrangement API:

   • Two types: Split (side-by-side) and Overlay (stacked).
   • Split prefers stacking, moves to side-by-side as device folds.
   • Overlay prefers stacking content above/below, moves to side-by-side on fold.

3. Hinge API:

   • Provides coarse status (closed/partially open/fully open) and continuous angle.
   • Use onHingeChange in SwiftUI or UIHingeInteraction in UIKit.

4. Multiple Scenes:

   • Supports two apps side-by-side on iPhone for the first time.
   • Same tools as resizing on iPad or iPhone mirroring (size classes, scene geometry).

Key APIs

1. Reserved Regions:

   swift
    
   1struct ContentView: View {
   2    var body: some

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