_TestApp.setSemantics

arm64-apple-ios-simulator.swiftinterface

@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, *)
@_originallyDefinedIn(module: "SwiftUI", iOS 18.0)
@_originallyDefinedIn(module: "SwiftUI", macOS 15.0)
@_originallyDefinedIn(module: "SwiftUI", tvOS 18.0)
@_originallyDefinedIn(module: "SwiftUI", watchOS 11.0)
public struct _TestApp {
  public init()
  public func setSemantics(_ version: Swift.String) // Add this line in your SDK - iPhoneSimulator.sdk/System/Library/Frameworks/SwiftUICore.framework/Modules/SwiftUICore.swiftmodule/arm64-apple-ios-simulator.swiftinterface
}

SemanticsTestsApp.swift

// Ref: https://x.com/KyleSwifter/status/1899663558914572653
// The iOS 18 SwiftUI SDK has an API to change the semantic - _TestApp().setSemantics(xx).
// Remember to make it public in your SDK.
// For lower OS version, the API does not exist.
// But  `_TestApp.run()` will read and set it from the `CommandLine.arguments` after `--semantics`.

@main
struct SemanticsTestsApp: App {
    init() {
        let app = _TestApp()
        app.setSemantics("latest")
        // app.run()
    }

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}