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Xcode 27 / the iOS 27 SDK asserts at startup unless the app uses a scene-based lifecycle. Create the React Native window from SceneDelegate using the 0.87 startReactNative(launchOptions:) API. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Apps generated from this 0.87 template crash immediately on launch when built with Xcode 27 / the iOS 27 SDK. UIKit asserts in
___UIApplicationEvaluateRuntimeIssueForNoSceneLifecycleAdoptionbecause the template still createsUIWindowfromAppDelegateand does not declare a scene manifest.This migrates the iOS template to the UIScene lifecycle using APIs that already exist on React Native 0.87 (
startReactNative(withModuleName:in:launchOptions:)). It does not depend onRCTSceneDelegateorconnectionOptions:, which only landed on 0.88+/main.Related:
Changelog
[IOS] [FIXED] - Adopt UIScene lifecycle so apps built with Xcode 27 launch on iOS 27
Test Plan
NoSceneLifecycleAdoptionyarn testin this repoMade with Cursor