Xcode 27: The Build Settings That Can Stop a Release
An unchanged Java app can stop building because a number inside its generated Xcode project is now too low. No new API call, no changed screen, just a deployment target the new SDK refuses to accept. What is Codename One? Codename One is an open-source framework for building native iOS, Android, desktop, and web apps from a single Java or Kotlin codebase. Learn more at codenameone.com . That was…
Codename One is an open-source framework for building native applications across multiple platforms using a single Java or Kotlin codebase. When transitioning from Xcode 26 to Xcode 27, several build settings were updated to address compatibility issues. The builder now checks the selected SDK's minimum deployment targets and adjusts the application's settings accordingly.
If the project uses deprecated build hints, the builder will stop with an error explaining the changes. The three removed build hints are codename1.arg.ios.generateSplashScreens, codename1.arg.ios.uiscene, and codename1.arg.ios.launchStoryboardName. To update your application, replace these hints with codename1.arg.ios.generateSplashScreens for custom launch screens, and test on target devices.
A separate check ensures the finished Info.plist contains a supported root launch declaration and UIApplicationSceneManifest for iOS SDK 27 or later builds. After updating your project, rebuild and verify that the SDK selected in the build log, effective deployment targets, and removed hints are no longer present. If the submission is still rejected, provide the rejection text, relevant build hints, and the build log to the development team for further assistance.
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