Flutter learning curve

White screen after uploading to TestFlight

Your app is now ready for testing, uploaded to TestFlight...and yet you get just a white blank screen after app launch?

Here are some potential issues:

  • Just follow directions :) and run flutter build ios --release before you archive and upload to Apple. Close Xcode while you build flutter.
  • Try flutter doctor and flutter clean before you build.
  • Try cleaning the Xcode build folder before archiving.
  • Make sure you are archiving to Generic iOS Device (and not to a specific one)
  • Run on a brand new device locally and verify that nothing crashes in main.dart. If there are crashes before Flutter starts up the UI layer it will not display any errors.