Once our app is finally complete, we have to build it in a special way in preparation for uploading to the iOS app store. We’ll look at exactly how to build and upload the app to the app store, which will allow us to release to beta users using TestFlight, or to release publicly on the store!
In case anyone got errors during the build process: Try opening the .xcworkspace file in xcode instead .xcodeproj. Not sure if this is a change in version 0.65 of react-native.