How to officially handle unauthenticated users in an iOS share extension?
问题 That is, what is an idiomatic way to do this that is prescribed by Apple? For any suggestion, please explain HOW that should be done and/or provide a link to official guides. This should be a common enough scenario, but I was only able to find workarounds. Approaching this from the other end, I know that UserDefaults(suiteName:) and Keychain services can be used from the containing app to share information about the authenticated user with the extension, but what if the user installs the app