Sign In with Apple: How to achieve it for existing app?
问题 With recent major updates released by Apple on 3rd June 2019, there is one feature Sign In with Apple. Information about 'how to use this' in app is available but I can see any sample source code, how to achieve this feature in your existing iOS app. I'm looking for a sample source code, as I can't understand how to start with this. And what I've tried: Sign In with Apple 回答1: First step is you need to import AuthenticationServices How to check that user credential state let appleIDProvider =