问题
Preparing an app for iOS 11, I noticed there is a system alert showing up every time the user click on the "Facebook login" button. Does somebody know how to prevent this alert from appearing?. Now Social Networks integrations have been removed from the system and together with the Safari View Controller cookies storage changes (to not be shared) it sounds Apple has also added this extra alert to the sign up - sign in flow whenever you try to connect with Facebook. Has some body experienced the same issue in your apps?. Thanks for your comments.
回答1:
It's not an issue. It's by design. Part of the authorization workflow when working with SFAuthenticationSession in iOS 11+ and you can't avoid it since it's a user permission request.
If an application uses SFAuthenticationSession, users are prompted by a dialog to give explicit consent, allowing the application to access the website's data in Safari.
SFAuthenticationSession docs
来源：https://stackoverflow.com/questions/45858774/ios-11-facebook-signin-is-showing-an-initial-system-alert