问题
I have implemented Facebook Login using OAuth 2.0 in my xamarin.forms application.But when I try to navigate to facebook page it gives following error:
You are not logged in: You are not logged in.Please log in and try again.
It works fine with android but not working with ios.
I have searched it but didn't get working solution.
回答1:
I got the solution:
Redirect URL should be same ,when you request for Facebook login and in Facebook settings(Valid OAuth Redirect URI's).
Thank you.
回答2:
If you intend is testing the app in a staging environment, leave the iPhone Store ID field blank and it will allow you to save the iOS platform and test.
来源：https://stackoverflow.com/questions/41393964/you-are-not-logged-in-please-log-in-and-try-again-ios