Single click sign in with Facebook for iOS?

Expo SDK
1

Hi!

Is it possible to fetch information from the system or the Facebook app so the user doesn’t have to enter Facebook credentials with Expo.Facebook.logInWithReadPermissionsAsync? Options look like this:

      {
        permissions: ['public_profile', 'email'],
        behavior: 'web',
      }

On Android, the modal that prompts the user to enter credentials does not appear if the user is already logged in on the phones Facebook app.

Thanks in advance!

2

The docs are here:
https://docs.expo.io/versions/latest/sdk/facebook

If you do browser instead of web for behavior, it will use an SFSafariViewController which may invoke the Facebook app if you are in a standalone app. Try making a standalone build and seeing if this works. I’m not certain of the current behavior.

Note that there is also a system option which used to use the OS integration but that was removed by Apple in iOS 11+ so unless you haven’t updated your OS, this will end up using the browser.

3

Thank you! Browser + standalone app did the trick.

4

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