I was previously using Facebook SDK 3.x for iOS. My code has FBSession openActiveSessionWithReadPermissions in various places, and now that I am using version 4.x I'm not sure what the replacement is
I am thinking it is the login methods but I'm not sure what the 1:1 replacement/equivalent is.
Correct. You can convert over to using the following
FBSDKLoginManagermethod:Or if looking for publishing permissions you can use: