Deep linking and FBSessionDelegate in Facebook iOS SDK 3.0 - ios

Question

I've read http://developers.facebook.com/docs/howtos/link-to-your-native-app/ and I am confused on how I am supposed to handle deep linking in 3.0. Say the user clicks an appRequest for my app and FB opens my app with a special URL. I have my Appdelegate's openURL method do:
return [FBSession.activeSession handleOpenURL:url];
The tutorial says:
If your app requires an authorized user, handle the processing of the target URL in the
SDK callbacks implemented after a successful login, the fbDidLogin method.
However, the fbDidLogin delegate method is no longer called because in 3.0 we switch to using FBSession.activeSession instead of using a facebook.m object. In fact, none of the FBSessionDelegate methods will ever be called because the facebook object's state is never changed. So where should I process the URL?

Answer 1

You would likely handle this in the handler you've set up when opening a session.
Say for example that you opened the session using something like:
[FBSession openActiveSessionWithReadPermissions:nil
allowLoginUI:YES
completionHandler:^(FBSession *session,
FBSessionState state,
NSError *error) {
[self sessionStateChanged:session
state:state
error:error];
}];
You could put put the deep linking handling code in the method set to handle session changes that you can define, ex:
- (void)sessionStateChanged:(FBSession *)session
state:(FBSessionState) state
error:(NSError *)error
{
switch (state) {
case FBSessionStateOpen:
if (!error) {
// Handle deep link
}
break;
case FBSessionStateClosed:
self.user = nil;
break;
case FBSessionStateClosedLoginFailed:
self.user = nil;
[FBSession.activeSession closeAndClearTokenInformation];
break;
default:
break;
}
if (error) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:#"Error"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alertView show];
}
}
To see a working sample for deep link handling, see https://github.com/fbsamples/ios-social-cafe/