I just upgraded my app from Facebook iOS SDK 3.1 to 3.2.1 and I'm trying to take advantage of the new error handling provided by the new FBError category on NSError. The code is at the bottom. It compiles fine, but when a FB error occurs, I get the following at run time:

- [NSError fberrorShouldNotifyUser]: unrecognized selector sent to instance

This seems like a linker error, where the category is not getting linked in from the the FacebookSDK static library. I tried adding both the -ObjC and -all_load flags under the other linker flags in the target. I read this: http://developer.apple.com/library/mac/#qa/qa1490/ but still no luck.

Basically the same code works fine in the sample projects provided by Facebook. Thanks for any suggestions.

// Open the Facebook session.
- (void)openSession {
    NSArray *permissions = [[NSArray alloc] initWithObjects:@"email", nil];

    // Open or re-open the active session
    [FBSession openActiveSessionWithReadPermissions:permissions
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
        [self sessionStateChanged:session state:state error:error];
    }];
}

- (void)handleAuthError:(NSError *)error{
    NSString *alertMessage, *alertTitle;

    if (error.fberrorShouldNotifyUser) {
        // If the SDK has a message for the user, surface it. This conveniently
        // handles cases like password change or iOS6 app slider state.
        alertTitle = @"Something Went Wrong";
        alertMessage = error.fberrorUserMessage;
   } else if (error.fberrorCategory == FBErrorCategoryAuthenticationReopenSession) {
        // It is important to handle session closures as mentioned. You can inspect
        // the error for more context but this sample generically notifies the us
ios runtime-error facebook-ios-sdk objective-c-category
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