I wanted to get the UID without using the Facebook API. It can done by using the following method
self.accountStore = [[ACAccountStore alloc]init];
ACAccountType *FBaccountType= [self.accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
NSString *key = @"01234567890123";
NSDictionary *dictFB = [NSDictionary dictionaryWithObjectsAndKeys:key,ACFacebookAppIdKey,@[@"email"],ACFacebookPermissionsKey, nil];
[self.accountStore requestAccessToAccountsWithType:FBaccountType options:dictFB completion:
^(BOOL granted, NSError *e) {
if (granted) {
NSArray *accounts = [self.accountStore accountsWithAccountType:FBaccountType];
//it will always be the last object with single sign on
self.facebookAccount = [accounts lastObject];
//i got the Facebook UID and logged it here (ANSWER)
NSLog(@"facebook account =%@",[self.facebookAccount valueForKeyPath:@"properties.uid"]);
} else {
//Fail gracefully...
NSLog(@"error getting permission %@",e);
}
}];