You may use NSNotificationCenter
for this purpose:
[self.account requestAccessToAccountsWithType:facebookAccount
options:options
completion:^(BOOL success, NSError *error){
if(success){
NSArray *accounts = [self.account accountsWithAccountType:facebookAccount];
self.account = [accounts lastObject];
// You post a notification that the UI should update here
[[NSNotificationCenter defaultCenter] postNotificationName:@"UpdateUI" object:nil];
}
else{
NSLog(@"Erro %@", [error description]);
}
}];
Then, you add your viewController that should update its UI as an observer of this notification:
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(updateUI) name:@"UpdateUI" object:nil];
}
- (void)updateUI {
// Here you actually update your UI
}
p.s. if you are not using arc you also remove the observer in dealloc:
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];