Best practices

segue_example

//было
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"SegueFromRegistrationToCreateAccount"]) {
        
        CreateAccountVC *vc = segue.destinationViewController;
        
        __weak RegistrationFirstVC *weakSelf = self;
        vc.onCompleteDialogBlock = ^(id result, NSError *error, BOOL isCanceled) {
            [weakSelf.navigationController popViewControllerAnimated:NO];
            [weakSelf makeTransitionAfterSimpleRegistrationWithProfile:result];
        };
        vc.facebookRegistrationUser = self.facebookRegistrationUser;
    }
}

- (void)showRegitrationScreen
{
    [self performSegueWithIdentifier:@"SegueFromRegistrationToCreateAccount"
                              sender:self];
}

//стало
- (void)showRegitrationScreen
{
    JFFPerformSegueCallback callback = ^(UIStoryboardSegue *segue) {
        
        CreateAccountVC *vc = segue.destinationViewController;
        
        __weak RegistrationFirstVC *weakSelf = self;
        vc.onCompleteDialogBlock = ^(id result, NSError *error, BOOL isCanceled) {
            [weakSelf.navigationController popViewControllerAnimated:NO];
            [weakSelf makeTransitionAfterSimpleRegistrationWithProfile:result];
        };
        vc.facebookRegistrationUser = self.facebookRegistrationUser;
    };
    
    [self performSegueWithIdentifier:@"SegueFromRegistrationToCreateAccount"
                              sender:self
                            callback:callback];
}