delegation issue with dismissing multiple view controllers - ios

Question

I asked a question about dismissing multiple view controllers previously and the answers that i was given along with the possible solutions i found elsewhere have all failed to achieve the desired effect. i have narrowed down my issue to something with the way i set up my delegation. the code is below and i would really appreciate any feedback.
my full project can be downloaded here: https://www.yousendit.com/download/TEhWckhYQVNYSHpIRHNUQw
Thanks.
//
// QuestionViewController.h
// learningTheRopes1
//
// Created by James Ulle on 7/18/12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "Question.h"
#import "AnswerViewController.h"
#interface QuestionViewController : UIViewController <AnswerViewControllerDelegate>
#property (weak, nonatomic) IBOutlet UILabel *currentQuestionDisplay;
#property (weak, nonatomic) IBOutlet UITextField *userAnswerTextField;
#property (nonatomic, strong) Question *currentQuestion;
- (IBAction)dismissKeyboard:(id)sender;
- (void)dismissQVC;
#end
//
// QuestionViewController.m
// learningTheRopes1
//
// Created by James Ulle on 7/18/12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import "QuestionViewController.h"
#interface QuestionViewController ()
#end
#implementation QuestionViewController
#synthesize currentQuestionDisplay;
#synthesize userAnswerTextField;
#synthesize currentQuestion;
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
AnswerViewController *avc = [segue destinationViewController];
[avc setCurrentQuestion:currentQuestion];
[avc setUserAnswer:[userAnswerTextField text]];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self.currentQuestionDisplay setText:[currentQuestion question]];
// Do any additional setup after loading the view.
}
- (void)viewDidUnload
{
[self setCurrentQuestionDisplay:nil];
[self setUserAnswerTextField:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)dismissKeyboard:(id)sender {
[userAnswerTextField resignFirstResponder];
}
- (void)dismissQVC {
NSLog(#"Dismiss QVC");
[self.navigationController popViewControllerAnimated:NO];
}
#end
//
// AnswerViewController.h
// learningTheRopes1
//
// Created by James Ulle on 7/18/12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "Question.h"
#protocol AnswerViewControllerDelegate <NSObject>
- (void)dismissQVC;
#end
#import "QuestionViewController.h"
#interface AnswerViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *displayCurrentAnswer;
#property (nonatomic, strong) Question *currentQuestion;
#property (nonatomic, strong) NSString *userAnswer;
#property (nonatomic, weak) id <AnswerViewControllerDelegate> delegate;
- (IBAction)dismissAnswerVC:(id)sender;
#end
//
// AnswerViewController.m
// learningTheRopes1
//
// Created by James Ulle on 7/18/12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import "AnswerViewController.h"
#interface AnswerViewController ()
#end
#implementation AnswerViewController
#synthesize displayCurrentAnswer;
#synthesize currentQuestion;
#synthesize userAnswer;
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
if([userAnswer isEqualToString:currentQuestion.answer]) {
[self.displayCurrentAnswer setText:#"You are correct!"];
}
else {
[self.displayCurrentAnswer setText:#"You are wrong!"];
}
// Do any additional setup after loading the view.
}
- (void)viewDidUnload
{
[self setDisplayCurrentAnswer:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)dismissAnswerVC:(id)sender {
[self dismissViewControllerAnimated:YES completion:^{
NSLog(#"Dismiss AVC");
[[self delegate] dismissQVC];
}];
}
#end
and finally my output is this (which shows that the completion block in indeed called, but the delegate call back to dimissQVC does not happen:
2012-08-03 19:04:34.235
learningTheRopes1[4165:f803] Dismiss AVC

Answer 1

In the prepareForSegue method, you missed this line:
avc.delegate = self;