#protocol with integers - objective-c

Question

I am trying to make a protocol for a detail view for a tableView. The detail view has a question and then an answer. If I get the answer correct, it will set an integer to increase by 1 in a protocol method.
I am new to protocols and I don't understand what I am doing wrong.
Code
DetailViewController.h
Where the protocol is made
#import "Question.h"
#protocol DetailQuestionViewControllerDelegate <NSObject>
-(void)questionsCorrectHasChangedTo:(int)questionNumberChanged;
#end
#interface DetailQuestionViewController : UIViewController
#property (nonatomic, strong) Question *selectedQuestion;
#property (strong, nonatomic) IBOutlet UILabel *questionLabel;
#property (strong, nonatomic) IBOutlet UITextField *answerField;
#property (strong, nonatomic) IBOutlet UILabel *correctLabel;
#property (nonatomic,strong) id <DetailQuestionViewControllerDelegate> delegate;
#property (assign, nonatomic) int questionsCorrect;
DetailViewController.m
#implementation DetailQuestionViewController
#synthesize questionLabel;
#synthesize answerField;
#synthesize correctLabel;
#synthesize selectedQuestion;
#synthesize questionsCorrect;
#synthesize delegate;
- (void)viewDidLoad
{
[super viewDidLoad];
// Sets the questionLabel to the question we put in the array
self.questionLabel.text = [selectedQuestion questionName];
// Sets the navigation title to the rowName we put in the array
self.navigationItem.title = [selectedQuestion questionRowName];
NSLog(#"The question's answer for the question you selected is %#", [selectedQuestion questionAnswer]);
}
- (IBAction)checkAnswer:(UITextField *)sender
{
if ([[selectedQuestion questionAnswer] caseInsensitiveCompare:answerField.text] == NSOrderedSame)
{
// Show the correct label
[correctLabel setHidden:NO];
correctLabel.text = #"Correct!";
correctLabel.textColor = [UIColor greenColor];
*questionsCorrect = 1;
NSLog(#"questionsCorrect int is %d", questionsCorrect);
[self.delegate questionsCorrectHasChangedTo:questionsCorrect];*
}
else
{
// Show the incorrect label
[correctLabel setHidden:NO];
correctLabel.text = #"Incorrect";
correctLabel.textColor = [UIColor redColor];
}
// Erase the text in the answerField
answerField.text = #"";
}
ScoreViewController.h
Now here is my ScoreView which will be acsessing the delegate
#import <UIKit/UIKit.h>
#import "DetailQuestionViewController.h"
#interface ScoreViewController : UIViewController *<DetailQuestionViewControllerDelegate>*
#property (strong, nonatomic) IBOutlet UILabel *scoreLabel;
- (IBAction)resetButtonClicked:(UIButton *)sender;
-(void)checkScore;
#end
ScoreViewController.m
#import "ScoreViewController.h"
#import "DetailQuestionViewController.h"
#interface ScoreViewController ()
#end
#implementation ScoreViewController
#synthesize scoreLabel;
- (void)viewDidLoad
{
[super viewDidLoad];
*DetailQuestionViewController *dqvc = [[DetailQuestionViewController alloc] init];
dqvc.delegate = self;*
}
-(void)viewWillAppear:(BOOL)animated
{
[self checkScore];
}
-(void)checkScore
{
}
- (IBAction)resetButtonClicked:(UIButton *)sender
{
}
#pragma mark - DetailQuestionViewControllerDelegate -
*-(void)questionsCorrectHasChangedTo:(int)questionNumberChanged*
{
//set the textlabel text value to the number of questions correct
NSLog(#"questionsNumberChanged is %i", questionNumberChanged);
scoreLabel.text = [NSString stringWithFormat:#"You answered %d questions correctly",questionNumberChanged];
}
#end
The label is never updating for some reason.
Sorry for making the question so long, tried to be very specific.

Answer 1

I'm guessing somewhat here as you talk about increasing a value in a protocol method, yet you don't have a single + or ++ anywhere... You also have quite a few *'s sprinkled in strange places in your sample code, it is unclear whether these are typos, intended as emphasis, or intended to be pointer indirection.
So you have a property questionsCorrect in your DetailQuestionViewController class so let's assume this is the class you expect to own the counter (we'll skip that this is a view and not a model class...). If this is the idea then lines:
*questionsCorrect = 1;
NSLog(#"questionsCorrect int is %d", questionsCorrect);
[self.delegate questionsCorrectHasChangedTo:questionsCorrect];*
should be:
self.questionsCorrect++; // increment the counter
NSLog(#"questionsCorrect int is %d", self.questionsCorrect);
[self.delegate questionsCorrectHasChangedTo:self.questionsCorrect];
(you can also declare the instance variable questionsCorrect yourself and drop the use of self. above - whichever you prefer)
Now just go through and remove the other cases of extra *'s if they are in your code as well as the sample above and you'll be a bit closer to your goal.
If alternatively you wish ScoreViewController to own the counter then you need to declare it there and provide a method to increment and display it.
HTH