How to fix: Incomplete Implementation - objective-c

Question

How can I fix the problem of Incomplete Implementation?
View of Controller.m :
#import "Quiz_GameViewController.h"
#implementation Quiz_GameViewController
#synthesize theQuestion, timer, theScore, theLives, answerOne, answerTwo, answerThree, answerFour, theQuiz
;
-(void)askQuestion
{
// Unhide all the answer buttons.
[answerOne setHidden:NO];
[answerTwo setHidden:NO];
[answerThree setHidden:NO];
[answerFour setHidden:NO];
// Set the game to a "live" question (for timer purposes)
questionLive = YES;
// Set the time for the timer
time = 8.0;
// Go to the next question
questionNumber = questionNumber + 1;
// We get the question from the questionNumber * the row that we look up in the array.
NSInteger row = 0;
if(questionNumber == 1)
{
row = questionNumber - 1;
}
else
{
row = ((questionNumber - 1) * 6);
}
// Set the question string, and set the buttons the the answers
NSString *selected = [theQuiz objectAtIndex:row];
NSString *activeQuestion = [[NSString alloc] initWithFormat:#"Question: %#", selected];
[answerOne setTitle:[theQuiz objectAtIndex:row+1] forState:UIControlStateNormal];
[answerTwo setTitle:[theQuiz objectAtIndex:row+2] forState:UIControlStateNormal];
[answerThree setTitle:[theQuiz objectAtIndex:row+3] forState:UIControlStateNormal];
[answerFour setTitle:[theQuiz objectAtIndex:row+4] forState:UIControlStateNormal];
rightAnswer = [[theQuiz objectAtIndex:row+5] intValue];
// Set theQuestion label to the active question
theQuestion.text = activeQuestion;
// Start the timer for the countdown
timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(countDown) userInfo:nil repeats:YES];
[selected release];
[activeQuestion release];
}
-(void)updateScore
{
// If the score is being updated, the question is not live
questionLive = NO;
[timer invalidate];
// Hide the answers from the previous question
[answerOne setHidden:YES];
[answerTwo setHidden:YES];
[answerThree setHidden:YES];
[answerFour setHidden:YES];
NSString *scoreUpdate = [[NSString alloc] initWithFormat:#"Score: %d", myScore];
theScore.text = scoreUpdate;
[scoreUpdate release];
// END THE GAME.
NSInteger endOfQuiz = [theQuiz count];
if((((questionNumber - 1) * 6) + 6) == endOfQuiz)
{
// Game is over.
if(myScore > 0)
{
NSString *finishingStatement = [[NSString alloc] initWithFormat:#"Game Over!\nNice Game \nYou scored %i!", myScore];
theQuestion.text = finishingStatement;
[finishingStatement release];
}
else
{
NSString *finishingStatement = [[NSString alloc] initWithFormat:#"Game Over!\n You're terrible! \nYou scored %i.", myScore];
theQuestion.text = finishingStatement;
[finishingStatement release];
}
theLives.text = #"";
// Make button 1 appear as a reset game button
restartGame = YES;
[answerOne setHidden:NO];
[answerOne setTitle:#"Restart game!" forState:UIControlStateNormal];
}
else
{
// Give a short rest between questions
time = 3.0;
// Initialize the timer
timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(countDown) userInfo:nil repeats:YES];
}
}
-(void)countDown
{
// Question live counter
if(questionLive==YES)
{
time = time - 1;
theLives.text = [NSString stringWithFormat:#"Time remaining: %i!", time];
if(time == 0)
{
// Loser!
questionLive = NO;
theQuestion.text = #"HAHA now you lost alot of points!";
myScore = myScore - 1000;
[timer invalidate];
[self updateScore];
}
}
// In-between Question counter
else
{
time = time - 1;
theLives.text = [NSString stringWithFormat:#"Next question coming in...%i!", time];
if(time == 0)
{
[timer invalidate];
theLives.text = #"";
[self askQuestion];
}
}
if(time < 0)
{
[timer invalidate];
}
}
- (IBAction)buttonOne
{
if(questionNumber == 0){
// This means that we are at the startup-state
// We need to make the other buttons visible, and start the game.
[answerTwo setHidden:NO];
[answerThree setHidden:NO];
[answerFour setHidden:NO];
[self askQuestion];
}
else
{
NSInteger theAnswerValue = 1;
[self checkAnswer:(int)theAnswerValue];
if(restartGame==YES)
{
// Create a restart game function.
}
}
}
- (IBAction)buttonTwo
{
NSInteger theAnswerValue = 2;
[self checkAnswer:(int)theAnswerValue];
}
- (IBAction)buttonThree
{
NSInteger theAnswerValue = 3;
[self checkAnswer:(int)theAnswerValue];
}
- (IBAction)buttonFour
{
NSInteger theAnswerValue = 4;
[self checkAnswer:(int)theAnswerValue];
}
// Check for the answer (this is not written right, but it runs)
-(void)checkAnswer:(int)theAnswerValue
{
if(rightAnswer == theAnswerValue)
{
theQuestion.text = #"Daaamn";
myScore = myScore + 50;
}
else
{
theQuestion.text = #"hahaha!";
myScore = myScore - 50;
}
[self updateScore];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
questionLive = NO;
restartGame = NO;
theQuestion.text = #"Think you can do it?";
theScore.text = #"Score:0";
theLives.text = #"";
questionNumber = 0;
myScore = 0;
myLives = 0;
[answerOne setTitle:#"I think i can!" forState:UIControlStateNormal];
[answerTwo setHidden:YES];
[answerThree setHidden:YES];
[answerFour setHidden:YES];
[self loadQuiz];
}
-(void)loadQuiz
{
// This is our forced-loaded array of quiz questions.
// FORMAT IS IMPORTANT!!!!
// 1: Question, 2 3 4 5: Answers 1-4 respectively, 6: The right answer
// THIS IS A TERRIBLE WAY TO DO THIS. I will figure out how to do nested arrays to make this better.
NSArray *quizArray = [[NSArray alloc] initWithObjects:#"Who is the president in USA?",#"Me",#"Obama",#"George Bush",#"Justin Bieber",#"2",
#"Capital in Norway?", #"Bergen", #"Trondheim", #"Oslo", #"Bærum", #"3",
#"The right answer is 3!", #"41", #"24", #"3", #"9", #"1",
#"Do I have a cat?", #"Yes", #"No", #"No, you have a dog", #"No, you have a flying hamster", #"4",
#"Baba", #"Daba jaba?", #"Laba daba haba?", #"Saba daba gaba?", #"Haba haba?", #"4",
nil];
self.theQuiz = quizArray;
[quizArray release];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)dealloc {
[theQuestion release];
[theScore release];
[theLives release];
[answerOne release];
[answerTwo release];
[answerThree release];
[answerFour release];
[theQuiz release];
[timer release];
[super dealloc];
}
#end
I'am new here and this is an example script from the internet...I use it to learn the language Objective-C and Cocoa...ViewController.h :
#import <UIKit/UIKit.h>
#interface Quiz_GameViewController : UIViewController {
IBOutlet UILabel *theQuestion;
IBOutlet UILabel *theScore;
IBOutlet UILabel *theLives;
IBOutlet UIButton *answerOne;
IBOutlet UIButton *answerTwo;
IBOutlet UIButton *answerThree;
IBOutlet UIButton *answerFour;
NSInteger myScore;
NSInteger myLives;
NSInteger questionNumber;
NSInteger rightAnswer;
NSInteger time;
NSArray *theQuiz;
NSTimer *timer;
BOOL questionLive;
BOOL restartGame;
}
#property (retain, nonatomic) UILabel *theQuestion;
#property (retain, nonatomic) UILabel *theScore;
#property (retain, nonatomic) UILabel *theLives;
#property (retain, nonatomic) UIButton *answerOne;
#property (retain, nonatomic) UIButton *answerTwo;
#property (retain, nonatomic) UIButton *answerThree;
#property (retain, nonatomic) UIButton *answerFour;
#property (retain, nonatomic) NSArray *theQuiz;
#property (retain, nonatomic) NSTimer *timer;
-(IBAction)buttonOne;
-(IBAction)buttonTwo;
-(IBAction)buttonThree;
-(IBAction)buttonFour;
-(void)checkAnswer;
-(void)askQuestion;
-(void)updateScore;
-(void)loadQuiz;
-(void)countDown;
#end

Answer 1

In your headerfile, you have declared the method -(void)checkAnswer, while in the .m file you have declared it -(void)checkAnswer:(int)theAnswerValue.
This means that your .m file is looking for a method -(void)checkAnswer, which does not exist, and it yields an Incomplete implementation warning. Simply change your declaration in the .h file to - (void)checkAnswer:(int)theAnswerValue, and you'll be fine.

Answer 2

See in .h you have (method with no parameters):
-(void)checkAnswer;
and in .m you have (method with one int parameter):
-(void)checkAnswer:(int)theAnswerValue
Incomplete Implementation means you declared something in .h but didn't implement that in .m.

Answer 3

The signature of checkAnswer is different in you .h and .m
in Quiz_GameViewController.h:
-(void)checkAnswer;
in Quiz_GameViewController.m
-(void)checkAnswer:(int)theAnswerValue
FIX : Change the Quiz_GameViewController.h to:
- (void)checkAnswer:(int)theAnswerValue,