How to display an NSArray in a label in a storyboard?

Question

I'm really new to programming and having a lot of trouble figuring out how to work with xcode. Im trying to connect an NSArray (which contains various questions and will display those questions in a random order) into a label I have on one of my ViewControllers in a storyboard. I've searched and tried and cant seem to get it. Can anyone help me figure it out? I feel like its really easy I'm just missing something.

Answer 1

Alright. Here's what you do:

1) Declare things…

@interface ViewController ()
{
    NSArray *questionArray;
    UILabel *questionLabel;
}

@end

2) ViewDidLoad:

- (void)viewDidLoad
{
    [super viewDidLoad];
    //create question array
    questionArray = [NSArray arrayWithObjects:@"Question 1?", @"Question 2?", @"Question 3?", @"Question 4?", nil];

    //random a question
    int lowerBound = 0;
    int upperBound = [questionArray count] - 1;
    int randomValue = lowerBound + arc4random() % (upperBound - lowerBound);

    //create UILabel
    questionLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 20)];
    [questionLabel setTextAlignment:NSTextAlignmentCenter];
    [questionLabel setText:[questionArray objectAtIndex:randomValue]];
    [self.view addSubview:questionLabel];

    //create next button
    nextButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 150, 320, 100)];
    [nextButton setTitle:@"Next Question" forState:UIControlStateNormal];
    [nextButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    [nextButton addTarget:self action:@selector(nextQuestionButtonSelected) forControlEvents:UIControlEventTouchUpInside];
}

3) When button clicked..

//Create action connection in the storyboard..
- (IBAction)nextQuestionButtonClicked:(id)sender
{
    //random a question again
    int lowerBound = 0;
    int upperBound = [questionArray count] - 1;
    int randomValue = lowerBound + arc4random() % (upperBound - lowerBound);

    [questionLabel setText:[questionArray objectAtIndex:randomValue]];
}