StackOverflow2013

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copied!<p>Nothing strikes me as being <em>that</em> odd in your code, but there are a couple of little things I'd check...</p> <p>Your call to <code>[UIImage imageNamed:]</code> needs to take a string as a parameter, yet it <em>appears</em> (at least by the name of your array) that you are passing in a UIImage object. The code should be one of the following:</p> <pre><code>UIImage *img = [UIImage imageNamed:[arrayAnswerImageNames objectAtIndex:index]]; // Note "Names" array </code></pre> <p>or:</p> <pre><code>UIImage *img = (UIImage *)[arrayAnswerImages objectAtIndex:index]; </code></pre> <p>depending on how you want to build your 'images' array; with images, or imageNames. Also, I presume the frame of your buttons are set, and that they are added to a view?</p> <p>Hope you get it sorted.</p> <p><br> <strong>EDIT</strong></p> <p>Just looked at your additional code. Just a thought - have you initialised your array <code>arrayQuestionImages</code>? Make sure you call something similar to:</p> <pre><code>self.arrayQuestionImages = [NSMutableArray arrayWithCapacity:10]; </code></pre> <p>prior to adding the objects.</p> <p>Also, using a switch statement in the way you have shown above looks a bit obfuscated. Personally, I would do something like the following:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.questionImageNames = [NSArray arrayWithObjects:@"bear.jpg", @"girraf.jpg", @"hippo.jpg", @"monkey.jpg", @"piglet.jpg", @"pumba.jpg", @"rabbit.jpg", @"simba.jpg", @"snake.jpg", @"tigger.jpg", @"turtle.jpg", nil]; NSMutableArray *buttonArray = [NSMutableArray arrayWithCapacity:10]; for (int i = 0; i < NUM_BUTTONS; i++) { NSUInteger index = arc4random() % NUM_BUTTONS; UIButton *newButton = [UIButton buttonWithType:UIButtonTypeCustom]; newButton.frame = CGRectMake(i * x, i * y, width, height); // Whatever position and size you need... UIImage *buttonImage = [UIImage imageNamed:[self.questionImageNames objectAtIndex:index]]; [newButton setBackgroundImage:buttonImage forState:UIControlStateNormal]; [self.view addSubview:newButton]; [buttonArray addObject:newButton]; } self.myButtons = buttonArray; // Where myButtons is a NSArray property of your class, to store references to the buttons. } </code></pre>

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