Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Simple iPhone App with Objective-C Creating a Data Model Creating a Data Collection

Posted by sassyn
sassyn
5,981 Points

What is wrong with this statement? Stuck on code challenge

The challenge question is to initialize the shopping list array with 3 items.

NSArray *shoppingList = [[NSArray alloc]initWithObjects:@"toothpaste", @"bread", @"eggs", nil];

ViewController.h 
#import "UIViewController.h"

@interface ViewController : UIViewController

@property (strong, nonatomic) NSString *shoppingCart;
@property (strong, nonatomic) NSArray *shoppingList;

@end
ViewController.m 
#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Add your code below!
  NSArray *shoppingList = [[NSArray alloc]initWithObjects:@"toothpaste", @"bread", @"eggs", nil];
}

@end

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

You have already declared the property to be a NSArray so you don't need to do that again.

However, you need to access the property using the self keyword:

self.shoppingList = [[NSArray alloc] initWithObjects:@"toothpaste", @"bread", @"eggs", nil];

I hope that helps.

Steve.

sassyn
sassyn
5,981 Points

Thanks! The error message that I got would have never led me to realize that I was declaring shoppingList again.

Steve Hunter
Steve Hunter
57,712 Points

Glad it helped! :-)

Steve.