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

Gregory Benko
Gregory Benko
12,151 Points

How to extract object from NSArray and store it into a string?

seems like Im not pointing correctly...

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!
  self.shoppingList = @[@"toothpaste", @"bread", @"eggs"];
  self.shoppingCart = [*shoppingList objectAtIndex: 2];
}

@end

1 Answer

Arman Arutyunov
Arman Arutyunov
21,900 Points

You had 2 compiler errors:

  1. It has to be "self.shoppingList" not just shoppingList (because it's a property of a class)
  2. You don't need a pointer symbol here

So the following is correct:

self.shoppingCart = [self.shoppingList objectAtIndex: 2];

But you were close! Happy coding!