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 Frank Lee
Frank Lee
Courses Plus Student 839 Points

HELP! Creating a Data Model: Task 2 of 3 Challenge

I kept getting the error that I need to make sure all three items are added to the shopping list. Please help! I'm not sure what I'm missing here.

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

3 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

you created a property called shoppingList in the previous task, so access that property. right now you are creating a local variable. you can access the property named shoppingList using self.shoppingList

#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

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

@end
Frank Lee
PLUS
Frank Lee
Courses Plus Student 839 Points
Frank Lee
Frank Lee
Courses Plus Student 839 Points

Thanks Stone!

danielokoronkwo
danielokoronkwo
6,119 Points
danielokoronkwo
danielokoronkwo
6,119 Points

you could also achieve this by using the following code:

self.shoppingList = @[@"toothpaste",@"bread",@"eggs"]