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

Matthew Jennings
Matthew Jennings
6,545 Points
Posted by Matthew Jennings
Matthew Jennings
6,545 Points

In Task 2 of the code challenge for Build a Simple iPhone App with Objective-C, the preview is not working.

I believe the answer here is NSArray *shoppingList = [[NSArray alloc] initWithObjects:@"toothpaste", @"bread", "eggs", nil]; but it's not letting me past it and no help given. The video preceeding this challenge did exactly this?

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

2 Answers

Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points
Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points

In your ViewController implementation file you need to use self.shoppingList to initialize the array, instead of declaring it with 'NSArray *shoppingList'. You already did that in the header file. You simply have to refer to the 'property' shoppingList of the main view and allocate memory for it and initialize it.

so it should be:

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