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

Posted by Renan A
Renan A
4,425 Points

Assigning an object from a shoppingList NSArray as a shoppingCart NSString value

Can't figure out what's wrong

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

shoppingCart = [shoppingList objectAtIndex:2];
}

@end

3 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi Renan,

You're very close.

You need to use self on the array variable name and the NSString too:

  self.shoppingList = [[NSArray alloc]initWithObjects: @"toothpaste",@"bread",@"eggs",nil];
  self.shoppingCart = [self.shoppingList objectAtIndex: 2];

I hope that helps,

Steve.

Anjali Pasupathy
Anjali Pasupathy
28,883 Points
Anjali Pasupathy
Anjali Pasupathy
28,883 Points

You're nearly there! You just need to call self.shoppingCart and self.shoppingList in the last line of viewDidLoad:

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

I hope this helps!

Sai Kiran Dasika
PLUS
Sai Kiran Dasika
Courses Plus Student 7,278 Points
Sai Kiran Dasika
Sai Kiran Dasika
Courses Plus Student 7,278 Points

What you have done is correct except you made a silly mistake by not adding the self keyword before the shopping cart as it's a property of the ViewController class. The following code should work properly

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