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

Kevin McNamara
Kevin McNamara
7,483 Points
Posted by Kevin McNamara
Kevin McNamara
7,483 Points

Not Understanding part 3

First of all in step 2, my code did not work when I put nil at the end of the array. It then let me move on to the next step when I removed nil. Now, from what I've learned so far my code for part 3 should work. Anyone see 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 = @[@"toothpaste",@"bread", @"eggs"];
  self.shoppingCart = [shoppingList objectAtIndex: 2];
}

@end

1 Answer

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Basically, the question asks to call the objectAtIndex method on self.shoopingList to retrieve the value of "eggs" from the Array using its index value (remember, index starting from 0), and then assign this value to the self.shoppingCart.

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

Like such, You're very closed, but it's missing the self keyword there.