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

Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points
Posted by Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points

retrieving string from Array and assigning it to an NSString

Hi Guys,

What am I doing wrong here (at line 10)? I need to get the string "eggs" from the NSArray shoppingList and put it in the NSString shoppingCart.

Note: adding self(dot) to shoppingList in line 10 does not work

ViewController.h 
#import "UIViewController.h"

@interface ViewController : UIViewController

@property (strong, nonatomic) NSString *shoppingCart;
@property (strong, nonatomic) NSArray *shoppingList;

@end

#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Add your code below!
    self.shoppingList = [[NSArray alloc] initWithObjects:@"toothpaste", @"bread", @"eggs", nil];
    self.shoppingCart.text = [shoppingList objectAtIndex:2];
}

@end

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

You're very close - but there's no need to add .text to the variable:

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

Hope that helps,

Steve.

Madhukar Narahari
Madhukar Narahari
8,965 Points

Hi Steve,

Could you let me know why we took that ".text" away?

Steve Hunter
Steve Hunter
57,712 Points

Hi Madhukar,

There.s no need for a .text. The variable, shoppingCart is declared as a String. A String object doesn't use a .text method to assign a string value to it. The array method objectAtIndex: returns the contents of the array at the specified element position. In this case, that returns a String which is assigned directly into the string variable that had already been declared.

I hope that makes sense!

Steve.