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

Lei zheng
Lei zheng
7,990 Points
Posted by Lei zheng
Lei zheng
7,990 Points

Let's add a few items to our grocery list. Switch to the implementation file and in the viewDidLoad method, initialize t

how to initalize a property ?

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


}

@end

2 Answers

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

you need to call the alloc method on the NSArray class, not shoppingList

 self.shoppingList = [[NSArray alloc] initWithObjects:@"toothpaste",@"bread", @"eggs",nil];
Lei zheng
Lei zheng
7,990 Points
Lei zheng
Lei zheng
7,990 Points

thank you. it works now.