Objective C array not storing value

Question

Forewarning: I'm going through the Itunes Stanford course for IOS, and I'm a complete noob with this language.

I have this function in my "Deck.m" file.

- (id)init {
 self = [super init];

 if (self) {
     for (NSString *suit in [Card validSuits]) {
         for (NSUInteger rank = 0; rank < [[Card validRanks] count]; rank++) {
             Card *card = [[Card alloc] init];
             card.contents = [[[Card validRanks] objectAtIndex:rank] stringByAppendingString:suit];
             [self.cards addObject:card];
             NSLog(@"%@", [self.cards count]);
         }
     }
 }

 return self;
}

I also have this function in my "Card.h" file (which deck is composed of )

@interface Deck : NSObject

@property (nonatomic, strong) NSMutableArray *cards;

- (Card *)drawRandomCard;

@end

The problem I'm having is that when I print the count when running the program, it's always 0. When i try to print the card, they look fine. When I try to print the card by indexing the array, they're all (null).

What's wrong?

score 4 · Accepted Answer · answered Jun 05 '13 at 03:39

4

self.cards needs to be initialized, otherwise you're calling -[nil addObject:].

answered Jun 05 '13 at 03:39

Wevah

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damn it. the exact problem that the professor of the course clearly stated to watch out for. thanks a ton – volk Jun 05 '13 at 03:41

score 1 · Answer 2 · answered Jun 05 '13 at 03:41

1

I dont think you have initialize the array :

inside init initialize it :

cards=[[NSMutableArray alloc]init];

answered Jun 05 '13 at 03:41

V-Xtreme

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Objective C array not storing value

2 Answers2