CODEWITHSUNDEEP
iphoneiosnsstringnsmutablearraynsuserdefaults
Christoffer
Christoffer

Reputation: 1647

NSUserDefaults won't store my NSStrings

i've tried to store a couple of strings in my NSUserDefaults... can't figure out what i'm doing wrong...

-(IBAction)addToFavorite:(id)sender {
    NSMutableArray* favoritedAlready = [[[NSUserDefaults standardUserDefaults] objectForKey:@"favorites"] mutableCopy];

NSLog(@"%@",favoritedAlready);


    if (![favoritedAlready containsObject:indexPathRowString]) {
        [favoritedAlready addObject:indexPathRowString];
        [[NSUserDefaults standardUserDefaults] setObject:favoritedAlready forKey:@"favorites"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        favoritMarkerad.image = [UIImage imageNamed:@"StarFilled.png"];}

    else {
        [favoritedAlready removeObject:indexPathRowString];
        [[NSUserDefaults standardUserDefaults] setObject:favoritedAlready forKey:@"favorites"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        favoritMarkerad.image = [UIImage imageNamed:@"StarEmpty.png"];
   }

when I try to load my array in another viewcontroller nothing happens.. 

(.h)
NSMutableArray *favorites_;
@property (nonatomic, retain) NSMutableArray *favorites_;

(.m)
@synthesize favorites_;

-(void)makeData{

NSMutableArray* favoritedAlready = [[NSUserDefaults standardUserDefaults] objectForKey:@"favorites"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    favorites_ = favoritedAlready;}

"NSLog(@"%@",favoritedAlready);" gives "2012-01-25 14:53:26.360 myApp[2752:1be03] (null)" any ideas?

Upvotes: 0

Views: 428

Answers (2)

basvk
basvk

Reputation: 4546

The NSMutableArray is (null) at the first point, so you could do this:

    if (favoritedAlready == nil) {
        favoritedAlready = [[NSMutableArray alloc] init];
    }

right after the mutableCopy method. So you'll be adding values to the NSMutableArray instead of adding it to a (null) object

Just like what Tommy said

Upvotes: 1

Tommy
Tommy

Reputation: 100632

Based on your comment, the problem is that there is no array in your NSUserDefaults named 'favorites' at any point. Probably you want to create one if it doesn't exist. So:

-(IBAction)addToFavorite:(id)sender {
    // get a mutable copy of the stored array, if there is one
    NSMutableArray* favoritedAlready = [[[NSUserDefaults standardUserDefaults] 
                     objectForKey:@"favorites"] mutableCopy];

    // if there wasn't a stored array then go ahead and create one to store
    if(!favoritedAlready)
        favoritedAlready = [NSMutableArray array];

    /* ... rest of stuff here ... */
    if (![favoritedAlready ...

Upvotes: 2

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