Databases
StackOverflow2013
Postsdbo
POObjective-c NSMutableArray of Objects retain
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POObjective-c NSMutableArray of Objects retain
    primarykey
    data
    text
    <p>I just can't get it! I have custom class "Word" also I generate NSMutableArray of Word-class-objects in few steps:</p> <ol> <li>words = [NSMutableArray array];</li> <li>for i = 0 to 8</li> <li>word = alloc+init;</li> <li>[words addObject: word];</li> <li>[word release];</li> </ol> <p>Then I pass words instance to setter of another class:</p> <pre><code>someInstance.words = words; </code></pre> <p>Where words is nonatomic, retain property. I declare setWords method like this:</p> <pre><code>-(void)setWords:(NSMutableArray *)w { [w retain]; [words release]; words = w; } </code></pre> <p>When words come to method as "w" variable it is an array of object but when I retain it and assign to my old value my words variable becomes an NSMUtableArray and it count is equal to w.count, but items of array 0x0. The "=" operator does not copy items of array, how can I fix it? Please help, I am a newbie in objective-c. I instanciate Word only with one method, shoud I implement parameterless init method?</p> <pre><code>-(id)initWithId:(int)Id Word:(NSString *)Word Card:(int)Card { self.id = Id; self.word = Word; self.card = Card; return self; } </code></pre> <p>The cycle where I generate my NSMutableArray:</p> <pre><code>Card *card = [[Card alloc] initWithId:[s intForColumn:@"id"] Type:[s intForColumn:@"type"] Used:[s intForColumn:@"used"]]; s = [db executeQueryWithFormat:@"SELECT w.id as id, word, card FROM word as w INNER JOIN card as c ON w.card=c.id WHERE c.id=%i ORDER BY w.id, RANDOM()", card.id]; while ([s next]) { Word *word = [[Word alloc] initWithId:[s intForColumn:@"id"] Word:[s stringForColumn:@"word"] Card:[s intForColumn:@"card"]]; [card.words addObject:word]; [word release]; } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USLuft-on
    1. USLuft-on
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COTo understand you can look at screenshot I was not able to insert it in the post because of small reputation: http://i.stack.imgur.com/UheIk.png
      singulars
      1. POObjective-c NSMutableArray of Objects retain
      1. USLuft-on
    2. COShow us your subclass init method.
      singulars
      1. POObjective-c NSMutableArray of Objects retain
      1. USRog
    3. COAnother idea is to use `words = [w mutableCopy]` in your setter method.
      singulars
      1. POObjective-c NSMutableArray of Objects retain
      1. USRog
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload