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POMemory leaks in UITableView with NSMutableArray - How to stop them?
 

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    <p>I'm pretty new to objective-c development and I'm to the point I'm beginning to test my application for leaks and patching up anything else I may have done wrong originally. I followed the examples from a book I bought and expanded on those ideas. The Leaks instrument is telling me in my tableView cellForRowAtIndexPath method I have a leak and I'm not sure on how to fix it. </p> <p>Here is the related .h contents:</p> <pre><code>@interface NewsListViewController : UITableViewController&lt;UIActionSheetDelegate&gt; { NSMutableArray *newsList, *account, *playerList;} </code></pre> <p>And here is the related .m contents:</p> <pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)ip { static NSString *CellIdentifier = @"NewsCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; [cell autorelease]; } NSManagedObject *uNews = [newsList objectAtIndex:[ip row]]; NSManagedObjectContext *playerDBContext = [[AppController sharedAppController] managedObjectContext]; NSFetchRequest *playerDBRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *playerDBEntity = [NSEntityDescription entityForName:@"Players" inManagedObjectContext:playerDBContext]; [playerDBRequest setEntity:playerDBEntity]; NSPredicate *playerDBPredicate = [NSPredicate predicateWithFormat:@"playerID=%@", [uNews valueForKey:@"playerID"]]; [playerDBRequest setPredicate:playerDBPredicate]; NSError *playerDBError; NSArray *playerDBList = [playerDBContext executeFetchRequest:playerDBRequest error:&amp;playerDBError]; [playerDBRequest release]; playerList = [playerDBList mutableCopy]; NSString *playerInformation; if (![playerDBList count] == 0) { NSManagedObject *playerInfo = [playerList objectAtIndex:0]; playerInformation = [NSString stringWithFormat:@"%@, %@ (%@-%@)", [playerInfo valueForKey:@"playerLastName"], [playerInfo valueForKey:@"playerFirstName"], [playerInfo valueForKey:@"team"], [playerInfo valueForKey:@"position"]]; } else { //NSInteger playerID = (NSInteger *)[uNews valueForKey:@"playerID"]; [self addPlayer:(NSInteger *)[uNews valueForKey:@"playerID"]]; NSLog(@"%@", [uNews valueForKey:@"playerID"]); playerInformation = [uNews valueForKey:@"playerInfo"]; } cell.textLabel.text = playerInformation; cell.detailTextLabel.text = [uNews valueForKey:@"news"]; cell.selectionStyle = UITableViewCellSelectionStyleGray; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; return cell;} </code></pre> <p>It's throwing the error on the playerList = [playerDBList mutableCopy]; line - Help with how to fix and an explanation would be greatly appreciated. It's probably from reallocating without releasing but when I've tried using [playerList release]; at the end of the cellForRowAtIndexPath my app crashes.</p>
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    1. USnlutterman
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    1. COWhat are the specific exceptions, crashes, and leaks?
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    2. COThe leaked object is listed as either _NSArrayM or Malloc 16 Bytes - in total there are 32 listed in Instruments all pointing to that line. Responsible Library is CoreData and Responsible Frame is -[_PFArray mutableCopyWithZone:]
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    3. COWhere/how do you release `playerList`?
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      1. POMemory leaks in UITableView with NSMutableArray - How to stop them?
      1. USDavid Gelhar
 

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