CODEWITHSUNDEEP
iphonecocoacore-datansmanagedobjectcontext
Luuk D. Jansen
Luuk D. Jansen

Reputation: 4508

Core Data crash on a seemingly normal NSString field

I have another strange bug which I cannot figure out.

I try to create a tableviewcell with the code below:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    TableViewCellController *cell = (TableViewCellController *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        [[NSBundle mainBundle] loadNibNamed:@"TableViewCell" owner:self options:nil];
        cell = [_cell autorelease];
        _cell = nil;
    } 

    // Configure the cell... 

 int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
 Article *article = (Article *)[articles objectAtIndex: storyIndex];
 cell.titleLabel.text = article.title;
 cell.siteLabel.text = article.site.name;

 cell.summaryLabel.text = article.description;

 [article release];

    return cell;
}

The problem is that I can populate the labels with any value, except with the description value. As soon as I do that I get a the following crash:

2010-12-22 16:07:13.165 iDoms[24086:207] CoreData: annotation: fault fulfilled from database for : 0x8b16dd0 Program received signal: “EXC_BAD_ACCESS”. warning: Unable to restore previously selected frame. Data Formatters temporarily unavailable, will re-try after a 'continue'. (Not safe to call dlopen at this time.)

with 62820 line items on the stack. I have no idea where to start figuring this out. I am used to Java, and Objective-C has been a real nightmare so-far regarding little strange bugs.

The Article class looks like this:

//  Article.h

#import <CoreData/CoreData.h>

@class Site;

@interface Article :  NSManagedObject  
{

}

@property (nonatomic, retain) NSNumber * id;
@property (nonatomic, retain) NSString * title;
@property (nonatomic, retain) NSNumber * read;
@property (nonatomic, retain) NSString * link;
@property (nonatomic, retain) NSDate * pubDate;
@property (nonatomic, retain) NSString * description;
@property (nonatomic, retain) NSDate * lastUpdate;
@property (nonatomic, retain) Site * site;


@end

and

//  Article.m

#import "Article.h"

@implementation Article 

@dynamic id;
@dynamic title;
@dynamic read;
@dynamic link;
@dynamic pubDate;
@dynamic description;
@dynamic lastUpdate;
@dynamic site;

@end

The database contains data, and the particular field just the string "Test1". Any help is really appreciated as always!

Upvotes: 1

Views: 603

Answers (2)

BP.
BP.

Reputation: 10083

I do not know if this is related to your current issue, but you do not want to do the [article release]; in your cellForRowAtIndexPath method, as objectAtIndex does not give you a reference that needs to be released.

Upvotes: 2

Jack Cox
Jack Cox

Reputation: 3300

The size of the stack trace leads me to believe that you've got an infinite recursion loop going somewhere.

I would look at the construction of the custom UITableViewCell that is getting created, namely the summaryLabel control and how it is wired into the cell.

I would also make sure that the articles array is property retained.

Upvotes: 3

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