Question

I have a NSMutableDictionary as the datasource for my UITableView. I am trying to implement the delete mode and having an issue.

I am logging the key I am trying to remove as well as the object that it corresponds to as this issue seems like it might be related to my trying to access unallocated memory or something. Here is my implementation of tableView:commitEditionStyle:forRowAtIndexPath:

    - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source.
        NSArray * keys = [userList allKeys];
        NSNumber *keyToRemove = [keys objectAtIndex:indexPath.row];
        NSLog(@"Key to remove: %@",keyToRemove);
        NSLog(@"Object at key: %@",[userList objectForKey:keyToRemove]);
           [userList removeObjectForKey:keyToRemove];   
              [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
        [keys release];
        [keyToRemove release];

    }   
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
    }   
}

This method runs and then I get the error. The two NSLog statements output the correct key and it’s corresponding value.

Can someone tell me what I’m doing wrong?

Thanks

Answer 1

You don’t own keys or keysToRemove, so you should not be releasing them. I strongly suggest reading up on the Cocoa memory management rules.