removeObjectAtIndex crashing the app - objective-c

Question

In the .h file I have set the below line.
NSMutableArray *repArray;
In the .m file I have placed the below lines.(I put just the required lines of code for this ex)
-(void)read_data_fromDB
{
objectsForCharacters = [[NSMutableDictionary alloc]init];
sqlite3 *db = [contactAppDelegate getNewDBConnection];
NSMutableString *query = nil;
query = [NSMutableString stringWithFormat:#"select representative, title, business_name, uid from corporate where profiler_type <> 'OWN_CORPORATE' order by representative asc"];
const char *sql = [query UTF8String];
sqlite3_stmt *selectAllStmt = nil;
if(sqlite3_prepare_v2(db,sql, -1, &selectAllStmt, NULL)!= SQLITE_OK)
NSAssert1(0,#"error preparing statement",sqlite3_errmsg(db));
else
{
repArray = [[NSMutableArray alloc]init];
businessArray = [[NSMutableArray alloc]init];
titleArray = [[NSMutableArray alloc]init];
uidArray = [[NSMutableArray alloc]init];
while(sqlite3_step(selectAllStmt)==SQLITE_ROW)
{
char *chrstr =(char *)sqlite3_column_text(selectAllStmt, 0);
if(chrstr !=NULL)
{
corpRepresentative = [NSString stringWithUTF8String:chrstr];
[repArray addObject:corpRepresentative];
}
chrstr =(char *)sqlite3_column_text(selectAllStmt, 1);
if(chrstr !=NULL)
{
corpTitle = [NSString stringWithUTF8String:chrstr];
[titleArray addObject:corpTitle];
}
chrstr =(char *)sqlite3_column_text(selectAllStmt, 2);
if(chrstr !=NULL)
{
corpBusiness_name = [NSString stringWithUTF8String:chrstr];
[businessArray addObject:corpBusiness_name];
}
chrstr =(char *)sqlite3_column_text(selectAllStmt, 3);
if(chrstr !=NULL)
{
corporteUid = [NSString stringWithUTF8String:chrstr];
[uidArray addObject:corporteUid];
}
}
}
sqlite3_finalize(selectAllStmt);
sqlite3_close(db);
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
UILongPressGestureRecognizer *longPressGesture =
[[[UILongPressGestureRecognizer alloc]
initWithTarget:self action:#selector(longPress:)] autorelease];
[cell addGestureRecognizer:longPressGesture];
}
// Configure the cell...
UILabel *txtLbl = [[UILabel alloc]initWithFrame:CGRectMake(70, 0, 175, 26)];
//[txtLbl setBackgroundColor:[UIColor greenColor]];
[txtLbl setTextAlignment:UITextAlignmentLeft];
NSString *txtStr = [repArray objectAtIndex:indexPath.row];
UIFont *fontTxtLbl = [UIFont fontWithName: #"FuturaMdBT" size:16];
[txtLbl setFont:fontTxtLbl];
[txtLbl setText:txtStr];
[cell.contentView addSubview:txtLbl];
[txtLbl release];
UILabel *txtDetailLbl = [[UILabel alloc]initWithFrame:CGRectMake(70, 27, 175, 20)];
// [txtDetailLbl setBackgroundColor:[UIColor redColor]];
[txtDetailLbl setTextAlignment:UITextAlignmentLeft];
NSString *txtDetailStr = [titleArray objectAtIndex:indexPath.row];
UIFont *fontTxtDetailLbl = [UIFont fontWithName: #"Arial" size:12];
[txtDetailLbl setFont:fontTxtDetailLbl];
[txtDetailLbl setText:txtDetailStr];
[cell.contentView addSubview:txtDetailLbl];
[txtDetailLbl release];
UILabel *txtDetailLbl1 = [[UILabel alloc]initWithFrame:CGRectMake(70, 47, 175, 20)];
//[txtDetailLbl1 setBackgroundColor:[UIColor blueColor]];
[txtDetailLbl1 setTextAlignment:UITextAlignmentLeft];
NSString *txtDetailStr1 = [businessArray objectAtIndex:indexPath.row];
UIFont *fontTxtDetailLbl1 = [UIFont fontWithName: #"Arial" size:12];
[txtDetailLbl1 setFont:fontTxtDetailLbl1];
[txtDetailLbl1 setText:txtDetailStr1];
[cell.contentView addSubview:txtDetailLbl1];
[txtDetailLbl1 release];
// cell.textLabel.text = [repArray objectAtIndex:indexPath.row];
//cell.detailTextLabel.text = [titleArray objectAtIndex:indexPath.row];
cell.imageView.image=[imagearray objectAtIndex:indexPath.row];
UIView *viewSelected = [[[UIView alloc] init] autorelease];
viewSelected.backgroundColor = [UIColor colorWithRed:224.0/255.0
green:229.0/255.0
blue:241.0/255.0
alpha:1.0];
cell.selectedBackgroundView = viewSelected;
cell.textLabel.highlightedTextColor=[UIColor colorWithRed:46.0/255.0
green:77.0/255.0
blue:141.0/255.0
alpha:1.0];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *tempUID = [uidArray objectAtIndex:indexPath.row];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setObject:tempUCID forKey:#"corpUcid"];
[prefs setObject:#"PROFILER" forKey:#"selProfiler"];
CorpPrevFront *corpPrevFront = [[CorpPrevFront alloc]initWithNibName:#"CorpPrevFront" bundle:nil];
[self.navigationController pushViewController:corpPrevFront animated:NO];
[corpPrevFront release];
[tableView deselectRowAtIndexPath:indexPath animated:NO];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
//FOR VIEW
if (buttonIndex == 1 && [alertView tag] == 1) {
// IT WILL BE MATCH ON CorpPrevFront CLASS
}
//FOR DELETE
if(buttonIndex == 2 && [alertView tag] == 1){
} else if(buttonIndex == 1 && [alertView tag] == 2){
DeleteProfiler *delProfiler = [[DeleteProfiler alloc]init];
BOOL del = [delProfiler deleteProfiler:selectedCpUid];
//[delProfiler deleteProfiler:selectedCpUcid];
if (del == YES) {
[repArray removeObjectAtIndex:selectedIndexPath.section];
[businessArray removeObjectAtIndex:selectedIndexPath.row];
[titleArray removeObjectAtIndex:selectedIndexPath.row];
[ucidArray removeObjectAtIndex:selectedIndexPath.row];
[self.corporateTable reloadData];
}
}
}
I am trying to delete an array element from a method. If I execute the below line then the app crashes automatically in my iPod Touch. But it works fine in simulator without any errors.
[repArray removeObjectAtIndex:selectedIndexPath.row];
or
[repArray removeObjectAtIndex:0];
both crashes the app even if I have more than one elements in array.

Answer 1

When you app crashes like that, 99% of the time you are trying to remove an object beyond the bounds of array.