Error in getting the title for section - iphone

Question

I am creating an expense tracker kind of application.
My requirement is to get the date in the section header and the expenses added on that date in the table View. I tried the following code but its not working.
-(IBAction)bydate:(id)sender
{
[self.byDateArray removeAllObjects];
[self.byDateCountArray removeAllObjects];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
for(NSManagedObject *info in self.listOfExpenses){
NSString *compareDates = [dateFormatter stringFromDate:[info valueForKey:#"date"]];
BOOL isAvail = NO;
for (int i = 0; i<[self.byDateArray count]; i++){
if([compareDates isEqualToString:[self.byDateArray objectAtIndex:i]])
{
isAvail = YES;
}
}
if(!isAvail)
[self.byDateArray addObject:compareDates];
}
int count = 0;
for (int i = 0 ; i < [self.byDateArray count] ; i ++){
NSString *compareDates = [self.byDateArray objectAtIndex:i];
for(NSManagedObject *info in self.listOfExpenses){
if([compareDates isEqualToString:[dateFormatter stringFromDate:[info valueForKey:#"date"]]])
{
count++;
}
}
[self.byDateCountArray addObject:[NSNumber numberWithInt:count]];
count = 0;
}
self.byDateTab.hidden = NO;
self.byDateTab.frame = CGRectMake(0, 123, 320, 244);
[self.view addSubview:self.byDateTab];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if(tableView == self.byDateTab)
return [self.byDateArray count
return 3;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
int rows;
if(tableView == self.byDateTab)
rows = [[self.byDateCountArray objectAtIndex:section] intValue];
return rows;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"CellIdentifier"]autorelease];
if (tableView == self.byDateTab)
{
for(int i = 0; i < [self.byDateCountArray count];i++)
{
if(indexPath.section == 0)
{
NSManagedObject *records = nil;
records = [self.listOfExpenses objectAtIndex:indexPath.row];
self.firstLabel.text = [records valueForKey:#"category"];
self.secondLabel.text = [records valueForKey:#"details"];
NSString *amountString = [NSString stringWithFormat:#"%#",[records valueForKey:#"amount"]];
self.thirdLabel.text = amountString;
}
else if (indexPath.section == i)
{
int rowCount = 0;
for(int j=0; j<indexPath.section; j++)
{
rowCount = rowCount + [[self.byDateCountArray objectAtIndex:j]intValue];
}
NSManagedObject *records = nil;
records = [self.listOfExpenses objectAtIndex:(indexPath.row + rowCount) ];
self.firstLabel.text = [records valueForKey:#"category"];
self.secondLabel.text = [records valueForKey:#"details"];
NSString *amountString = [NSString stringWithFormat:#"%#",[records valueForKey:#"amount"]];
self.thirdLabel.text = amountString;
}
}
}
But am getting the SIGABRT error in this line
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return [self.byDateArray objectAtIndex:section];
}
I am getting the following error in the NSlog
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSCFArray objectAtIndex:]: index 2 beyond bounds for empty array'

Answer 1

the problem is here
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if(tableView == self.byDateTab)
return [self.byDateArray count];
//why crashed at index 2, because here is 3
return 3;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return [self.byDateArray objectAtIndex:section];
}
it crash at another tableview that not "self.byDateTab"
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
if(tableView == self.byDateTab)
{
return [self.byDateArray objectAtIndex:section];
}
else
{
//you should deal with other tableview
// it crashed here
}
}
or just disable other tableview's section header
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if(tableView == self.byDateTab)
return [self.byDateArray count];
//i don't see other tableviews how to work, so if you do this, the code will work
//then you should look back to the solution above
return 0;
}

Answer 2

According to the error your self.byDateArray does not have any object at index 2 , so please check the contents of your array.

Answer 3

Your byDateArray seems to be empty.
What are doing with [self.byDateArray removeAllObjects];?

Answer 4

As mentioned above, the problem is in adding objects to you self.byDateArray
Maybe self.byDateArray is not initialized?
Please, make NSLog(#"self.byDateArray: %#",self.byDateArray) just before [self.byDateArray removeAllObjects]; in your -(IBAction)bydate:(id)sender method.

Answer 5

This is means a
section
value is bigger than
self.byDateArray
count.
Try add this in 1st code line:
NSLog(#" %# ", self.byDateArray);
in -(NSString *)tableView: function for see a content of array.