How to create an array of arrays in UITableviews - ios

Question

I have two tableViewControllers, my first tableView contains a list of items called folders, on click of which I will open the another tableView called ItemsInfolder and display if they are present or else it will empty.
So for this I know that ItemsInFolder View should be an array of arrays, with each array at index position (row position) , but I am confused, on how to do it , how to call array present at each index on click of each folder.
updated according to comments below
//FolderTableView
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
ItemsTableViewController *selectedFolder = [[ItemsTableViewController alloc] initWithNibName:#"ItemsTableViewController" bundle:nil];
selectedFolder.selectedfolder = [indexPath row];
[self.navigationController pushViewController:selectedFolder animated:YES];
}
//ItemsTableView
-(void)xyz operation
{
[m_ItemArray addObject:item];
[appDelegate.2dArray addObject: m_ItemArray];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [[appDelegate.2dArray objectAtIndex:m_selectedfolder]count];(selected folder index coming from, folderTable)
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSMutableArray *testArray = [appDelegate.2dArray objectAtIndex:[indexPath row]];
tableCell.items.text = [testArray objectAtIndex:[indexPath row]];
return tableCell;
}
So friends, please help me out.
Regards
Ranjit

Answer 1

Considered a arrayOfFolders global and initialized, full of arrays containing your files, following this hierarchy :
arrayOfFolders :
{
[0] //Folder 0 (NSArray)
{
file1
file2
file3
}
[1] //Folder 1 (NSArray)
{
file4
file5
}
}
When you'll click on your folder inside your tableView, get the child array like that :
-(void)didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//To retrieve your array within your array at the seleted index
NSArray * arrayOfItemsInFolder = [[NSArray alloc] initWithArray:[self.arrayOfFolders objectAtIndexPath:indexPath.row] copyItems:YES];
//Do your stuff
}
Does this seems right to you?