tableView sections with data from a single array object

[raheel]

Hi guys,

I've got a situation, where i have to add sections to a tableview.
An NSMutableArray is having objects with anNSInteger Type and NSString title.

ExOb *eob = (ExOb *)[appDelegate.ExArray objectAtIndex:indexPath.row];

want i want to do is,
if (eob.Type == 1){
//add to indexpath.section 1
} else if (eob.Type == 2){
//add to section 2
}
else if (eob.Type == 1){
//add to section 3
}

however, i can actually implement this cuz i simply dont kno how to.
and also, to return the exact number of rows where eob.type==1.. etc

Most examples have arrays for each sections.

any suggestions would be great

[BrianSlick]

There is a reason most examples do that. Is there a reason that you can't?

[raheel]

no reason actually. I'd hav to initialise about 4 arrays in viewdidload, add them to dictionary. and then add all those to a single array.

I was just thinking if theres an easier way, the data is huge, many cells. I was looking for a memory saving way out

[BrianSlick]

You'd have the same amount of data either way, right? The memory for the containers themselves would be relatively small.

I guess it depends on how you define "easier". I personally keep a master list of data, and then have a sorting routine that breaks it down into smaller parts. My table view methods only care about the smaller parts; they don't care how the data was sorted.

Here is something that should help:
Clinging To Ideas: Taming Table Views

After I wrote that, I learned that CoreData has a NSFetchedResultsSectionInfo class which is basically the same thing, so I think I'm on the right track.

And you only "need" 2 arrays: master and sorted.

[deannerene]

Originally Posted by raheel

Hi guys,

I've got a situation, where i have to add sections to a tableview.
An NSMutableArray is having objects with anNSInteger Type and NSString title.

ExOb *eob = (ExOb *)[appDelegate.ExArray objectAtIndex:indexPath.row];

want i want to do is,
if (eob.Type == 1){
//add to indexpath.section 1
} else if (eob.Type == 2){
//add to section 2
}
else if (eob.Type == 1){
//add to section 3
}

however, i can actually implement this cuz i simply dont kno how to.
and also, to return the exact number of rows where eob.type==1.. etc

Most examples have arrays for each sections.

any suggestions would be great

I had done something similar before and a quick test shows that it should work for you.

In the :

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

you need to create a new index like this:

int matchingIndex = ((indexPath.section *2)+ indexPath.row);

This tracks with a group of 2 rows per section. If your sections have a different number of rows then adjust the multiplier for that.

Of course if your sections have varying row counts the math doesn't work. It worked for me.

Deanne