Limit NSFetchedResultsController results, and get more...

Question

HI All,

I currently have an NSFetchedResultsController setup to return all rows in a table in my core data database. This then fills up my UITableView. The trouble is this will quickly get out of hand as the rows grow in number.

How can I limit the initial query to say 20 results, then add a button somewhere to "Get More" from where we left off?

Thanks for any guidance as always

Answer 1

This is controlled with NSFetchRequest's -setFetchLimit: and -setFetchOffSet.

If I recall correctly, the drawback with NSFetchedResultsController is that you can't modify the fetch request after you create your NSFetchedResultsController instance. I believe this means you'll have to create a new one (instance w/new fetch request) each time you change the range you want to retrieve/display.

File an enhancement request with Apple at bugreporter.apple.com if you feel this shouldn't be the case.