Core Data, Fetch only 15 rows, and then the next 15 fetched on event trigger

Question

I have pagination implemented in the backend, and i get the cells from the server.

The data is divided into batches, and i have to check, if the batch already exists in the database, i dont have to fetch that from the server.

To make that work , i need to just fetch first 15 rows, and then get the next 15 on event trigger.

is there any way to do so?

[fetchRequest setFetchBatchSize:15];

The above keeps fetching automatically as we scroll.

Answer 1

start with setting the request's fetch offset to 0 with a fetchLimit to 15 and just add 15 to the fetchOffset each time... Hope this helps

// first fetch
request.fetchOffset = 0;
request.fetchLimit = 15;

// second fetch
request.fetchOffset = 15;
request.fetchLimit = 15;

// third fetch
request.fetchOffset = 30;
request.fetchLimit = 15;