iOS: Core data asynchronous data fetching and saving in chunks

Question

Is there an API to fetch data in chunks from DB and display (like a progress) in UI. Vice-vera , can we do the same for saving ?

Answer 1

After reading some articles on Core Data API, i am able to achieve an asynchronous fetching behavior.

@Adam Fallon, you were correct when you said the without knowing the size of the content to be fetched, we cannot define the progress. But for fetching file size , we can simply call:

managedObjectContext.count(for: fetch).

And for incremental fetching, we can use NSAsynchronousFetchRequest API.

Sample Code: Core-Data-Asynchronous-Fetching

Blog link: Core-Data-Asynchronous-Fetching

Video Link: Core-Data-Asynchronous-Fetching

Will be exploring more for incremental saving.