How to sort and limit with NSPredicate in CoreData?

Question

I want to fetch five records saved in Core Data and sorted by a Date type attribute named "recordingTime". For example, In MySql, we can simply add limit = 5 to set a limit. So, how to sort and limit with NSPredicate? Thanks.

Answer 1

You can use sortDescriptors and fetchLimit property of NSFetchRequest for that.

Objective C:

//Set sort
NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"recordingTime" ascending:YES];
[request setSortDescriptors: @[sort]];
[request setFetchLimit:5];

Swift:

let sort = NSSortDescriptor(key: "recordingTime", ascending: true)
request.sortDescriptors = [sort]
request.fetchLimit = 5