NEW: Learn to build the incredible iOS 15 Weather app today! >>

How to limit the number of items in a fetch request

Paul Hudson    @twostraws   

Updated for Xcode 13.2

SwiftUI’s @FetchRequest property wrapper is great for making simple requests for objects, providing both sorting and filtering. But if you want to adjust the number of items you get back – perhaps to say “show me the first 10 items in my results” – then you need to do a little more work yourself.

First, create your @FetchRequest property without an initial value. For example, if we wanted to work with a “ProgrammingLanguage” entity we might use this:

@FetchRequest var languages: FetchedResults<ProgrammingLanguage>

And now create a custom initializer for your view that uses NSFetchRequest to build the exact request you want. Once you’re ready, you can put that into a regular FetchRequest and assign it directly to your property.

For example, if we wanted to read the first 10 programming languages without any sorting or filtering, we would use this:

init() {
    let request: NSFetchRequest<ProgrammingLanguage> = ProgrammingLanguage.fetchRequest()
    request.fetchLimit = 10

    _languages = FetchRequest(fetchRequest: request)

Or if we wanted to have filtering, sorting, and row limiting we can do that too:

init() {
    let request: NSFetchRequest<ProgrammingLanguage> = ProgrammingLanguage.fetchRequest()
    request.predicate = NSPredicate(format: "active = true")

    request.sortDescriptors = [
        NSSortDescriptor(keyPath: \, ascending: true)

    request.fetchLimit = 10
    _languages = FetchRequest(fetchRequest: request)
Hacking with Swift is sponsored by Sentry

SPONSORED With Sentry’s error and performance monitoring for iOS, you see mobile vitals that actually matter, can solve any latency issues quickly, and learn how each release is performing over time.

Learn More

Sponsor Hacking with Swift and reach the world's largest Swift community!

Similar solutions…

Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 3.8/5

Unknown user

You are not logged in

Log in or create account

Link copied to your pasteboard.