# quantitySample(type:predicate:) Returns a sample predicate that matches quantity samples. ``` static func quantitySample(type quantityType: HKQuantityType, predicate: NSPredicate? = nil) -> HKSamplePredicate ``` ## Parameters `quantityType` A type that matches samples that store numerical values. `predicate` An optional predicate that further restricts the results that the query returns. ## Discussion Use this method to create an [`HKSamplePredicate`](/documentation/HealthKit/HKSamplePredicate) instance that you can use to query for [`HKQuantitySample`](/documentation/HealthKit/HKQuantitySample) objects. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)