# predicateForObjects(with:) Returns a predicate that matches the objects with the specified universally unique identifiers (UUIDs). ``` class func predicateForObjects(with UUIDs: Set) -> NSPredicate ``` ## Parameters `UUIDs` The set of UUIDs to be matched. ## Return Value A predicate that matches the specified objects based on their UUIDs. ## Discussion HealthKit assigns a UUID to each object when it is saved to the HealthKit store. HealthKit uses these IDs to uniquely identify objects from the store. Use this convenience method to create a predicate that checks an object’s UUID against the provided set of UUIDs. The following sample uses both the convenience method and a predicate format string to create equivalent predicates. ```swift let uuids = HKQuery.predicateForObjectsWithUUIDs(myUUIDs) let explicitUUIDs = NSPredicate(format: "%K IN %@", HKPredicateKeyPathUUID, myUUIDs) ``` ## See Also [`HKPredicateKeyPathUUID`](/documentation/HealthKit/HKPredicateKeyPathUUID) The key path for accessing the object’s UUID inside a predicate format string. [`UUID`](/documentation/HealthKit/HKObject/uuid) The universally unique identifier (UUID) for this HealthKit object. --- 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)