Type Method

predicateForObjects(with:)

Returns a predicate that matches the objects with the specified universally unique identifiers (UUIDs).

Declaration

class func predicateForObjects(with UUIDs: Set<UUID>) -> 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.

let uuids = HKQuery.predicateForObjectsWithUUIDs(myUUIDs)
 
let explicitUUIDs =
    NSPredicate(format: "%K IN %@", HKPredicateKeyPathUUID, myUUIDs)

See Also

Creating Object Predicates

class func predicateForObject(with: UUID) -> NSPredicate

Returns a predicate that matches an object with the specified universally unique identifier (UUID).

class func predicateForObjects(from: HKSource) -> NSPredicate

Returns a predicate that matches all the objects that were created by the provided source.

class func predicateForObjects(from: Set<HKSource>) -> NSPredicate

Returns a predicate that matches all the objects that were created by any of the provided sources.

class func predicateForObjects(from: Set<HKDevice>) -> NSPredicate

Returns a predicate that matches all the objects that were created by any of the provided devices.

class func predicateForObjects(withDeviceProperty: String, allowedValues: Set<String>) -> NSPredicate

Returns a predicate that matches all objects created by devices with the specified properties.

class func predicateForObjects(from: Set<HKSourceRevision>) -> NSPredicate

Returns a predicate that matches all the objects that were created by any of the provided source revisions.

class func predicateForObjects(withMetadataKey: String) -> NSPredicate

Returns a predicate that matches any object whose metadata contains the provided key.

class func predicateForObjects(withMetadataKey: String, allowedValues: [Any]) -> NSPredicate

Returns a predicate that matches objects based on the provided metadata key and an array of target values.

class func predicateForObjects(withMetadataKey: String, operatorType: NSComparisonPredicate.Operator, value: Any) -> NSPredicate

Returns a predicate that matches objects based on the provided metadata key, value, and operator.

class func predicateForObjectsWithNoCorrelation() -> NSPredicate

Returns a predicate that matches all objects that are not associated with a HealthKit correlation.