A type that identifies samples that store numerical values.
SDKs
Framework
class HKQuantityType : HKSampleThe HKQuantity class is a concrete subclass of the HKObject class. To create a quantity type instance, use the object type’s quantity convenience method.
Use quantity types to:
Request permission to read or write matching quantity samples.
Create and share matching quantity samples.
Query for matching quantity samples.
var aggregationThe aggregation style for the given quantity type.
enum HKQuantityConstant values that describe how quantities can be aggregated over time.
func `is`(compatibleReturns a Boolean value that indicates whether the quantity type is compatible with the given unit.
class HKCharacteristicA type that represents data that does not typically change over time.
class HKCategoryA type that identifies samples that contain a value from a small set of possible values.
class HKCorrelationA type that identifies samples that group multiple subsamples.
class HKActivityA type that identifies activity summary objects.
class HKSeriesA type that indicates the data stored in a series sample.
class HKObjectThe abstract superclass for all classes that identify a specific type of data when working with the HealthKit store.
class HKSampleAn abstract superclass for all classes that identify a specific type of sample when working with the HealthKit store.
class HKClinicalA type that identifies samples that contain clinical record data.
class HKWorkoutA type that identifies samples that store information about a workout.