The HKDocument
class is a concrete subclass of the HKSample
class, used when creating queries for documents.
SDKs
- iOS 10.0+
- Mac Catalyst 13.0+
- watchOS 3.0+
Framework
- Health
Kit
Declaration
class HKDocumentType : HKSample Type
Overview
To create a document type instance, use the HKObject
class’s document
convenience method.
Subclassing Notes
Like many HealthKit classes, document types are not extensible and should not be subclassed.
Additionally, this class reuses the same instance whenever possible. Letting multiple queries share the same document type helps reduce the overall memory usage.