identifier
A unique string identifying the HealthKit object type.
Declaration
var identifier: String { get }Discussion
Each object type has a unique identifier. The identifiers can be grouped into different categories: HKQuantityTypeIdentifier, HKCategoryTypeIdentifier, HKCharacteristicTypeIdentifier, HKCorrelationTypeIdentifier, and HKDocumentTypeIdentifier Each group of identifiers is associated with a different concrete subclass of HKObjectType.