---
title: HKBloodType
framework: healthkit
role: symbol
role_heading: Enumeration
path: healthkit/hkbloodtype
---

# HKBloodType

Constants indicating the user’s blood type.

## Declaration

```swift
enum HKBloodType
```

## Topics

### Constants

- [HKBloodType.notSet](healthkit/hkbloodtype/notset.md)
- [HKBloodType.aPositive](healthkit/hkbloodtype/apositive.md)
- [HKBloodType.aNegative](healthkit/hkbloodtype/anegative.md)
- [HKBloodType.bPositive](healthkit/hkbloodtype/bpositive.md)
- [HKBloodType.bNegative](healthkit/hkbloodtype/bnegative.md)
- [HKBloodType.abPositive](healthkit/hkbloodtype/abpositive.md)
- [HKBloodType.abNegative](healthkit/hkbloodtype/abnegative.md)
- [HKBloodType.oPositive](healthkit/hkbloodtype/opositive.md)
- [HKBloodType.oNegative](healthkit/hkbloodtype/onegative.md)

### Initializers

- [init(rawValue:)](healthkit/hkbloodtype/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Enumerations

- [HKAudiogramConductionType](healthkit/hkaudiogramconductiontype.md)
- [HKAudiogramSensitivityTestSide](healthkit/hkaudiogramsensitivitytestside.md)
- [HKCategoryValueVaginalBleeding](healthkit/hkcategoryvaluevaginalbleeding.md)
- [HKGAD7Assessment.Answer](healthkit/hkgad7assessment/answer.md)
- [HKGAD7Assessment.Risk](healthkit/hkgad7assessment/risk-swift.enum.md)
- [HKPHQ9Assessment.Answer](healthkit/hkphq9assessment/answer.md)
- [HKPHQ9Assessment.Risk](healthkit/hkphq9assessment/risk-swift.enum.md)
- [HKStateOfMind.Association](healthkit/hkstateofmind/association.md)
- [HKStateOfMind.Kind](healthkit/hkstateofmind/kind-swift.enum.md)
- [HKStateOfMind.Label](healthkit/hkstateofmind/label.md)
- [HKStateOfMind.ValenceClassification](healthkit/hkstateofmind/valenceclassification-swift.enum.md)
- [HKWorkoutEffortRelationshipQueryOptions](healthkit/hkworkouteffortrelationshipqueryoptions.md)
- [HKBiologicalSex](healthkit/hkbiologicalsex.md)
- [HKFitzpatrickSkinType](healthkit/hkfitzpatrickskintype.md)
- [HKWheelchairUse](healthkit/hkwheelchairuse.md)