HealthKit iOS 12.1 to 12.2 API Differences
HKMetadata.h
Added
HKMetadataKeyHeartRateEventThreshold
HKTypeIdentifiers.h
Added
HKCategoryTypeIdentifierHighHeartRateEvent
Added
HKCategoryTypeIdentifierLowHeartRateEvent
Added
HKCategoryTypeIdentifierIrregularHeartRhythmEvent