Type Alias

HKCorrelationTypeIdentifier

Used to define the identifiers that create correlation type objects.

Declaration

typedef NSString *HKCorrelationTypeIdentifier;

Discussion

To create an HKCorrelationType instance, pass an HKCorrelationTypeIdentifier value to the correlationTypeForIdentifier: method.

For the complete list of quantity type identifiers, see Correlation Types.

Topics

Correlation Types

HKCorrelationTypeIdentifierBloodPressure

Blood pressure correlation types combine a systolic sample and a diastolic sample into a single blood pressure reading.

HKCorrelationTypeIdentifierFood

Food correlation types combine any number of nutritional samples into a single food object.

See Also

Creating Correlation Types

+ correlationTypeForIdentifier:

Returns the shared correlation type for the provided identifier.