predicateForQuantitySamples(with:quantity:)
Returns a predicate that matches samples based on the target quantity.
Declaration
class func predicateForQuantitySamples(with operatorType: NSComparisonPredicate.Operator, quantity: HKQuantity) -> NSPredicateParameters
- operatorType:
The operator type to use when comparing the sample’s quantity to the target quantity.
- quantity:
The target quantity object.
Return Value
A predicate that matches samples based on the target quantity. This predicate works only on quantity samples.
Discussion
Use this convenience method to create a predicate that matches against a sample’s quantity. The following sample uses both the convenience method and a predicate format string to create equivalent predicates.