sumQuantity(for:)
Returns the sum of all the samples that match the query and that were created by the specified source.
Declaration
func sumQuantity(for source: HKSource) -> HKQuantity?Parameters
- source:
A data source from the statistics object’s Sources array.
Return Value
If both the cumulativeSum option and the separateBySource option were set, this method returns a quantity object. This object contains the sum of all the samples that match the query and were created by the specified source. If the statistics options were not both set, this method returns nil.