init(sampleType:predicate:)
Creates a new descriptor for the data type and predicate you provided.
Declaration
init(sampleType: HKSampleType, predicate: NSPredicate?)Parameters
- sampleType:
The data type of samples that match this descriptor. For more information, see Data Types.
- predicate:
The predicate used to filter samples that match this descriptor. If the predicate is
nil, the descriptor matches all samples of the specified data type.