An abstract base class that defines samples that contain a series of items.
- iOS 11.0+
- watchOS 4.0+
HKSeries objects directly. Instead, user one of the concrete subclasses (for example, the
Like many HealthKit classes, the
HKSeries class should not be subclassed. You can extend
HKSeries and its subclasses by adding custom metadata keys and values to the metadata dictionary when the object is created.