heartbeatSeries(_:)
Returns a sample predicate that matches heartbeat series samples.
Declaration
static func heartbeatSeries(_ predicate: NSPredicate? = nil) -> HKSamplePredicate<HKHeartbeatSeriesSample>Parameters
- predicate:
An optional predicate that further restricts the results that the query returns.
Discussion
Use this method to create an HKSamplePredicate instance that you can use to query for HKHeartbeatSeriesSample objects.