electrocardiogram(_:)
Returns a sample predicate that matches electrocardiogram samples.
Declaration
static func electrocardiogram(_ predicate: NSPredicate? = nil) -> HKSamplePredicate<HKElectrocardiogram>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 HKElectrocardiogram objects.