Combined Predicate: Workout type and Date.swift

// Construct startDate and endDate objects with NSDateComponents.
// See this article for more http://iaintheindie.com/2014/08/08/useful-nsdate-nscalendar-tricks/#StartEnd_of_the_Week

// For more examples of working with HealthKit see https://developer.apple.com/library/content/samplecode/Fit/Introduction/Intro.html

let workoutPredicate = NSPredicate(format: "(%K == %d) OR (%K == %d)",
		HKPredicateKeyPathWorkoutType,
		HKWorkoutActivityType.functionalStrengthTraining.rawValue,
		HKPredicateKeyPathWorkoutType,
		HKWorkoutActivityType.traditionalStrengthTraining.rawValue)

let timePredicate = HKQuery.predicateForSamples(withStart: startDate, end: endDate, options: [])

let combinedPredicate = NSCompoundPredicate.init(andPredicateWithSubpredicates: [workoutPredicate, timePredicate])

let query = HKSampleQuery(sampleType: HKSampleType.workoutType(), predicate: combinedPredicate, limit: limitless, sortDescriptors: nil) {…}