每小时Healthkit活动摘要包含步数，距离和卡路里？

Question

查询Healthkit应该返回一个包含步数，距离和卡路里的数组对象。

我能够通过
分别归还它们 活动步骤/小时

func activitySteps(_ startDate:NSDate, endDate:NSDate, anchorDate:NSDate, completion: @escaping (Array<NSObject>, NSError?) -> ()) {
    let type = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)
    let interval = NSDateComponents()
    interval.hour = 1

    let predicate = HKQuery.predicateForSamples(withStart: startDate as Date, end: endDate as Date, options: .strictEndDate)
    let query = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: predicate, options: [.cumulativeSum], anchorDate: anchorDate as Date, intervalComponents:interval as DateComponents)

    query.initialResultsHandler = { query, results, error in
      if let myResults = results{
        var stepsArray: [NSObject] = []
        myResults.enumerateStatistics(from: startDate as Date, to: endDate as Date) {
          statistics, stop in

          if let quantity = statistics.sumQuantity() {
            let steps = quantity.doubleValue(for: HKUnit.count())
//            print("\(statistics.endDate.timeIntervalSince1970): steps = \(steps)")

            let ret =  [
              "steps": steps,
              "startDate" : statistics.startDate.timeIntervalSince1970 * 1000.0,
              "endDate": statistics.endDate.timeIntervalSince1970 * 1000.0
              ] as [String : Any]
            stepsArray.append(ret as NSObject)
          }
        }
        completion(stepsArray, error as NSError?)
      }
    }

    healthKitStore.execute(query)
  }

活动距离/小时

func activityDistance(_ startDate:NSDate, endDate:NSDate, anchorDate:NSDate, completion: @escaping (Array<NSObject>, NSError?) -> ()) {
    let type = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.distanceWalkingRunning)
    let interval = NSDateComponents()
    interval.hour = 1

    let predicate = HKQuery.predicateForSamples(withStart: startDate as Date, end: endDate as Date, options: .strictEndDate)
    let query = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: predicate, options: [.cumulativeSum], anchorDate: anchorDate as Date, intervalComponents:interval as DateComponents)

    query.initialResultsHandler = { query, results, error in
      if let myResults = results{
        var distanceArray: [NSObject] = []
        myResults.enumerateStatistics(from: startDate as Date, to: endDate as Date) {
          statistics, stop in

          if let quantity = statistics.sumQuantity() {
            let distance = quantity.doubleValue(for: HKUnit.meter())
            print("\(statistics.endDate.timeIntervalSince1970): distance = \(distance)")

            let ret =  [
              "distance": distance,
              "startDate" : statistics.startDate.timeIntervalSince1970 * 1000.0,
              "endDate": statistics.endDate.timeIntervalSince1970 * 1000.0
              ] as [String : Any]
            distanceArray.append(ret as NSObject)
          }
        }
        completion(distanceArray, error as NSError?)
      }
    }

    healthKitStore.execute(query)
  }

活动卡路里/小时

func activityCalories(_ startDate:NSDate, endDate:NSDate, anchorDate:NSDate, completion: @escaping (Array<NSObject>, NSError?) -> ()) {
    let type = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.activeEnergyBurned)
    let interval = NSDateComponents()
    interval.hour = 1

    let predicate = HKQuery.predicateForSamples(withStart: startDate as Date, end: endDate as Date, options: .strictEndDate)
    let query = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: predicate, options: [.cumulativeSum], anchorDate: anchorDate as Date, intervalComponents:interval as DateComponents)

    query.initialResultsHandler = { query, results, error in
      if let myResults = results{
        var caloriesArray: [NSObject] = []
        myResults.enumerateStatistics(from: startDate as Date, to: endDate as Date) {
          statistics, stop in

          if let quantity = statistics.sumQuantity() {
            let calories = quantity.doubleValue(for: HKUnit.kilocalorie())
            print("\(statistics.endDate.timeIntervalSince1970): calories = \(calories)")

            let ret =  [
              "calories": calories,
              "startDate" : statistics.startDate.timeIntervalSince1970 * 1000.0,
              "endDate": statistics.endDate.timeIntervalSince1970 * 1000.0
              ] as [String : Any]
            caloriesArray.append(ret as NSObject)
          }
        }
        completion(caloriesArray, error as NSError?)
      }
    }

    healthKitStore.execute(query)
  }

我想将所有这些组合到一个对象中。

 [
    {
         steps: 70,
         distance:10,
         calories: 200,
         startDate: ...,
         endDate: ...,
     },...
 ]

是否可以直接从HealthKit本身以每小时间隔的速率生成以上格式的数据？ 如果不可能的话，如何将所有3个数据合并到一个对象中，数据的范围可以是一天中的一个月，一个月，一个月。