How to Get Walking and Running Distance Using Healthkit in Swift

How to get cycling duration from HealthKit for ios app using Swift

Use given below function. It give you leatest 7 record. According to your requirement you can also change it.

func getHealthDataValue ( HealthQuantityType : HKQuantityType , strUnitType : String , GetBackFinalhealthData: ((( healthValues : [AnyObject] ) -> Void)!) )
{          
    if let heartRateType = HKQuantityType.quantityTypeForIdentifier(HealthQuantityType.identifier)
    {
        if (HKHealthStore.isHealthDataAvailable()  ){

            let sortByTime = NSSortDescriptor(key:HKSampleSortIdentifierEndDate, ascending:false)

            //            let timeFormatter = NSDateFormatter()
            //            timeFormatter.dateFormat = "hh:mm:ss"
            //yyyy-MM-dd'T'HH:mm:ss.SSSZZZZ

            let dateFormatter = NSDateFormatter()
            dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"

        let query = HKSampleQuery(sampleType:heartRateType, predicate:nil, limit:7, sortDescriptors:[sortByTime], resultsHandler:{(query, results, error) in

            guard let results = results else {

                //include the healthkit error in log
                if let errorDescription = error!.description as String?
                {

                    GetBackFinalhealthData (healthValues: ["nodata"])
                }
                return
            }

            var arrHealthValues     = [AnyObject]()

            for quantitySample in results {
                let quantity = (quantitySample as! HKQuantitySample).quantity
                let healthDataUnit : HKUnit
                if (strUnitType.length > 0 ){
                    healthDataUnit = HKUnit(fromString: strUnitType)
                }else{
                    healthDataUnit = HKUnit.countUnit()
                }

                let tempActualhealthData = "\(quantity.doubleValueForUnit(healthDataUnit))"
                let tempActualRecordedDate = "\(dateFormatter.stringFromDate(quantitySample.startDate))"
                if  (tempActualhealthData.length > 0){
                    let dicHealth : [String:AnyObject] = [HealthValue.kIdentifierValue :tempActualhealthData , HealthValue.kRecordDate :tempActualRecordedDate , HealthValue.kIdentifierDisplayUnit : strUnitType ]

                    arrHealthValues.append(dicHealth)
                }
            }

            if  (arrHealthValues.count > 0)
            {
                GetBackFinalhealthData (healthValues: arrHealthValues)
            }
            else
            {
                GetBackFinalhealthData (healthValues: [HealthValue.kNoData])
            }
        })
        (self.HealthStore as! HKHealthStore).executeQuery(query)
    }
}

}

Use above function as follow.
Here you need to pass a type and unit.

self.getHealthDataValue(HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBloodPressureDiastolic), strUnitType: "mmHg"
                ) { (arrHealth) -> Void in                  
            }

HealthKit Swift getting today's steps

Here is the right way using HKStatisticsCollectionQuery courtesy of the direction from the code above.

This is written in Swift 3 so you may have to convert some of the code back to 2.3 or 2 if not on 3 yet.

Swift 3

 func retrieveStepCount(completion: (stepRetrieved: Double) -> Void) {

        //   Define the Step Quantity Type
        let stepsCount = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)

        //   Get the start of the day         
        let date = Date()
        let cal = Calendar(identifier: Calendar.Identifier.gregorian)
        let newDate = cal.startOfDay(for: date)

        //  Set the Predicates & Interval
        let predicate = HKQuery.predicateForSamples(withStart: newDate, end: Date(), options: .strictStartDate)
        var interval = DateComponents()
        interval.day = 1

        //  Perform the Query
        let query = HKStatisticsCollectionQuery(quantityType: stepsCount!, quantitySamplePredicate: predicate, options: [.cumulativeSum], anchorDate: newDate as Date, intervalComponents:interval)

        query.initialResultsHandler = { query, results, error in

            if error != nil {

                //  Something went Wrong
                return
            }

            if let myResults = results{
                myResults.enumerateStatistics(from: self.yesterday, to: self.today) {
                    statistics, stop in

                    if let quantity = statistics.sumQuantity() {

                        let steps = quantity.doubleValue(for: HKUnit.count())

                        print("Steps = \(steps)")
                        completion(stepRetrieved: steps)

                    }
                }
            }

        }

        storage.execute(query)
    }

Objective-C

HKQuantityType *type = [HKSampleType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

NSDate *today = [NSDate date];
NSDate *startOfDay = [[NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian] startOfDayForDate:today];

NSPredicate *predicate = [HKQuery predicateForSamplesWithStartDate:startOfDay endDate:today options:HKQueryOptionStrictStartDate];
NSDateComponents *interval = [[NSDateComponents alloc] init];
interval.day = 1;

HKStatisticsCollectionQuery *query = [[HKStatisticsCollectionQuery alloc] initWithQuantityType:type quantitySamplePredicate:predicate options:HKStatisticsOptionCumulativeSum anchorDate:startOfDay intervalComponents:interval];

query.initialResultsHandler = ^(HKStatisticsCollectionQuery * _Nonnull query, HKStatisticsCollection * _Nullable result, NSError * _Nullable error) {
  if (error != nil) {
    // TODO
  } else {
    [result enumerateStatisticsFromDate:startOfDay toDate:today withBlock:^(HKStatistics * _Nonnull result, BOOL * _Nonnull stop) {
      HKQuantity *quantity = [result sumQuantity];
      double steps = [quantity doubleValueForUnit:[HKUnit countUnit]];
      NSLog(@"Steps : %f", steps);
    }];
  }
};

[self.storage executeQuery:query];

how to get totalDistance of HKWorkout

Add your distance samples to HKWorkoutBuilder using its addSamples method. The total distance will be calculated for you based on the samples you add. e.g you can add samples of type HKQuantityTypeIdentifierDistanceWalkingRunning to the workout and it should populate totalDistance.

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