获取HealthKit中每个日期的总步数

时间：2015-04-11 20:04:49

标签： objective-c health-kit hksamplequery

获取HealthKit中记录的每一天的总步数的最佳方法是什么？ 使用HKSampleQuery的方法initWithSampleType（见下文），我可以使用NSPredicate设置查询的开始和结束日期，但该方法每天返回一个包含许多HKQuantitySamples的数组。 

- (instancetype)initWithSampleType:(HKSampleType *)sampleType
                     predicate:(NSPredicate *)predicate
                         limit:(NSUInteger)limit
               sortDescriptors:(NSArray *)sortDescriptors
                resultsHandler:(void (^)(HKSampleQuery *query,
                                         NSArray *results,
                                         NSError *error))resultsHandler

我想我可以查询所有记录的步数并通过数组计算每一天的总步数，但我希望有一个更简单的解决方案，因为会有成千上万的HKSampleQuery对象。有没有办法让initWithSampleType每天返回一个总步数？

6 个答案:

答案 0 :(得分：15)

您应该使用HKStatisticsCollectionQuery：

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *interval = [[NSDateComponents alloc] init];
interval.day = 1;

NSDateComponents *anchorComponents = [calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear
                                                 fromDate:[NSDate date]];
anchorComponents.hour = 0;
NSDate *anchorDate = [calendar dateFromComponents:anchorComponents];
HKQuantityType *quantityType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

// Create the query
HKStatisticsCollectionQuery *query = [[HKStatisticsCollectionQuery alloc] initWithQuantityType:quantityType
                                                                       quantitySamplePredicate:nil
                                                                                       options:HKStatisticsOptionCumulativeSum
                                                                                    anchorDate:anchorDate
                                                                            intervalComponents:interval];

// Set the results handler
query.initialResultsHandler = ^(HKStatisticsCollectionQuery *query, HKStatisticsCollection *results, NSError *error) {
    if (error) {
        // Perform proper error handling here
        NSLog(@"*** An error occurred while calculating the statistics: %@ ***",error.localizedDescription);
    }

    NSDate *endDate = [NSDate date];
    NSDate *startDate = [calendar dateByAddingUnit:NSCalendarUnitDay
                                             value:-7
                                            toDate:endDate
                                           options:0];

    // Plot the daily step counts over the past 7 days
    [results enumerateStatisticsFromDate:startDate
                                  toDate:endDate
                               withBlock:^(HKStatistics *result, BOOL *stop) {

                                   HKQuantity *quantity = result.sumQuantity;
                                   if (quantity) {
                                       NSDate *date = result.startDate;
                                       double value = [quantity doubleValueForUnit:[HKUnit countUnit]];
                                       NSLog(@"%@: %f", date, value);
                                   }

                               }];
};

[self.healthStore executeQuery:query];

答案 1 :(得分：6)

Port to Swift，不依赖于SwiftDate库

    let calendar = NSCalendar.current
    let interval = NSDateComponents()
    interval.day = 1

    var anchorComponents = calendar.dateComponents([.day, .month, .year], from: NSDate() as Date)
    anchorComponents.hour = 0
    let anchorDate = calendar.date(from: anchorComponents)

    // Define 1-day intervals starting from 0:00
    let stepsQuery = HKStatisticsCollectionQuery(quantityType: stepsCount!, quantitySamplePredicate: nil, options: .cumulativeSum, anchorDate: anchorDate!, intervalComponents: interval as DateComponents)

    // Set the results handler
    stepsQuery.initialResultsHandler = {query, results, error in
        let endDate = NSDate()
        let startDate = calendar.date(byAdding: .day, value: -7, to: endDate as Date, wrappingComponents: false)
        if let myResults = results{
            myResults.enumerateStatistics(from: startDate!, to: endDate as Date) { statistics, stop in
            if let quantity = statistics.sumQuantity(){
                let date = statistics.startDate
                let steps = quantity.doubleValue(for: HKUnit.count())
                print("\(date): steps = \(steps)")
                //NOTE: If you are going to update the UI do it in the main thread
                DispatchQueue.main.async {
                    //update UI components
                }

            }
            } //end block
        } //end if let
    }
    healthStore?.execute(stepsQuery)

答案 2 :(得分：1)

这是一个目前适用于Swift 2.0的翻译，使用SwiftDate库。

    let type = HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)
    let startDate = NSDate().beginningOfDay().oneWeekAgo()
    let interval = NSDateComponents()
    interval.day = 1

    let predicate = HKQuery.predicateForSamplesWithStartDate(startDate, endDate: NSDate(), options: .StrictStartDate)
    let query = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: predicate, options: [.CumulativeSum], anchorDate: NSDate().begginingOfDay(), intervalComponents:interval)

    query.initialResultsHandler = { query, results, error in


        let endDate = NSDate()
        let startDate = NSDate().beginningOfDay().oneWeekAgo()
        if let myResults = results{
            myResults.enumerateStatisticsFromDate(startDate, toDate: endDate) {
                statistics, stop in

                if let quantity = statistics.sumQuantity() {

                    let date = statistics.startDate
                    let steps = quantity.doubleValueForUnit(HKUnit.countUnit())
                    print("\(date): steps = \(steps)")
                }
            }
        }
    }

    healthKitStore.executeQuery(query)

答案 3 :(得分：0)

我把我包裹在一个完成区（目标-c）中。我发现最好的方法是将查询的startDate设置为今天午夜的日期。希望这有帮助，随时复制/粘贴开始

-(void)fetchHourlyStepsWithCompletionHandler:(void (^)(NSMutableArray *, NSError *))completionHandler{
NSMutableArray *mutArray = [NSMutableArray new];
NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];

NSDate *startDate = [calendar dateBySettingHour:0 minute:0 second:0 ofDate:[NSDate date] options:0];

NSDate *endDate = [NSDate date]; // Whatever you need in your case
HKQuantityType *type = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

// Your interval: sum by hour
NSDateComponents *intervalComponents = [[NSDateComponents alloc] init];
intervalComponents.hour = 1;

// Example predicate
NSPredicate *predicate = [HKQuery predicateForSamplesWithStartDate:startDate endDate:endDate options:HKQueryOptionStrictStartDate];

HKStatisticsCollectionQuery *query = [[HKStatisticsCollectionQuery alloc] initWithQuantityType:type quantitySamplePredicate:predicate options:HKStatisticsOptionCumulativeSum anchorDate:startDate intervalComponents:intervalComponents];
query.initialResultsHandler = ^(HKStatisticsCollectionQuery *query, HKStatisticsCollection *results, NSError *error) {
    [results
     enumerateStatisticsFromDate:startDate
     toDate:endDate
     withBlock:^(HKStatistics *result, BOOL *stop) {
         if (!result) {
             if (completionHandler) {
                 completionHandler(nil, error);
             }
             return;
         }

         HKQuantity *quantity = result.sumQuantity;


         NSDate *startDate = result.startDate;

         NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
         formatter.dateFormat = @"h a";


          NSString *dateString = [formatter stringFromDate:startDate];


         double steps = [quantity doubleValueForUnit:[HKUnit countUnit]];


         NSDictionary *dict = @{@"steps" : @(steps),
                                @"hour" : dateString
                                };

         [mutArray addObject:dict];

     }];

    if (completionHandler) {
        completionHandler(mutArray, error);

    }
};

[self.healthStore executeQuery:query];

}

答案 4 :(得分：0)

使用核心Swift类修改@ sebastianr的答案，仅用于测试我只返回一天的步骤，一旦你有更多的日子你可以创建一个日期和步数字典并返回它

func getStepCountPerDay(completion:@escaping (_ count: Double)-> Void){

    guard let sampleType = HKObjectType.quantityType(forIdentifier: .stepCount)
        else {
            return
    }
    let calendar = Calendar.current
    var dateComponents = DateComponents()
    dateComponents.day = 1

    var anchorComponents = calendar.dateComponents([.day, .month, .year], from: Date())
    anchorComponents.hour = 0
    let anchorDate = calendar.date(from: anchorComponents)

    let stepsCumulativeQuery = HKStatisticsCollectionQuery(quantityType: sampleType, quantitySamplePredicate: nil, options: .cumulativeSum, anchorDate: anchorDate!, intervalComponents: dateComponents
    )

    // Set the results handler
    stepsCumulativeQuery.initialResultsHandler = {query, results, error in
        let endDate = Date()
        let startDate = calendar.date(byAdding: .day, value: 0, to: endDate, wrappingComponents: false)
        if let myResults = results{
            myResults.enumerateStatistics(from: startDate!, to: endDate as Date) { statistics, stop in
                if let quantity = statistics.sumQuantity(){
                    let date = statistics.startDate
                    let steps = quantity.doubleValue(for: HKUnit.count())
                    print("\(date): steps = \(steps)")
                    completion(steps)
                    //NOTE: If you are going to update the UI do it in the main thread
                    DispatchQueue.main.async {
                        //update UI components
                    }
                }
            } //end block
        } //end if let
    }
    HKHealthStore().execute(stepsCumulativeQuery)
}

答案 5 :(得分：-1)

使用更新的Swift 2.0＆amp; SwiftDate图书馆。

let type = HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)
let startDate = NSDate().beginningOfDay
let interval = NSDateComponents()
interval.day = 1

let predicate = HKQuery.predicateForSamplesWithStartDate(startDate, endDate: NSDate(), options: .StrictStartDate)
let query = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: predicate, options: [.CumulativeSum], anchorDate: NSDate().beginningOfDay, intervalComponents:interval)

query.initialResultsHandler = { query, results, error in


  let endDate = NSDate()
  let startDate = NSDate().beginningOfDay
  if let myResults = results{
    myResults.enumerateStatisticsFromDate(startDate, toDate: endDate) {
      statistics, stop in

      if let quantity = statistics.sumQuantity() {

        let date = statistics.startDate
        let steps = quantity.doubleValueForUnit(HKUnit.countUnit())
        print("\(date): steps = \(steps)")
      }
    }
  }
}
healthKitStore.executeQuery(query)
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