ios - 查询 HealthKit 以获取当天的总步数

Question

我正在调用一个函数，并且一直在尝试弄清楚如何更新我的应用程序以反射(reflect)当天的总步数。目前，我的代码只提供了最近记录的步数。我在理解如何使用 HKStatisticsQuery 时遇到了问题，但这是我目前拥有的功能，可以提供最新的结果。

-(void)updateStepsLabel{
        // Query to get the user's latest steps, if it exists.
HKQuantityType *stepsType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

[_healthStore aapl_mostRecentQuantitySampleOfType:stepsType predicate:nil completion:^(HKQuantity *mostRecentQuantity, NSError *error) {
    if (!mostRecentQuantity) {
        NSLog(@"Either an error occured fetching the user's steps information or none has been stored yet. In your app, try to handle this gracefully.");

        dispatch_async(dispatch_get_main_queue(), ^{
            self.todaysStepValueLabel.text = NSLocalizedString(@"Not available", nil);
        });
    }
    else {
        // Determine the steps in the required unit.
        HKUnit *stepUnit = [HKUnit countUnit];
        double usersWeight = [mostRecentQuantity doubleValueForUnit:stepUnit];

        // Update the user interface.
        dispatch_async(dispatch_get_main_queue(), ^{
            self.todaysStepValueLabel.text = [NSNumberFormatter localizedStringFromNumber:@(usersWeight) numberStyle:NSNumberFormatterNoStyle];
            self.todaysStepValueLabel.textColor = [UIColor blackColor];
            self.todaysStepValueLabel.font = [UIFont systemFontOfSize:25];


        });
    }
}];

}

Answer 1

这里贴出一个Swift代码的答案，希望你能转成Obj-c

我在类中写了下面的函数，定义如下

class MyHealthStore: HKHealthStore { }

.

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

    let type = HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount) // The type of data we are requesting

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

    let anchorComponents = calendar.components([.Day , .Month , .Year], fromDate: NSDate())
    anchorComponents.hour = 0
    let anchorDate = calendar.dateFromComponents(anchorComponents)

    let stepsQuery = HKStatisticsCollectionQuery(quantityType: type!, quantitySamplePredicate: nil, options: .CumulativeSum, anchorDate: anchorDate!, intervalComponents: interval)

    stepsQuery.initialResultsHandler = {query, results, error in
        let endDate = NSDate()

        var totalSteps = 0.0
        let startDate = calendar.dateByAddingUnit(.Day, value: 0, toDate: endDate, options: [])
        if let myResults = results{  myResults.enumerateStatisticsFromDate(startDate!, toDate: endDate) { statistics, stop in
            if let quantity = statistics.sumQuantity(){
                //let date = statistics.startDate
                totalSteps = quantity.doubleValueForUnit(HKUnit.countUnit())
               // print("\(date): steps = \(steps)")
            }
            self.todayManuallyAddedSteps({ (manuallSteps, error) in
                if error != nil {
                    print(error)
                } else {
                   totalSteps = totalSteps - manuallSteps
                    completion(stepRetrieved: totalSteps)
                    return
                }
            })
            //completion(stepRetrieved: totalSteps)

            }
        } else {
            // mostly not executed
            completion(stepRetrieved: totalSteps)
        }
    }
    executeQuery(stepsQuery)
}

如果您想截断手动添加的步骤，请使用此功能

func todayManuallyAddedSteps(completion: (Double, NSError?) -> () )
{
    let type = HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount) // The type of data we are requesting

    let date = NSDate()
    let cal = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
    let newDate = cal.startOfDayForDate(date)
    let predicate = HKQuery.predicateForSamplesWithStartDate(newDate, endDate: NSDate(), options: .None) // Our search predicate which will fetch all steps taken today

    // The actual HealthKit Query which will fetch all of the steps and add them up for us.

    let query = HKSampleQuery(sampleType: type!, predicate: predicate, limit: 0, sortDescriptors: nil) { query, results, error in
        var steps: Double = 0

        if results?.count > 0
        {
            for result in results as! [HKQuantitySample]
            {
                // checking and adding manually added steps
                if result.sourceRevision.source.name == "Health" {
                    // these are manually added steps

                    steps += result.quantity.doubleValueForUnit(HKUnit.countUnit())
                }
                else{
                    // these are auto detected steps which we do not want from HKSampleQuery
                }
            }
            completion(steps, error)

            return
        } else {
            // mostly not executed
            completion(steps, error)
        }
    }
    executeQuery(query)
}

下面是如何调用它

 MyHealthStore.sharedHealthStore.TodayTotalSteps { (stepRetrieved) in 
     print(stepRetrieved)
 }

希望对您有所帮助，如果您发现任何困难，请告诉我。