swift - HealthKit 统计查询中的“尝试转换不兼容的单位”错误(swift)

Question

我需要计算卡路里的累计总和，并收到错误“NSInvalidArgumentException”，原因:“尝试转换不兼容的单位:千卡，计数”

在线:

let numberOfCalories = Int(sumQuantity.doubleValueForUnit(self.caloriesUnit))

我的单位被定义为:

let caloriesUnit = HKUnit.countUnit()

它应该是不同的东西吗？如何返回卡路里数？

我的职能是:

func queryCaloriesSum() {

    let caloriesQuantityType = HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierActiveEnergyBurned) //else //{ return nil }

    let sumOption = HKStatisticsOptions.CumulativeSum
    let statisticsSumQuery = HKStatisticsQuery(quantityType: caloriesQuantityType!, quantitySamplePredicate: nil, options: sumOption) { [unowned self] (query, result, error) in
        if let sumQuantity = result?.sumQuantity() {

           // let headerView = self.tableView.dequeueReusableCellWithIdentifier(self.totalStepsCellIdentifier)! as UITableViewCell

            let numberOfCalories = Int(sumQuantity.doubleValueForUnit(self.caloriesUnit))

        print(numberOfCalories)
        }

    }
    healthStore.executeQuery(statisticsSumQuery)
    print(statisticsSumQuery)

}

Answer 1

My unit has been defined as:

let caloriesUnit = HKUnit.countUnit()

Should it be something different? How can I return the number of calories?

如何使用 calories卡路里？