Iphone 如何阅读在healthkit中运行的HKWorkUtactivityType？

我尝试在下面的代码中从healthapp读取数据，但得到的结果为nil值，并且错误为无效的HKObjectType HKQuantityTypeIdentifierDistanceWalkingRunning for keyPath workoutType

mac版本：10.10.5 xcode版本：7.1

let distanceType =
        HKObjectType.quantityTypeForIdentifier(
            HKQuantityTypeIdentifierDistanceWalkingRunning)

        let workoutPredicate = HKQuery.predicateForWorkoutsWithWorkoutActivityType(HKWorkoutActivityType.Running)

        let startDateSort =
        NSSortDescriptor(key: HKSampleSortIdentifierStartDate, ascending: true)

        let query = HKSampleQuery(sampleType: distanceType!, predicate: workoutPredicate,
            limit: 0, sortDescriptors: [startDateSort]) {
                (sampleQuery, results, error) -> Void in

                if let distanceSamples = results as? [HKQuantitySample] {

                    // process the detailed samples...

                }
                else {
                    // Perform proper error handling here...
                    print("*** An error occurred while adding a sample to " +
                        "the workout: \(error!.localizedDescription)")

                    abort()
                }
        }

               // Execute the query
        healthManager.healthKitStore.executeQuery(query)

下面是访问healthkit数据的代码

// 1. Set the types you want to read from HK Store
        let typeOfRead = [HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierDietaryEnergyConsumed)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierActiveEnergyBurned)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeight)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBodyMass)!,
            HKObjectType.characteristicTypeForIdentifier(HKCharacteristicTypeIdentifierDateOfBirth)!,
            HKObjectType.characteristicTypeForIdentifier(HKCharacteristicTypeIdentifierBiologicalSex)!,
            HKObjectType.characteristicTypeForIdentifier(HKCharacteristicTypeIdentifierBloodType)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierDistanceWalkingRunning)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeartRate)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierOxygenSaturation)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBloodPressureDiastolic)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBloodPressureSystolic)!]

        let typeOfReads = NSSet(array: typeOfRead)

        // 2. Set the types you want to write to HK Store

        let typeOfWrite = [

            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierDietaryEnergyConsumed)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierActiveEnergyBurned)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeight)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBodyMass)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)!,
            HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierDistanceWalkingRunning)!

        ]

        let typeOfWrites = NSSet(array: typeOfWrite)

使用以下命令：

let query = HKSampleQuery(sampleType: HKWorkoutType.workoutType(), predicate: workoutPredicate,
        limit: 0, sortDescriptors: [startDateSort]) {
    // ...
}

在样本类型中，您表示希望选择训练。 谓词确定用于选择的训练属性

您告诉healthSore选择具有训练属性的跑步样本。那不合适