如何使用Swift查询Healthkit的平均心率

概述我需要使用 Swift 2.2查询HKStatistics的平均心率.我从研究中学到了我需要的参数是HKStatisticsOptionDiscreteAverage 我有锻炼课程的代码.如何在以下测量心率的代码中添加该功能,以使用HKStatisticsOptionDiscreteAverage返回锻炼会话的心率平均值？ func createHeartRateStreamingQuery(wo 我需要使用 Swift 2.2查询HKStatistics的平均心率.我从研究中学到了我需要的参数是HKStatisticsOptiondiscreteAverage

我有锻炼课程的代码.如何在以下测量心率的代码中添加该功能,以使用HKStatisticsOptiondiscreteAverage返回锻炼会话的心率平均值？

func createHeartRateStreamingquery(workoutStartDate: NSDate) -> HKquery? {    // adding predicate will not work    // let predicate = HKquery.predicateForSamplesWithStartDate(workoutStartDate,endDate: nil,options: HKqueryOptions.None)    guard let quantityType = HKObjectType.quantityTypeForIDentifIEr(HKQuantityTypeIDentifIErHeartRate) else { return nil }    let heartRatequery = HKAnchoredobjectquery(type: quantityType,predicate: nil,anchor: anchor,limit: Int(HKObjectqueryNolimit)) { (query,sampleObjects,deletedobjects,newAnchor,error) -> VoID in        guard let newAnchor = newAnchor else {return}         self.anchor = newAnchor        self.updateHeartRate(sampleObjects)    }    heartRatequery.updateHandler = {(query,samples,deleteObjects,error) -> VoID in        self.anchor = newAnchor!        self.updateHeartRate(samples)    }    return heartRatequery}func updateHeartRate(samples: [HKSample]?) {    guard let heartRateSamples = samples as? [HKQuantitySample] else {return}    dispatch_async(dispatch_get_main_queue()) {        guard let sample = heartRateSamples.first else{return}        let value = sample.quantity.doubleValueForUnit(self.heartRateUnit)        self.label.setText(String(UInt16(value)))        // retrIEve source from sample        let name = sample.sourceRevision.source.name        self.updateDevicename(name)        self.animateHeart()    }}

解决方法

func getAVGHeartRate() {    var typeHeart = HKQuantityType.quantityType(forIDentifIEr: .heartRate)    var startDate = Date() - 7 * 24 * 60 * 60 // start date is a week    var predicate: nspredicate? = HKquery.predicateForSamples(withStart: startDate,end: Date(),options: HKqueryOptions.strictEndDate)    var squery = HKStatisticsquery(quantityType: typeHeart!,quantitySamplePredicate: predicate,options: .discreteAverage,completionHandler: {(query: HKStatisticsquery,result: HKStatistics?,error: Error?) -> VoID in        dispatchQueue.main.async(execute: {() -> VoID in            var quantity: HKQuantity? = result?.averageQuantity()            var beats: Double? = quantity?.doubleValue(for: HKUnit.count().unitdivIDed(by: HKUnit.minute()))            print("got: \(String(format: "%.f",beats!))")        })        })    healthStore.execute(squery)}

这是Swift 3版:)

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