Question

我浏览过互联网，还阅读了developer.apple.com文档中的相关内容。有一些关于处理如何设置查询的教程，但我没有找到任何简单的方法从任何查询返回的HKSamples中提取数据值。在这种情况下，我确信必须有比字符串处理更优雅和多功能的东西。

继承了我的代码，这对我很有用：

var anchor : HKQueryAnchor? = nil

func newStreamingQuery(withIdentifier: HKQuantityTypeIdentifier) {
        let hkqType = HKQuantityType.quantityType(forIdentifier: withIdentifier)!
        let observer = HKObserverQuery(sampleType: hkqType, predicate: nil, updateHandler:
            {(queryResult, completionHandler, error) in
            if (error != nil) { print( error!.localizedDescription) ; return}
                // We recreate the query every time becuase it can only be used once.
                let query =  HKAnchoredObjectQuery(type: hkqType, predicate: nil, anchor: self.anchor, limit: HKObjectQueryNoLimit, resultsHandler: { (query, samples, deleted, newAnchor, error) in
                    if error != nil {print(error!) ; return}
                    self.anchor = newAnchor
                    print ("\(samples!.count)\n")
                    for i in ( 0..<samples!.count)
                    {  // What do i do to access the data in s sensible fassion.
                        let hktype = samples![i]
                        let value = hktype// do something with hktype to get the value out
                        let time = hktype// do something with hktype to get the time out
                        print("\(value)\n")}
                  completionHandler()
                })

            WatchHelthKitHelper.healthStore.execute(query)
            })
        WatchHelthKitHelper.healthStore.execute(observer)
    }

如果我这样称呼它：

func startStreamingQuery(){
    newStreamingQuery(withIdentifier: HKQuantityTypeIdentifier.heartRate)
}

我得到了这样的好输出：

1

1.56667 count/s 723404AC-C90C-4374-B75A-AAE7CD166115 "Jason’s Apple Watch" (3.1) "Apple Watch"  (2017-01-02 15:59:42 +0800 - 2017-01-02 15:59:42 +0800)

1

1.63333 count/s 148B311D-57EE-4D65-B560-765E7E8319C6 "Jason’s Apple Watch" (3.1) "Apple Watch"  (2017-01-02 15:59:46 +0800 - 2017-01-02 15:59:46 +0800)

1

1.65 count/s F92DD3AE-0527-48D1-B75B-3F04D6C0ABCF "Jason’s Apple Watch" (3.1) "Apple Watch"  (2017-01-02 15:59:49 +0800 - 2017-01-02 15:59:49 +0800)

1

1.63333 count/s 0CF55099-6D51-408D-B322-00A8F469AF54 "Jason’s Apple Watch" (3.1) "Apple Watch"  (2017-01-02 15:59:53 +0800 - 2017-01-02 15:59:53 +0800)

1

1.48333 count/s 1FCD3472-081F-4479-80F2-543A45CCA221 "Jason’s Apple Watch" (3.1) "Apple Watch"  (2017-01-02 16:00:00 +0800 - 2017-01-02 16:00:00 +0800)

我确信很容易做到这一点，但我觉得它必须隐藏在我目前不理解的概念之下。

非常感谢你的答案。

此外，如果有人知道如何获得更详细的心脏波/脉搏数据，那么爱听到它。

Answer 1

这可能适合你。

let health: HKHealthStore = HKHealthStore()
let heartRateUnit:HKUnit = HKUnit(fromString: "count/min")
let heartRateType:HKQuantityType   = HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeartRate)!
var heartRateQuery:HKSampleQuery?


/*Method to get todays heart rate - this only reads data from health kit. */
 func getTodaysHeartRates()
    {
        //predicate
        let calendar = NSCalendar.currentCalendar()
        let now = NSDate()
        let components = calendar.components([.Year,.Month,.Day], fromDate: now)
        guard let startDate:NSDate = calendar.dateFromComponents(components) else { return }
        let endDate:NSDate? = calendar.dateByAddingUnit(.Day, value: 1, toDate: startDate, options: [])
        let predicate = HKQuery.predicateForSamplesWithStartDate(startDate, endDate: endDate, options: .None)

        //descriptor
        let sortDescriptors = [
                                NSSortDescriptor(key: HKSampleSortIdentifierEndDate, ascending: false)
                              ]

        heartRateQuery = HKSampleQuery(sampleType: heartRateType,
                                        predicate: predicate,
                                        limit: 25,
                                        sortDescriptors: sortDescriptors)
            { (query:HKSampleQuery, results:[HKSample]?, error:NSError?) -> Void in

                guard error == nil else { print("error"); return }

                //self.printHeartRateInfo(results)

                self.updateHistoryTableViewContent(results)

        }//eo-query
        health.executeQuery(heartRateQuery!)

   }//eom

/*used only for testing, prints heart rate info */
private func printHeartRateInfo(results:[HKSample]?)
    {
        for(var iter = 0 ; iter < results!.count; iter++)
        {
            guard let currData:HKQuantitySample = results![iter] as? HKQuantitySample else { return }

            print("[\(iter)]")
            print("Heart Rate: \(currData.quantity.doubleValueForUnit(heartRateUnit))")
            print("quantityType: \(currData.quantityType)")
            print("Start Date: \(currData.startDate)")
            print("End Date: \(currData.endDate)")
            print("Metadata: \(currData.metadata)")
            print("UUID: \(currData.UUID)")
            print("Source: \(currData.sourceRevision)")
            print("Device: \(currData.device)")
            print("---------------------------------\n")
        }//eofl
    }//eom

如何在swift中的查询返回时明智地从HealthKits HKSample中获取数据

1 个答案: