获取Apple Watch heartRateVariabilitySDNN实时信息? [英] Get Apple watch heartRateVariabilitySDNN realtime?

问题描述

• 我正在使用下面的函数来获取heartRateVariabilitySDNN，但是它只能获取一次，并且不能像listenbeat一样实时计算?

• I am using below function to get heartRateVariabilitySDNN, but its get only once and not calculate realtime like hearbeat does?

func HRVstart(){守护让数量类型= HKObjectType.quantityType(forIdentifier:.heartRateVariabilitySDNN)否则{return}

func HRVstart() { guard let quantityType = HKObjectType.quantityType(forIdentifier: .heartRateVariabilitySDNN) else { return }

                self.healthStore.execute(self.HRVStreamingQuery())

                // Create query to receive continiuous heart rate samples.
                let datePredicate = HKQuery.predicateForSamples(withStart: Date(), end: nil, options: .strictStartDate)
                let devicePredicate = HKQuery.predicateForObjects(from: [HKDevice.local()])
                let queryPredicate = NSCompoundPredicate(andPredicateWithSubpredicates:[datePredicate, devicePredicate])
                let updateHandler: HKQueryUpdateHandler = { [weak self] query, samples, deletedObjects, queryAnchor, error in
                    if let quantitySamples = samples as? [HKQuantitySample] {
                        self?.HRVprocess(samples: quantitySamples)
                    }
                }
                let query = HKAnchoredObjectQuery(type: quantityType,
                                                  predicate: queryPredicate,
                                                  anchor: nil,
                                                  limit: HKObjectQueryNoLimit,
                                                  resultsHandler: updateHandler)
                query.updateHandler = updateHandler

                // Execute the heart rate query.
                healthStore.execute(query)

                // Remember all active Queries to stop them later.
                self.HRVactiveQueries.append(query)
            }

    private func HRVStreamingQuery() -> HKQuery {
            let predicate = HKQuery.predicateForSamples(withStart: NSDate() as Date, end: nil, options: .strictStartDate)

            let query = HKAnchoredObjectQuery(type: self.heartRateVaribalityType, predicate: nil, anchor: nil, limit: Int(HKObjectQueryNoLimit)) {
                (query, samples, deletedObjects, anchor, error) -> Void in
                self.HRVformatSamples(samples: samples)
            }

            query.updateHandler = { (query, samples, deletedObjects, anchor, error) -> Void in
                self.HRVformatSamples(samples: samples)
            }
            self.HRVactiveQueries.append(query)

            return query
        }
  private func HRVformatSamples(samples: [HKSample]?) {

        guard let samples = samples as? [HKQuantitySample] else { return }
        guard let quantity = samples.last?.quantity else { return }
        let beats = quantity.doubleValue(for: HKUnit.secondUnit(with: .milli))
        let timestamp = samples[0].endDate

        let newHeartRateVariablity = HeartRateVariablity(timestamp: timestamp, hrv: beats)

        delegate?.heartRateVariablity(didChangeTo: newHeartRateVariablity)


        print("HeartRateVariablity: \(beats)")
    }

推荐答案

根据我的经验，HRV仅由watchOS在特定时间测量.锻炼活动似乎不是其中之一.使用呼吸"应用似乎触发了HRV测量.

From my experience, HRV is only measured at specific times by watchOS. A workout activity does not seem to be one of those times. Using the 'Breathe' app seems to trigger a HRV measurement.

这不是一个很好的解决方案，但是您可以要求用户在活动会话前后进行测量之前和之后使用呼吸"应用程序.但是我不知道在会议期间获取当前HRV编号的任何方法.

It's not a great solution, but you can ask your users to use the 'Breathe' app before and after the activity session for before and after measurements. But I don't know of any way to get current HRV numbers during the session.

我希望其他人有更好的解决方案！

I hope someone else has a better solution!

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