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我HKAnchoredObjectQuery用于查询心率，因为我不想为此应用程序使用 WorkoutBuilder API。在锻炼期间，此查询始终以正常采样率（每秒等）返回心率，但我注意到在 Series 5 Watch OS 6.1 上进行测试时，我只看到非常零星的样本，例如一小时内采集的 5 次心率。文档中没有任何内容HKAnchoredObjectQuery表明它已被弃用。知道为什么这种心率收集方法不再有效吗？

    func startHeartRateQuery(from startDate: Date, updateHandler: @escaping ([HKQuantitySample]) -> Void) {
        let typeIdentifier = HKQuantityTypeIdentifier.heartRate
        startQuery(ofType: typeIdentifier, from: startDate) { _, samples, _, _, error in
            guard let quantitySamples = samples as? [HKQuantitySample] else {
                print("Heart rate query failed with error: \(String(describing: error))")
                return
            }
            updateHandler(quantitySamples)

        }
    }


   //Generic helper function 
    private func startQuery(ofType type: HKQuantityTypeIdentifier, from startDate: Date, handler: @escaping
        (HKAnchoredObjectQuery, [HKSample]?, [HKDeletedObject]?, HKQueryAnchor?, Error?) -> Void) {
        let datePredicate = HKQuery.predicateForSamples(withStart: startDate, end: nil, options: .strictStartDate)
        let devicePredicate = HKQuery.predicateForObjects(from: [HKDevice.local()])
        let queryPredicate = NSCompoundPredicate(andPredicateWithSubpredicates:[datePredicate, devicePredicate])

        let quantityType = HKObjectType.quantityType(forIdentifier: type)!

        let query = HKAnchoredObjectQuery(type: quantityType, predicate: queryPredicate, anchor: nil,
                                          limit: HKObjectQueryNoLimit, resultsHandler: handler)
        query.updateHandler = handler
        healthStore.execute(query)

        activeDataQueries.append(query)
    }
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1 回答 1

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奇怪，但事实证明我在 Watch App 的设置中设置了锻炼省电模式。除非我意外设置它在我安装 Watch OS 6 时设置为开启？将其关闭后，心率查询再次正常返回。

于 2019-10-29T01:30:37.330 回答