如何使用AppleHealthKit監控耳機音頻曝光事件？

我正在構建一個應用程式，它會產生聲音并需要監控它們的音量。我正在嘗試使用 HealthKit，這是我迄今為止所做的：

private let healthStore = HKHealthStore()

func observeHeadphoneAudio() {
    guard let type = HKObjectType.categoryType(forIdentifier: .headphoneAudioExposureEvent) else {
        return
    }
    healthStore.requestAuthorization(toShare: nil, read: [type]) { [weak self] success, error in
        if let error = error {
            log.warning(error.localizedDescription)
        } else if success {
            self?.fetch(type: type)
        }
    }
}

func fetch(type: HKCategoryType) {
    let descriptor = HKQueryDescriptor(sampleType: type, predicate: nil)
    let query = HKObserverQuery(queryDescriptors: [descriptor]) { query, samples, completion, error in
        if let error = error {
            log.warning(error.localizedDescription)
        }
        if let samples = samples {
            log.info(samples)
        }
    }
    healthStore.execute(query)
}

我在生成聲音時啟動它，使用空樣本集執行一次查詢完成，就是這樣。

監聽耳機音頻曝光的正確方法是什么？

uj5u.com熱心網友回復：

您是在尋找耳機音頻曝光還是耳機音頻曝光事件？當您超過耳機音頻暴露限制時會生成后者。看

https://developer.apple.com/documentation/healthkit/hkquantitytypeidentifier/3081272-headphoneaudioexposure/ https://developer.apple.com/documentation/healthkit/hkcategorytypeidentifier/3552059-headphoneaudioexposureevent

uj5u.com熱心網友回復：

我將事件型別更改為headphoneAudioExposure并創建了如下內容：

private let healthStore = HKHealthStore()

func start() {
    authorize { [weak self] type in
        self?.runQuery(for: type)
    }
}

func authorize(successHandler: @escaping (HKQuantityType) -> Void ) {
    guard let type = HKObjectType.quantityType(forIdentifier: .headphoneAudioExposure) else {
        return
    }
    healthStore.requestAuthorization(toShare: nil, read: [type]) { success, error in
        if let error = error {
            log.warning(error.localizedDescription)
        } else if success {
            successHandler(type)
        } else {
            log.warning("Unknown error")
        }
    }
}

func runQuery(for type: HKQuantityType) {
    let startDate = Date()
    let predicate = HKQuery.predicateForSamples(withStart: startDate,
                                                end: .distantFuture,
                                                options: .strictStartDate)
    let interval = DateComponents(nanosecond: 500_000_000)

    let query = HKStatisticsCollectionQuery(quantityType: type,
                                            quantitySamplePredicate: predicate,
                                            options: .mostRecent,
                                            anchorDate: startDate,
                                            intervalComponents: interval)

    query.initialResultsHandler = { _, statisticsCollection, error in
        log.info("----------INITIAL-----------")
        if let error = error {
            log.warning(error.localizedDescription)
        } else if let lastStatistics = statisticsCollection?.statistics().last {
            log.info(lastStatistics.startDate)
            log.info(lastStatistics.endDate)
            log.info(lastStatistics.mostRecentQuantity())
        } else {
            log.warning("No statistics yet")
        }
        log.info("----------INITIAL-----------")
    }

    query.statisticsUpdateHandler = { _, statistics, _, error in
        if let error = error {
            log.warning(error.localizedDescription)
        } else if let statistics = statistics {
            log.info("---------UPDATE------------")
            log.info(statistics.startDate)
            log.info(statistics.endDate)
            log.info(statistics.mostRecentQuantity())
            log.info(statistics.quantityType)
        }
    }
    healthStore.execute(query)
}

這段代碼的問題是它有時作業有時不作業，我不知道為什么。此外，當我能夠獲取一些資料時，statisticsUpdateHandler它們每 60-70 秒就會以資料包的形式出現。任何建議，我做錯了什么？

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