[英]How to create an HKQuantitySample from HKStatistics?
I'm trying to process HKStatistics
that are heart rates and create an HKQuantitySample
so that I can append to a local array.我试图过程
HKStatistics
是心脏速率,并创建一个HKQuantitySample
,这样我可以追加到本地阵列。 I can't figure out what dates to use for startDate
and endDate
, currently I'm just using Date()
but I would rather be more precise and use the actual sample's date.我不知道用于
startDate
和endDate
日期,目前我只是使用Date()
但我宁愿更精确并使用实际样本的日期。 statistics.StartDate
just gives you the date that the statistic collection started, but not the date of the individual sample/statistic. statistics.StartDate
只为您提供统计数据收集开始的日期,而不是单个样本/统计数据的日期。 I see that the statistic also has a mostRecentQuantityDateInterval()
property but not sure how to use it here.我看到统计数据也有一个
mostRecentQuantityDateInterval()
属性,但不知道如何在这里使用它。
private func processStatistics(withStatistics statistics: HKStatistics?) {
// Make sure we got non `nil` parameters.
guard let statistics = statistics else {
fatalError("no statistics in processStatistics")
}
// Dispatch to main, because we are updating the interface.
DispatchQueue.main.async {
switch statistics.quantityType {
case HKQuantityType.quantityType(forIdentifier: .heartRate):
if let unwrappedQuantity = statistics.mostRecentQuantity() {
let statisticAsHKQuantitySample = HKQuantitySample(type: statistics.quantityType, quantity: unwrappedQuantity, start: Date(), end: Date())
self.heartRateSamples.append(statisticAsHKQuantitySample)
}
I think you're looking for: mostRecentQuantityDateInterval()
我认为您正在寻找:
mostRecentQuantityDateInterval()
let interval = statistics.mostRecentQuantityDateInterval()
interval.start
interval.end
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