如何获取过去7天的健康数据
如何获取过去7天的健康数据
提问于 2018-03-10 15:33:01
我试图从过去的7天中获得步骤，但我无法找到如何做到这一点。我想要接收的是一个由7个元素组成的数组，其中每个元素都是一天，每个元素都有相应的步骤。我现在有这样的代码，它获得了今天的步骤：
//Gets the steps
func getTodaysSteps(completion: @escaping (Double) -> Void) {
let stepsQuantityType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
let now = Date()
let startOfDay = Calendar.current.startOfDay(for: now)
let predicate = HKQuery.predicateForSamples(withStart: startOfDay, end: now, options: .strictStartDate)
let query = HKStatisticsQuery(quantityType: stepsQuantityType, quantitySamplePredicate: predicate, options: .cumulativeSum) { (_, result, error) in
guard let result = result, let sum = result.sumQuantity() else {
print("Failed to fetch steps = \(error?.localizedDescription ?? "N/A")")
completion(0.0)
return
}
DispatchQueue.main.async {
completion(sum.doubleValue(for: HKUnit.count()))
}
}
healthKitStore.execute(query)
}我把这个函数叫做：
getTodaysSteps { (steps) in
self.stepsNumber = Int(steps)
}回答 3
Stack Overflow用户
回答已采纳
发布于 2018-03-12 16:48:38
尝试使用HKStatisticsCollectionQuery，它将为您计算日期，并自动提取结果。下面是一个应该提供过去7天步骤计数的示例：
let stepsQuantityType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
let now = Date()
let exactlySevenDaysAgo = Calendar.current.date(byAdding: DateComponents(day: -7), to: now)!
let startOfSevenDaysAgo = Calendar.current.startOfDay(for: exactlySevenDaysAgo)
let predicate = HKQuery.predicateForSamples(withStart: startOfSevenDaysAgo, end: now, options: .strictStartDate)
let query = HKStatisticsCollectionQuery.init(quantityType: stepsQuantityType,
quantitySamplePredicate: predicate,
options: .cumulativeSum,
anchorDate: startOfSevenDaysAgo,
intervalComponents: DateComponents(day: 1))
query.initialResultsHandler = { query, results, error in
guard let statsCollection = results else {
// Perform proper error handling here...
}
statsCollection.enumerateStatistics(from: startOfSevenDaysAgo, to: now) { statistics, stop in
if let quantity = statistics.sumQuantity() {
let stepValue = quantity.doubleValueForUnit(HKUnit.countUnit())
// ...
}
}
}Stack Overflow用户
发布于 2019-04-12 15:57:10
这里还有更简单的解决方案。
func getTotalSteps(forPast days: Int, completion: @escaping (Double) -> Void) {
// Getting quantityType as stepCount
guard let stepsQuantityType = HKObjectType.quantityType(forIdentifier: .stepCount) else {
print("*** Unable to create a step count type ***")
return
}
let now = Date()
let startDate = Calendar.current.date(byAdding: DateComponents(day: -days), to: now)
let predicate = HKQuery.predicateForSamples(withStart: startDate, end: now, options: .strictStartDate)
let query = HKStatisticsQuery(quantityType: stepsQuantityType, quantitySamplePredicate: predicate, options: .cumulativeSum) { _, result, _ in
guard let result = result, let sum = result.sumQuantity() else {
completion(0.0)
return
}
completion(sum.doubleValue(for: HKUnit.count()))
}
execute(query)
}现在调用只需使用以下代码：
HKHealthStore().getTotalSteps(forPast: 30) { totalSteps in
print(totalSteps)
}Stack Overflow用户
发布于 2018-03-10 15:47:53
唯一需要实现的更改是更改作为Date参数提供给HKStatisticsQuery的HKStatisticsQuery对象。您可以创建一个代表7天前一天开始的Date对象，方法是首先使用Calendar.date(byAdding:,to:)返回7天的时间，然后对该对象调用startOfDay(for:)。
let now = Date()
let exactlySevenDaysAgo = Calendar.current.date(byAdding: DateComponents(day: -7), to: now)!
let startOfSevenDaysAgo = Calendar.current.startOfDay(for: exactlySevenDaysAgo)
let predicate = HKQuery.predicateForSamples(withStart: startOfSevenDaysAgo, end: now, options: .strictStartDate)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/49210818
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