【发布时间】:2018-07-20 22:03:59
【问题描述】:
这是一个 WatchOS 应用程序。通过测试,该代码似乎只会返回我手动添加到健康应用程序中的小于 1 周的体重值。这是故意的吗?有办法吗?
func getUserBodyMass(completion: @escaping (HKQuantitySample) -> Void) {
guard let weightSampleType = HKSampleType.quantityType(forIdentifier: .bodyMass) else {
print("Body Mass Sample Type is no longer available in HealthKit")
return
}
//1. Use HKQuery to load the most recent samples.
let mostRecentPredicate = HKQuery.predicateForSamples(withStart: Date.distantPast,
end: Date(),
options: [])
let sortDescriptor = NSSortDescriptor(key: HKSampleSortIdentifierStartDate,
ascending: false)
let limit = 1
let sampleQuery = HKSampleQuery(sampleType: weightSampleType,
predicate: mostRecentPredicate,
limit: limit,
sortDescriptors: [sortDescriptor]) { (query, samples, error) in
//2. Always dispatch to the main thread when complete.
DispatchQueue.main.async {
guard let samples = samples,
let mostRecentSample = samples.first as? HKQuantitySample else {
print("getUserBodyMass sample is missing")
return
}
completion(mostRecentSample)
}
}
healthStore.execute(sampleQuery)
}
【问题讨论】:
-
您是否在 watchOS 上运行此代码?
-
@Allan 是的,为什么?
标签: ios swift apple-watch healthkit watchos-4