现在,我正在尝试设置我的应用程序,以便在用户更新他们的步数时调用一个函数。到目前为止,我有以下代码:
let steps: HKObjectType = HKObjectType.quantityType(forIdentifier: .stepCount)!
if healthStore.authorizationStatus(for: steps) != HKAuthorizationStatus.notDetermined {
healthStore.enableBackgroundDelivery(for: steps, frequency: .immediate, withCompletion: { (worked, error) in
//registers for background data
if error != nil {
print(error)
}
})
let sampleType = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)!
let query = HKObserverQuery(sampleType: sampleType, predicate: nil) {
query, completionHandler, error in
if error != nil {
print(error)
abort()
}
// Take whatever steps are necessary to update your app's data and UI
// This may involve executing other queries
self.getSteps(completion: { (stepCount) in
print("Step count was updated to \(stepCount)")
})
completionHandler()
}
healthStore.execute(query)
}
但是,当用户的 stepCount 在后台更新时不会调用此方法,尽管该getSteps
方法在前台时确实有效。我是否正确地解决了这个问题,或者我正在尝试做的事情是不可能的?