问Healthkit后台交付秒内多次调用

EN

didFinishLaunchingWithOptions

 func startObservingKJ() {
     print("BG Code Called")
     let KJQuantityType = HKQuantityType.quantityType(forIdentifier: .activeEnergyBurned)!
     self.healthStore.enableBackgroundDelivery(for: KJQuantityType, frequency: .hourly) { (success, error) in
         if let unwrappedError = error {
             print("could not enable background delivery KJ: \(unwrappedError)")
         }
         if success {
             print("background delivery enabled KJ")
         }
     }


     let query = HKObserverQuery(sampleType: KJQuantityType, predicate: nil) { (query, completionHandler, error) in


        self.updateKJandSteps() {
             completionHandler()
         }


     }
     healthStore.execute(query)
 }