iOS使用日期和自定义时间将心率bpm值保存到Healthkit

我正在使用此代码将心率值保存到Healthkit

       let heartRateCountUnit = HKUnit.count()
   
       let beatsPerMinuteQuantity = HKQuantity(unit: heartRateCountUnit.unitDivided(by: HKUnit.minute()), doubleValue: Double(heartRate))
      
       let beatsPerMinuteType = HKQuantityType.quantityType(forIdentifier: .heartRate)!

       let heartRateSampleData = HKQuantitySample(type: beatsPerMinuteType, quantity: beatsPerMinuteQuantity, start: Date(), end: Date())

       healthKitDataStore?.save([heartRateSampleData]) { (success: Bool, error: Error?) in
        completion (success)
            if success {
               print("Heart rate \(heartRate) saved.")
            }
            else {
                print("Error")
            }
       }
       

如何在保存时添加自定义时间，例如时间选择器的时间