Watchkit 如何在watchOS 3+；不使用训练课程

我希望通过watchkit扩展程序以编程方式收集用户的心率，但在训练过程中，不

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据我所知，如果用户在移动，watchOS 3+不会采集心率：但是，只要他休息一段时间（10分钟？），我想通过HealthKit API以某种方式获取当前的bpm值

由于您有一个配套的iPhone应用程序，您可以从那里查询心率更新

• 你只需要有一个iPhone和一对苹果手表（这是 （显而易见）
• 默认的Apple Watch心率监视器应用程序会更新HealthKit 仅当数据位于前台时，才立即显示数据
• 当默认的Apple Watch心率监视器应用程序处于 背景，每隔9-10天更新HealthKit数据 分钟。 此代码应完成以下工作：

  import UIKit
  import HealthKit
  
  class ViewController: UIViewController {
  @IBOutlet weak var heartRateLabel: UILabel!
  @IBOutlet weak var timeStampLabel: UILabel!
  
  var hkStore: HKHealthStore?
  let heartRateUnit: HKUnit = HKUnit.count().unitDivided(by: .minute())
  var healthStore: HKHealthStore?
  override func viewDidLoad() {
      super.viewDidLoad()
      healthStore = HKHealthStore()
      let sampleTypes = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.heartRate)!
  
      healthStore?.requestAuthorization(toShare: [sampleTypes], read: [sampleTypes], completion: { (success, error) in
          if (error != nil) {
              print(error!.localizedDescription)
          }
      })
  
      getSamples()
  }
  func getSamples() {
      let heartrate = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.heartRate)
      let sort = [
          NSSortDescriptor(key: HKSampleSortIdentifierStartDate, ascending: false)
      ]
      let sampleQuery = HKSampleQuery(sampleType: heartrate!, predicate: nil, limit: 1, sortDescriptors: sort, resultsHandler: { [unowned self] (query, results, error) in
          if let results = results as? [HKQuantitySample]
          {
              let sample = results[0] as HKQuantitySample
              let value = sample.quantity.doubleValue(for: self.heartRateUnit)
              let rate = results[0]
              print(value, rate)
              self.updateHeartRate(samples: results)
          }
      })
      healthStore?.execute(sampleQuery)
  }
  
  func updateHeartRate(samples: [HKSample]?) {
      guard let heartRateSamples = samples as? [HKQuantitySample] else {return}
      DispatchQueue.main.async {
          guard let sample = heartRateSamples.first else{return}
          let value = sample.quantity.doubleValue(for: self.heartRateUnit)
          self.heartRateLabel.text = String(UInt16(value))
          let date = sample.startDate
          let dateFormatter = DateFormatter()
          dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss"
          self.timeStampLabel.text = dateFormatter.string(from: date)
       }
   }
  }
  

请注意，需要定期激发查询