Question

    let endDate = NSDate()
    let startDate = NSDate()
    let v : Float?
    let stepsCount:HKQuantityType = HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)!
    let predicate:NSPredicate = HKQuery.predicateForSamplesWithStartDate(startDate, endDate: endDate, options: .None)

    let query = HKQuantitySample(sampleType: stepsCount, predicate: predicate, limit: 1, sortDescriptors: nil, resultsHandler: {
        (query, results, error) in
        if results == nil {
            print(error)
        }
        v = result.first.Quantity

    })
    healthStore.executeQuery(query)

找不到类型＆＃39; HKQuantitySample＆＃39;的初始化程序。接受类型＆＃39;的参数列表（sampleType：HKQuantityType，谓词： NSPredicate，limit：Int，sortDescriptors：nil，resultsHandler：（_，_， _） - ＆gt; _）＆＃39;

Answer 1

只需将HKQuantitySample替换为HKSampleQuery即可。

有关更多信息，请参阅THIS教程。

您可以在这里找到示例代码：

func readMostRecentSample(sampleType:HKSampleType , completion: ((HKSample!, NSError!) -> Void)!)
{

  // 1. Build the Predicate
  let past = NSDate.distantPast() as! NSDate
  let now   = NSDate()
  let mostRecentPredicate = HKQuery.predicateForSamplesWithStartDate(past, endDate:now, options: .None)

  // 2. Build the sort descriptor to return the samples in descending order
  let sortDescriptor = NSSortDescriptor(key:HKSampleSortIdentifierStartDate, ascending: false)
  // 3. we want to limit the number of samples returned by the query to just 1 (the most recent)
  let limit = 1

  // 4. Build samples query
  let sampleQuery = HKSampleQuery(sampleType: sampleType, predicate: mostRecentPredicate, limit: limit, sortDescriptors: [sortDescriptor])
    { (sampleQuery, results, error ) -> Void in

      if let queryError = error {
        completion(nil,error)
        return;
      }

      // Get the first sample
      let mostRecentSample = results.first as? HKQuantitySample

      // Execute the completion closure
      if completion != nil {
        completion(mostRecentSample,nil)
      }
  }
  // 5. Execute the Query
  self.healthKitStore.executeQuery(sampleQuery)
}

Answer 2

文档没有讨论任何初始化程序，例如您提供的初始化程序...甚至查看了Beta文档，但没有发现任何关于您要调用的文档。

请在此处查看现有的HKQuantitySample初始化程序：

https://developer.apple.com/library/ios/documentation/HealthKit/Reference/HKQuantitySample_Class/

请参阅Dharmesh Kheni关于创建查询的正确方法的答案：）。

找不到类型的初始值设定项

2 个答案: