Sort HKSampleQuery items by Quantity

Question

I want to fetch HealthKit quantity data and sort them by quantity value. Is it possible?

I know I can filter them by using HKPredicateKeyPathQuantityin the NSPredicate but I can't find similar key for sorting

Example

let type = HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeight)
let sort = [
  NSSortDescriptor(key: HKSampleSortIdentifierStartDate, ascending: true),
  NSSortDescriptor(key: HKSampleSortIdentifierEndDate, ascending: true),

  //I want one more Sort Item here :(
  //NSSortDescriptor(key: SortIdentifierIdeQuantity, ascending: true)
]

let predicate = NSPredicate(format: "\(HKPredicateKeyPathStartDate) > %@ AND \(HKPredicateKeyPathStartDate) < %@ AND \(HKPredicateKeyPathQuantity) == %@",
  argumentArray:[start, end, value])

let query = HKSampleQuery(sampleType: type, predicate: predicate, limit: limit, sortDescriptors: sort) { query, res, error in
  completion(res, error)
}

healthKit.executeQuery(query)

}

Seems that you have to sort them after you've done the query. — Larme, Jul 29 '15 at 14:23
yea :( and that's not fun :( of course it's very easy though in swift `res.sort(SortFunc)` — Kostiantyn Koval, Jul 29 '15 at 16:07
@Larme It wouldn't work if you set a limit for fetching, then you need to fetch all items in the items you want, sort them, and get only that count as you want — Kostiantyn Koval, Jul 30 '15 at 08:13

score 1 · Answer 1 · answered Jul 29 '15 at 18:13

1

It is only possible to have HealthKit sort the results by date currently. You should file a bug with Apple for the enhancement that you'd like.

answered Jul 29 '15 at 18:13

Allan

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Sort HKSampleQuery items by Quantity

1 Answers1