<!--
{
  "availability" : [
    "iOS: 15.4.0 -",
    "iPadOS: 15.4.0 -",
    "macCatalyst: 15.4.0 -",
    "macOS: 13.0.0 -",
    "visionOS: -",
    "watchOS: 8.5.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "HealthKit",
  "identifier" : "/documentation/HealthKit/HKActivitySummaryQueryDescriptor/init(predicate:)",
  "metadataVersion" : "0.1.0",
  "role" : "Initializer",
  "symbol" : {
    "kind" : "Initializer",
    "modules" : [
      "HealthKit"
    ],
    "preciseIdentifier" : "s:9HealthKit32HKActivitySummaryQueryDescriptorV9predicateACSo11NSPredicateCSg_tcfc"
  },
  "title" : "init(predicate:)"
}
-->

# init(predicate:)

Instantiates an activity summary query descriptor.

```
init(predicate: NSPredicate?)
```

## Parameters

`predicate`

A predicate that limits the results that the query returns. For a list of convenience methods for building predicates, see [`HKQuery`](/documentation/HealthKit/HKQuery).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)