<!--
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  "identifier" : "/documentation/WatchKit/WKExtensionDelegate/handle(_:)-92ulv",
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  "role" : "Instance Method",
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  "title" : "handle(_:)"
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# handle(_:)

Tells the delegate that the app has received one or more background tasks.

```
optional func handle(_ backgroundTasks: Set<WKRefreshBackgroundTask>)
```

## Parameters

`backgroundTasks`

A set containing one or more background tasks.

## Discussion

The system calls this method after launching your app to handle a background task. Use this method to handle the specified tasks. Call each tasks’s [`setTaskCompletedWithSnapshot(_:)`](/documentation/WatchKit/WKRefreshBackgroundTask/setTaskCompletedWithSnapshot(_:)) method as soon as the task is complete. For more information on background tasks, see [Using background tasks](/documentation/WatchKit/using-background-tasks).

## See Also

  <doc://com.apple.documentation/documentation/HealthKit/HKHealthStore/recoverActiveWorkoutSession(completion:)>


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