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# setExposureNotificationEnabled(_:completionHandler:)

Enables or disables exposure notification.

```
func setExposureNotificationEnabled(_ enabled: Bool, completionHandler: @escaping @Sendable ((any Error)?) -> Void)
```

```
func setExposureNotificationEnabled(_ enabled: Bool) async throws
```

## Parameters

`enabled`

A Boolean that enables or disables exposure notification.

`completionHandler`

The completion handler that the framework calls once exposure notification is enabled or disabled.

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> func setExposureNotificationEnabled(_ enabled: Bool) async throws
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

> Important:
> This method is available in iOS 12.5, and in iOS 13.5 and later.

If the user hasn’t authorized exposure notification, this method displays a user dialog requesting consent.

> Note:
> Using this method to disable exposure notification stops scanning and Bluetooth advertising, but diagnosis keys and data remain.

---

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