---
title: onInterruption
framework: extensionfoundation
role: symbol
role_heading: Instance Property
path: extensionfoundation/appextensionprocess/configuration/oninterruption
---

# onInterruption

The closure to run if the app extension’s process exits unexpectedly.

## Declaration

```swift
var onInterruption: () -> Void
```

## Discussion

Discussion Use your closure to respond to the loss of the app extension process. For example, use it to try and reestablish connection to the app extension or to remove the app extension from the list of active extensions.