---
title: cancel()
framework: xpc
role: symbol
role_heading: Instance Method
path: xpc/xpclistener/cancel()
---

# cancel()

Cancels a listener.

## Declaration

```swift
func cancel()
```

## Discussion

Discussion Typically you don’t need to explicitly cancel a listener. When the server process exits, the system automatically cancels the listener. In rare circumstances, such as part of a testing infrastructure, you may want to cancel a listener to ensure it doesn’t receive any new messages. Be aware that canceling a listener causes peers attempting to connect to the service to hang.

## See Also

### Managing the life cycle

- [activate()](xpc/xpclistener/activate().md)