---
title: serviceRegistrationUpdateHandler
framework: network
role: symbol
role_heading: Instance Property
path: network/nwlistener/serviceregistrationupdatehandler
---

# serviceRegistrationUpdateHandler

A handler that receives updates for the service endpoint being advertised.

## Declaration

```swift
@preconcurrency final var serviceRegistrationUpdateHandler: (@Sendable (NWListener.ServiceRegistrationChange) -> Void)? { get set }
```

## See Also

### Advertising Bonjour Services

- [NSBonjourServices](bundleresources/information-property-list/nsbonjourservices.md)
- [NSLocalNetworkUsageDescription](bundleresources/information-property-list/nslocalnetworkusagedescription.md)
- [service](network/nwlistener/service-swift.property.md)
- [NWListener.Service](network/nwlistener/service-swift.struct.md)
- [NWListener.ServiceRegistrationChange](network/nwlistener/serviceregistrationchange.md)