---
title: "accessory(_:didUpdateAssociatedServiceTypeFor:)"
framework: homekit
role: symbol
role_heading: Instance Method
path: "homekit/hmaccessorydelegate/accessory(_:didupdateassociatedservicetypefor:)"
---

# accessory(_:didUpdateAssociatedServiceTypeFor:)

Informs the delegate when the associated service type of a service is modified.

## Declaration

```swift
optional func accessory(_ accessory: HMAccessory, didUpdateAssociatedServiceTypeFor service: HMService)
```

## Parameters

- `accessory`: The accessory.
- `service`: The service with a changed service type.

## See Also

### Observing accessories

- [accessoryDidUpdateName(_:)](homekit/hmaccessorydelegate/accessorydidupdatename(_:).md)
- [accessoryDidUpdateReachability(_:)](homekit/hmaccessorydelegate/accessorydidupdatereachability(_:).md)
- [accessoryDidUpdateServices(_:)](homekit/hmaccessorydelegate/accessorydidupdateservices(_:).md)
- [accessory(_:didUpdateNameFor:)](homekit/hmaccessorydelegate/accessory(_:didupdatenamefor:).md)
- [accessory(_:service:didUpdateValueFor:)](homekit/hmaccessorydelegate/accessory(_:service:didupdatevaluefor:).md)
- [accessory(_:didAdd:)](homekit/hmaccessorydelegate/accessory(_:didadd:).md)
- [accessory(_:didRemove:)](homekit/hmaccessorydelegate/accessory(_:didremove:).md)
- [accessory(_:didUpdateFirmwareVersion:)](homekit/hmaccessorydelegate/accessory(_:didupdatefirmwareversion:).md)