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# serviceConnectionWithName:rootObject:usingNameServer:

Creates and returns a new connection object representing a vended service on the specified port name server.

```
+ (instancetype) serviceConnectionWithName:(NSString *) name rootObject:(id) root usingNameServer:(NSPortNameServer *) server;
```

## Parameters

`name`

The name of the service you want to publish.

`root`

The object to use as the root object for the published service. This is the object vended by the connection.

`server`

The port name server with which to register your service.

## Return Value

An `NSConnection` object representing the vended service or `nil` if there was a problem setting up the connection object.

## Discussion

This method creates the server-side of a connection object and registers it with the specified port name server. Clients wishing to connect to this service can request a communications port from the same port server and use that port to communicate.

If the specified service name corresponds to a service that is autolaunched by `launchd`, this method allows the service to check in with the `launchd` process. If the service is not autolaunched by `launchd`, this method registers the new connection with the specified name. For more information about `launchd` and its role in launching services, see [Daemons and Services Programming Guide](https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/Introduction.html#//apple_ref/doc/uid/10000172i)

## See Also

[`+ (instancetype) connectionWithRegisteredName:(NSString *) name host:(NSString *) hostName usingNameServer:(NSPortNameServer *) server;`](/documentation/Foundation/NSConnection/connectionWithRegisteredName:host:usingNameServer:)

Returns the `NSConnection` object whose send port links it to the `NSConnection` object registered under a given name with a given server on a given host.


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