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# handle(_:)

Processes a given incoming message on the port.

```
optional func handle(_ message: NSPortMessage)
```

## Parameters

`message`

An incoming port message.

## Discussion

See [`Port`](/documentation/Foundation/Port) for more information.

The delegate should implement either [`handle(_:)`](/documentation/Foundation/PortDelegate/handle(_:)) or the [`NSMachPortDelegate`](/documentation/Foundation/NSMachPortDelegate) protocol method [`handleMachMessage(_:)`](/documentation/Foundation/NSMachPortDelegate/handleMachMessage(_:)). You must not implement both delegate methods.

## See Also

  [Distributed Objects Programming Topics](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/DistrObjects/DistrObjects.html#//apple_ref/doc/uid/10000102i)


---

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