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# NSUserInterfaceValidations

A protocol that a custom class can adopt to manage the enabled state of a UI element.

```
protocol NSUserInterfaceValidations
```

## Overview

The [`NSUserInterfaceValidations`](/documentation/AppKit/NSUserInterfaceValidations) protocol works with the [`NSValidatedUserInterfaceItem`](/documentation/AppKit/NSValidatedUserInterfaceItem) protocol to allow the target of a user interface element such as a menu item or a toolbar item to decide whether or not the user interface element should be enabled.

Your custom classes should adopt this protocol if an instance may be the target of a user interface element and need to conditionally enable or disable the element based on the current state of the instance. For more details, read [User Interface Validation](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/UIValidation/UIValidation.html#//apple_ref/doc/uid/10000040i).

## Topics

### Validating user interface items

[`validateUserInterfaceItem(_:)`](/documentation/AppKit/NSUserInterfaceValidations/validateUserInterfaceItem(_:))

Returns a Boolean value that indicates whether the sender should be enabled.


---

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