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# NSUIViewToolbarItem

An item in a window’s toolbar that hosts a custom UIKit view.

```
class NSUIViewToolbarItem
```

## Overview

The [`NSUIViewToolbarItem`](/documentation/UIKit/NSUIViewToolbarItem) class lets you display a [`UIView`](/documentation/UIKit/UIView) in an <doc://com.apple.documentation/documentation/AppKit/NSToolbar>. Use this class if you have a custom UIKit view you want to appear as a control in a toolbar when you build your app with Mac Catalyst.

For UIKit controls that support behavioral styles, set [`preferredBehavioralStyle`](/documentation/UIKit/UIButton/preferredBehavioralStyle) to [`UIBehavioralStyle.mac`](/documentation/UIKit/UIBehavioralStyle/mac) if you want them to appear in the toolbar with the appearance and behavior of AppKit controls.

## Topics

### Creating a toolbar item

[`init(itemIdentifier: NSToolbarItem.Identifier, uiView: UIView)`](/documentation/UIKit/NSUIViewToolbarItem/init(itemIdentifier:uiView:))

Creates a toolbar item with the identifier and underlying UIKit view you specify.

### Managing the view

[`var uiView: UIView`](/documentation/UIKit/NSUIViewToolbarItem/uiView)

The UIKit view to host in an AppKit toolbar.

## Relationships

### Conforms To

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`CVarArg`](/documentation/Swift/CVarArg)

[`UIPopoverPresentationControllerSourceItem`](/documentation/UIKit/UIPopoverPresentationControllerSourceItem)

[`Equatable`](/documentation/Swift/Equatable)

[`NSCopying`](/documentation/Foundation/NSCopying)

### Inherits From

[`NSToolbarItem`](/documentation/AppKit/NSToolbarItem)

---

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