---
title: "init(sidebarWithViewController:)"
framework: appkit
role: symbol
role_heading: Initializer
path: "appkit/nssplitviewitem/init(sidebarwithviewcontroller:)"
---

# init(sidebarWithViewController:)

Creates a split view item that represents a sidebar for the specified view controller.

## Declaration

```swift
convenience init(sidebarWithViewController viewController: NSViewController)
```

## Discussion

Discussion Sidebar items take advantage of the standard system appearance and behavior for sidebars, including: The translucent material background The ability to collapse and expand on split view size changes The ability to overlay at small split view sizes in full-screen mode Additionally, sidebars use standard system default values for these properties: canCollapse and isSpringLoaded are true minimumThickness and maximumThickness use the standard minimum and maximum sidebar size preferredThicknessFraction uses the standard fraction for sidebars (0.15)

## See Also

### Creating a split view item

- [init(contentListWithViewController:)](appkit/nssplitviewitem/init(contentlistwithviewcontroller:).md)
- [init(viewController:)](appkit/nssplitviewitem/init(viewcontroller:).md)
- [init(inspectorWithViewController:)](appkit/nssplitviewitem/init(inspectorwithviewcontroller:).md)