---
title: NSLayoutDimension
framework: uikit
role: symbol
role_heading: Class
path: uikit/nslayoutdimension
---

# NSLayoutDimension

A factory class for creating size-based layout constraint objects using a fluent API.

## Declaration

```swift
@MainActor class NSLayoutDimension
```

## Overview

Overview Use these constraints to programmatically define your layout using Auto Layout. All sizes are measured in points. In addition to providing size-specific methods for creating constraints, this class adds type information to the methods inherited from NSLayoutAnchor. Specifically, the generic methods declared by NSLayoutAnchor must now take a matching NSLayoutDimension object. For more information on using layout anchors, see NSLayoutAnchor.

## Topics

### Building constraints

- [constraint(equalTo:multiplier:)](uikit/nslayoutdimension/constraint(equalto:multiplier:).md)
- [constraint(equalTo:multiplier:constant:)](uikit/nslayoutdimension/constraint(equalto:multiplier:constant:).md)
- [constraint(equalToConstant:)](uikit/nslayoutdimension/constraint(equaltoconstant:).md)
- [constraint(greaterThanOrEqualTo:multiplier:)](uikit/nslayoutdimension/constraint(greaterthanorequalto:multiplier:).md)
- [constraint(greaterThanOrEqualTo:multiplier:constant:)](uikit/nslayoutdimension/constraint(greaterthanorequalto:multiplier:constant:).md)
- [constraint(greaterThanOrEqualToConstant:)](uikit/nslayoutdimension/constraint(greaterthanorequaltoconstant:).md)
- [constraint(lessThanOrEqualTo:multiplier:)](uikit/nslayoutdimension/constraint(lessthanorequalto:multiplier:).md)
- [constraint(lessThanOrEqualTo:multiplier:constant:)](uikit/nslayoutdimension/constraint(lessthanorequalto:multiplier:constant:).md)
- [constraint(lessThanOrEqualToConstant:)](uikit/nslayoutdimension/constraint(lessthanorequaltoconstant:).md)

## Relationships

### Inherits From

- [NSLayoutAnchor](uikit/nslayoutanchor.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Layout guides

- [UILayoutGuide](uikit/uilayoutguide.md)