---
title: relation
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nslayoutconstraint/relation-swift.property
---

# relation

The relation between the two attributes in the constraint.

## Declaration

```swift
var relation: NSLayoutConstraint.Relation { get }
```

## See Also

### Accessing constraint data

- [firstItem](appkit/nslayoutconstraint/firstitem.md)
- [firstAttribute](appkit/nslayoutconstraint/firstattribute.md)
- [secondItem](appkit/nslayoutconstraint/seconditem.md)
- [secondAttribute](appkit/nslayoutconstraint/secondattribute.md)
- [multiplier](appkit/nslayoutconstraint/multiplier.md)
- [constant](appkit/nslayoutconstraint/constant.md)
- [firstAnchor](appkit/nslayoutconstraint/firstanchor.md)
- [secondAnchor](appkit/nslayoutconstraint/secondanchor.md)