---
title: attribute
framework: quartzcore
role: symbol
role_heading: Instance Property
path: quartzcore/caconstraint/attribute
---

# attribute

The attribute the constraint affects.

## Declaration

```swift
var attribute: CAConstraintAttribute { get }
```

## See Also

### Accessing Constraint Values

- [offset](quartzcore/caconstraint/offset.md)
- [scale](quartzcore/caconstraint/scale.md)
- [sourceAttribute](quartzcore/caconstraint/sourceattribute.md)
- [sourceName](quartzcore/caconstraint/sourcename.md)