---
title: firstItem
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nslayoutconstraint/firstitem
---

# firstItem

The first object participating in the constraint.

## Declaration

```swift
unowned(unsafe) var firstItem: AnyObject? { get }
```

## See Also

### Accessing constraint data

- [firstAttribute](appkit/nslayoutconstraint/firstattribute.md)
- [relation](appkit/nslayoutconstraint/relation-swift.property.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)