---
title: UITraitCollection.TraitMutations
framework: uikit
role: symbol
role_heading: Type Alias
path: uikit/uitraitcollection/traitmutations
---

# UITraitCollection.TraitMutations

## Declaration

```swift
typealias TraitMutations = (inout any UIMutableTraits) -> Void
```

## See Also

### Modifying traits

- [init(mutations:)](uikit/uitraitcollection/init(mutations:).md)
- [modifyingTraits(_:)](uikit/uitraitcollection/modifyingtraits(_:).md)