uikit — Claude Code skill: what it does, how to install

---
name: uikit
user-invocable: true
description: "API reference: UIKit. Query for UIView, UIViewController, controls, table and collection views, navigation controllers, scenes, Auto Layout, images, colors, gestures, presentation, and SwiftUI hosting."
context: fork
agent: Explore
---

# UIKit Reference

UIKit framework documentation for iOS and iPadOS apps.

## Downloaded Reference Files

Search the local files first. `uikit-overview.md` is the full framework index and is large, so prefer `rg` over opening it directly.

| File | Content |
|------|---------|
| [uikit-overview.md](uikit-overview.md) | Full UIKit framework index |
| [uikit-updates.md](uikit-updates.md) | UIKit updates |
| [uiapplication.md](uiapplication.md) | UIApplication |
| [uiapplicationdelegate.md](uiapplicationdelegate.md) | UIApplicationDelegate |
| [uiwindowscene.md](uiwindowscene.md) | UIWindowScene |
| [uiview.md](uiview.md) | UIView |
| [uiviewcontroller.md](uiviewcontroller.md) | UIViewController |
| [uicontrol.md](uicontrol.md) | UIControl |
| [uibutton.md](uibutton.md) | UIButton |
| [uilabel.md](uilabel.md) | UILabel |
| [uiimage.md](uiimage.md) | UIImage |
| [uiimageview.md](uiimageview.md) | UIImageView |
| [uicolor.md](uicolor.md) | UIColor |
| [uifont.md](uifont.md) | UIFont |
| [uiscrollview.md](uiscrollview.md) | UIScrollView |
| [uitableview.md](uitableview.md) | UITableView |
| [uicollectionview.md](uicollectionview.md) | UICollectionView |
| [uistackview.md](uistackview.md) | UIStackView |
| [nslayoutconstraint.md](nslayoutconstraint.md) | NSLayoutConstraint |
| [uinavigationcontroller.md](uinavigationcontroller.md) | UINavigationController |
| [uitabbarcontroller.md](uitabbarcontroller.md) | UITabBarController |
| [uisplitviewcontroller.md](uisplitviewcontroller.md) | UISplitViewController |
| [uigesturerecognizer.md](uigesturerecognizer.md) | UIGestureRecognizer |
| [uialertcontroller.md](uialertcontroller.md) | UIAlertController |
| [uiactivityviewcontroller.md](uiactivityviewcontroller.md) | UIActivityViewController |
| [uivisualeffectview.md](uivisualeffectview.md) | UIVisualEffectView |
| [uiblureffect.md](uiblureffect.md) | UIBlurEffect |
| [uihostingcontroller.md](uihostingcontroller.md) | UIHostingController bridge from SwiftUI |
| [using-swiftui-with-uikit.md](using-swiftui-with-uikit.md) | Using SwiftUI with UIKit |

## Fetching More Docs

1. Search this skill's local `.md` files first.
2. If the topic is not here, check the other installed Apple skills you have available by their names, descriptions, or `SKILL.md` frontmatter, then grep their local files. This is faster and uses less context than fetching new docs from the internet.
3. If no installed skill has the page, use the relevant documentation path from `uikit-overview.md` with the `sosumi.ai` Markdown mirror. For example, `/documentation/uikit/uiview` maps to `https://sosumi.ai/documentation/uikit/uiview`.

Some UIKit-adjacent APIs live in other frameworks. For example, `UIHostingController` is documented under SwiftUI.