uikit

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