API reference: UIKit. Query for UIView, UIViewController, controls, table and collection views, navigation controllers, scenes, Auto Layout, images, colors, gestures, presentation, and SwiftUI hosting.

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.