Preparing your UI to run in the foreground
Configure your app to appear onscreen.
Preparing your UI to run in the background
Prepare your app to be suspended.
API Collection
Scenes
Manage multiple instances of your app’s UI simultaneously, and direct resources to the appropriate instance of your UI.
Overview
UIKit manages each instance of your app’s UI using a UIWindow object. A scene contains the windows and view controllers for presenting one instance of your UI. Each scene also has a corresponding UIWindow object, which you use to coordinate interactions between UIKit and your app. Scenes run concurrently with each other, sharing the same memory and app process space. As a result, a single app may have multiple scenes and scene delegate objects active at the same time.
Manage the configuration of new scenes from your UIApplication object.
Topics
Supporting multiple windows on iPad
Support side-by-side instances of your app’s interface and create new windows.
protocol UIWindowSceneDelegate Additional methods that you use to manage app-specific tasks occurring in a scene.
class UIWindowScene A scene that manages one or more windows for your app.
class UIScene An object that represents one instance of your app’s user interface.
protocol UISceneDelegate The core methods you use to respond to life-cycle events occurring within a scene.
Specifying the scenes your app supports
Tell the system about your app’s scenes, including the objects you use to manage each scene and its initial user interface.
UIApplicationSceneManifest The information about the app’s scene-based life-cycle support.
class UISceneConfiguration Information about the objects and storyboard for UKit to use when creating a particular scene.
class UISceneSession An object that contains information about one of your app’s scenes.
class UISceneActivationConditions The set of conditions that define when UIKit activates the current scene.
class ActivationRequestOptions An object that contains information you want the system to use when activating the session associated with a scene.
class UIWindowSceneDestructionRequestOptions An object that contains information to use when removing a window scene from your app.
class UISceneDestructionRequestOptions An object you pass to UIKit to permanently remove a scene and its associated session from your app.
class UIOpenURLContext A system-provided object that contains the information you need to open a single URL.
class OpenExternalURLOptions Options you specify when asking a scene to open a URL.
enum Code Error codes for issues with scenes.
struct UISceneError Errors returned during the creation or management of a scene.
let UISceneErrorDomain : String The domain for scene-related errors.
See Also
Managing your app’s life cycle
Respond to system notifications when your app is in the foreground or background, and handle other significant system-related events.
Responding to the launch of your app
Initialize your app’s data structures, prepare your app to run, and respond to any launch-time requests from the system.
class UIApplication The centralized point of control and coordination for apps running in iOS.
protocol UIApplicationDelegate A set of methods to manage shared behaviors for your app.
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