UIWindow
UIWindow is a subclass of UIView that represents a window in an iOS application using UIKit. It serves as the top-level container for an app’s visible content and participates in the event handling system by acting as the primary receiver of touch and other events within its window scene. Since iOS 13, windows are associated with a window scene (UIScene), allowing multiple windows across scenes within a single app.
A window typically hosts a rootViewController, which manages the content and view hierarchy presented in that
Key properties include rootViewController, windowScene, screen, isHidden, windowLevel, frame, bounds, alpha, and backgroundColor. Important methods include
In practice, developers create a UIWindow, associate it with a windowScene, assign a rootViewController, and call
Overall, UIWindow provides the top-level context for rendering and event dispatch in an iOS application, forming