For many years, the AppDelegate was the undisputed central hub for managing an iOS app's lifecycle. It handled everything from launch to termination, push notifications, URL schemes, and even setting up the app's initial UI UIWindow. Then, with iOS 13 and the advent of multi-window support on iPadOS and Mac Catalyst, Apple introduced the SceneDelegate. This addition often creates confusion for developers, especially when working on projects that support older iOS versions or transitioning from legacy codebases.
In this article, we'll…
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