A set of mathods to manage shared behaviors for your app

앱의 공유 동작들을 관리하는 메서드 집합

Apple Developer Documentation

Declaration

@MainActor protocol UIApplicationDelegate

Overview

Your app delegate object manages your app’s shared behaviors. The app delegate is effectively the root object of your app, and it works in conjunction with UIApplication to manage some interactions with the system. Like the UIApplication object, UIKit creates your app delegate object early in your app’s launch cycle so it’s always present.

Use your app delegate object to handle the following tasks:

• Initializing your app’s central data structures
• Configuring your app’s scenes
• Responding to notifications originating from outside the app, such as low-memory warnings, download completion notifications, and more
• Responding to events that target the app itself, and aren’t specific to your app’s scenes, views, or view controllers
• Registering for any required services at launch time, such as Apple Push Notification service

For more information about how you use the app delegate object to initialize your app at launch time, see Responding to the Launch of Your App.

• Application Delegate 는 앱의 공유 동작을 관리
• App delegate는 앱의 root object이며 시스템과 일부 상호 작용을 관리함
• UIKit은 앱 실행 주기 초기에 앱 Delegate Object를 생성하여 항상 존재하도록 함

Application Delegate Tasks

• 앱의 중앙 데이터 구조 초기화