[iOS] StoryBoard를 사용하지 않는 경우

StoryBoard를 사용하지 않는 경우

---

 storyboard를 사용하지 않고 인터페이스를 생성하고 싶을 땐 AppDelegate 혹은 SceneDelegate에서 window를 직접 생성해주어야 한다.

 

 우선 Main.storyboard를 삭제해준다.

LaunchScreen만 남겨둠

 

1.  AppDelegate에서 window 생성

---

 iOS 13 이상의 OS에서 AppDelegate에서 window 생성 시엔

application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration

 

application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>)

 이 2가지 함수를 삭제 해준다.

 

 그리고 info.plist 파일에서 SceneConfiguration 항목을 지워준다.

해당 부분을 삭제

 그리고 didFinishLaunchingWithOptions 메서드에서 window 객체 생성 후 rootViewController 지정, 그리고 makeKeyAndVisible() 함수를 실행해준다.

//
//  AppDelegate.swift
//  WebSocket
//
//  Created by 박준현 on 2022/01/22.
//

import UIKit

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        window = UIWindow(frame: UIScreen.main.bounds)
        let navVC = UINavigationController(rootViewController: ViewController())
        navVC.isNavigationBarHidden = true
        window?.rootViewController = navVC
        
        window?.makeKeyAndVisible()
        
        return true
    }

    // MARK: UISceneSession Lifecycle
/* 아래에 있는 sceneDelegate 코드를 삭제해야한다.
    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
        // Called when a new scene session is being created.
        // Use this method to select a configuration to create the new scene with.
        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
    }

    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
        // Called when the user discards a scene session.
        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
    }

*/
}

 

2. SceneDelegate에서 window생성

---

  willConnectTo 메서드에서 window 객체에 windowScene을 지정 후에 객체를 생성하고 AppDelegate에서 생성 방식과 동일하게 생성해준다.

//
//  SceneDelegate.swift
//  Practice
//
//  Created by 박준현 on 2021/11/28.
//

import UIKit

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
        
        if let window = scene as? UIWindowScene {
            self.window = UIWindow(windowScene: window)

            let viewController = ViewController()
            let navVC = UINavigationController(rootViewController: viewController )
            navVC.isNavigationBarHidden = true
            self.window?.rootViewController = navVC
            self.window?.makeKeyAndVisible()
        }
        guard let _ = (scene as? UIWindowScene) else { return }
        
    }

    func sceneDidDisconnect(_ scene: UIScene) {
        // Called as the scene is being released by the system.
        // This occurs shortly after the scene enters the background, or when its session is discarded.
        // Release any resources associated with this scene that can be re-created the next time the scene connects.
        // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
    }

    func sceneDidBecomeActive(_ scene: UIScene) {
        // Called when the scene has moved from an inactive state to an active state.
        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
    }

    func sceneWillResignActive(_ scene: UIScene) {
        // Called when the scene will move from an active state to an inactive state.
        // This may occur due to temporary interruptions (ex. an incoming phone call).
    }

    func sceneWillEnterForeground(_ scene: UIScene) {
        // Called as the scene transitions from the background to the foreground.
        // Use this method to undo the changes made on entering the background.
    }

    func sceneDidEnterBackground(_ scene: UIScene) {
        // Called as the scene transitions from the foreground to the background.
        // Use this method to save data, release shared resources, and store enough scene-specific state information
        // to restore the scene back to its current state.
    }


}