Migrating a Single-View Objective-C Application to the UIKit Scene-Based Life Cycle

Hello! I've been using Objective-C to write a single-view application and have been using AppDelegate for my window setup.

However, with the next release of iOS, I need to adopt SceneDelegate into my app for it to work.

I'm having trouble getting my main ViewController to show up when the app starts. It just shows up as a black screen.

I built this app entirely programmatically. When I go into my info.plist file, I have everything but the Storyboard setup since, obviously, I don't have one.

I've left my code below.

Thank you!

My current AppDelegate:

#import "ViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


#pragma mark - UISceneSession Configuration

- (UISceneConfiguration *)application:(UIApplication *)application configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession options:(UISceneConnectionOptions *)options {
    
    // Create the configuration object
    return [[UISceneConfiguration alloc] initWithName: @"Default" sessionRole: connectingSceneSession.role];
}

#pragma mark - Application Configuration

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    return YES;
}

- (void) dealloc {
    [super dealloc];
}

@end

My Current SceneDelegate:

#import "SceneDelegate.h"
#import "ViewController.h"

@interface SceneDelegate ()

@end

@implementation SceneDelegate

- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
    // Ensure we have a UIWindowScene
    if (![scene isKindOfClass:[UIWindowScene class]]) {
        return;
    }
    UIWindowScene *windowScene = (UIWindowScene *)scene;

    // Create and attach the window to the provided windowScene
    self.window = [[UIWindow alloc] initWithWindowScene:windowScene];

    // Set up the root view controller
    ViewController *homeViewController = [[[ViewController alloc] init] autorelease];
    UINavigationController *navigationController = [[[UINavigationController alloc] initWithRootViewController: homeViewController] autorelease];

    // Present the window
    self.window.rootViewController = navigationController;
    [self.window makeKeyAndVisible];
}

@end