I have the following declaration in my AppDelegate.swift file.
var window: UIWindow?
and I want to include it only when the deployment target is set to below iOS 13.0. I have looked at
@available(...)
attribute but I don't think it can do what I want. Essentially I want to be able to build my project for iOS 12 or iOS 13 with the minimum number of changes to my project in AppDelegate.swift and SceneDelegate.swift. I have made changes already to AppDelegate.swift and SceneDelegate.swift using @available(iOS 13.0, *) and #available(iOS 13.0, *) but I still need to be able to exclude this other declaration when the deployment target is above iOS 12.
Here is my AppDelegate.swift file:
import UIKit
import Firebase
@main
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow? // only include for builds < iOS 13.0
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
if #available(iOS 13.0, *) {
// Do nothing
} else {
window = UIWindow() // only include for builds < iOS 13.0
window?.rootViewController = UINavigationController(rootViewController: LoginController()) // only include for builds < iOS 13.0
window?.makeKeyAndVisible() // only include for builds < iOS 13.0
}
FirebaseApp.configure()
return true
}
// MARK: UISceneSession Lifecycle
@available(iOS 13.0, *)
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)
}
@available(iOS 13.0, *)
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.
}
}
and here is my SceneDelegate.swift file:
import UIKit
@available(iOS 13.0, *)
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let scene = (scene as? UIWindowScene) else { return }
window = UIWindow(windowScene: scene)
window?.rootViewController = UINavigationController(rootViewController: LoginController())
window?.makeKeyAndVisible()
}
// ...
}
Essentially all I want to have happen is I just change the deployment target and the appropriate bits of code get included or excluded in the build process.
