How can I make condition works whether my app should use App protocol or AppDelegate with SceneDelegate

Question

I want control my user device if they got (iOS 14.0, *), if that condition is true I want use App protocol, if the user device is lower than 14.0 but it has (iOS 13.0, *) then I want use AppDelegate with SceneDelegate, here what I did, I cannot code from (iOS 13.0, *) if I chose SwiftUI-life-cycle, because the App protocol need (iOS 14.0, *), then I end up to creating a UIKit-life-cycle to be able code for (iOS 13.0, *), so far so good, but I want control the user device in my UIKit-life-cycle app if they have (iOS 14.0, *), if that is true I want change the logic of my app to use App protocol instead of AppDelegate with SceneDelegate, is it possible to do such thing?

Here I add this below code as a file to my project in the same time the AppDelegate and SceneDelegate exist:

import SwiftUI

@available(iOS 14.0, *)
@main
struct MyTestApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

error:

'main()' is only available in iOS 14.0 or newer

How can I make my app smart to know that for (iOS 13.0, *) to < (iOS 14.0, *) should use AppDelegate and SceneDelegate and for (iOS 14.0, *) should use App protocol.

Does this answer your question https://stackoverflow.com/a/62935735/12299030? — Asperi, Jan 17 '22 at 19:09
@Asperi: Thanks I am getting `1 duplicate symbol for architecture x86_64` error, it does not build — ios coder, Jan 17 '22 at 19:28

How can I make condition works whether my app should use App protocol or AppDelegate with SceneDelegate

0 Answers0