Restoring macOS window size after close using SwiftUI WindowsGroup

Question

By default, on a macOS app using SwiftUI the window size is not restored after the window is closed.

Is there a way to keep whatever size & position the user gave before closing the app. Essentially I'd like close & open to behave in the same way to when the user quits & opens the app?

Is there something that should be added here?

import SwiftUI

@main
struct testApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

Answer 1

I find out a way to work around this case by instead of closing this window we will show/hide it.

Here is how I did in my app

@main
struct PulltodoApp: App {
    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
}

class AppDelegate: NSObject, NSApplicationDelegate, NSWindowDelegate {

    func applicationDidFinishLaunching(_ notification: Notification) {
        let mainWindow = NSApp.windows[0]
        mainWindow?.delegate = self
    }
    func windowShouldClose(_ sender: NSWindow) -> Bool {
        NSApp.hide(nil)
        return false
    }
}