Add custom view controller as root view controller in my mac application? - swift

Question

I already checked most of the answers to this question but mostly are for Cocoa Touch. I need to implement this in my appdelegate for mac application.
Once user is logged-in he will be redirected to the main screen else go to login screen.
let controller:NSWindowController = NSWindowController()
let viewController:NSViewController
let storyboard = NSStoryboard.init(name: "Main", bundle: nil)
let stringLoginStatus = NSUserDefaults.standardUserDefaults().objectForKey(Constants.Key_LoginStatus) as? String
if stringLoginStatus != nil
{
if stringLoginStatus == "true"
{
viewController = storyboard.instantiateControllerWithIdentifier("Channel") as! NSViewController
}
else{
viewController = storyboard.instantiateControllerWithIdentifier("ViewController") as! NSViewController
}
}
else{
viewController = storyboard.instantiateControllerWithIdentifier("ViewController") as! NSViewController
}
controller.window?.contentViewController = viewController
controller.window?.makeKeyAndOrderFront(self)
It shows and error as controller is not being initialized.

Answer 1

try this code to change your view controller:-
UIApplication.appWindow.rootViewController = UIStoryboard.main.instantiateViewController(withIdentifier: "customViewControl")
//MARK: Make UIApplication extension to get appWindow
extension UIApplication {
class var appWindow: UIWindow! {
return (UIApplication.shared.delegate?.window!)!
}
}
//MARK: Make Storyboard extension to get main screen
extension UIStoryboard {
class var main: UIStoryboard {
let storyboardName: String = Bundle.main.object(forInfoDictionaryKey: "UIMainStoryboardFile") as! String
return UIStoryboard(name: storyboardName, bundle: nil)
}
}