Value of type 'AppDelegate' has no member 'window'

Question

Im trying to use the 3D touch Quick Actions and I'm setting it up copying VEA Software code. In his sample code it works perfectly but when I try to add it to my app I get some unusual errors. I am new to coding and swift so please explain as much as possible. Thanks. Below I have the code which is in my app delegate.

This is where I'm getting the error (self.window?):

@available(iOS 9.0, *)
func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) -> Bool
{
var handled = false
var window: UIWindow?

guard ShortcutIdentifier(fullType: shortcutItem.type) != nil else { return false }
guard let shortcutType = shortcutItem.type as String? else { return false }

switch (shortcutType)
{
case ShortcutIdentifier.First.type:
    handled = true
    var window = UIWindow?()

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ProjectPage") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)


    break
case ShortcutIdentifier.Second.type:
    handled = true

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ContactPageView") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)
    break

case ShortcutIdentifier.Third.type:
    handled = true

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ViewController") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)
    break


default:
    break
}

return handled

}

Answer 1

Xcode 12.0 Swift 5.0

At the moment you need to:

1. Remove the “Application Scene Manifest” from info.plist file;
2. Remove scene delegate class;
3. Remove scene related methods in AppDelegate class;
4. If missing, add the property var window: UIWindow? to your AppDelegate class.

Add some logic in func application(_: UIApplication, didFinishLaunchingWithOptions _: [UIApplication.LaunchOptionsKey: Any]?).

Example of implementation when you need to support iOS 12 and 13:

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?

    func application(_: UIApplication, didFinishLaunchingWithOptions _: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        configureInitialViewController()
        return true
    }

    private func configureInitialViewController() {
        let initialViewController: UIViewController
        let storyboard = UIStoryboard(name: "Main", bundle: nil)

        window = UIWindow()

        if (condition) {
            let mainViewController = storyboard.instantiateViewController(withIdentifier: "mainForm")
            initialViewController = mainViewController
        } else {
            let loginViewController = storyboard.instantiateViewController(withIdentifier: "loginForm")
            initialViewController = loginViewController
        }
        window?.rootViewController = initialViewController
        window?.makeKeyAndVisible()
    }
}

Answer 2

In iOS 13, Xcode 11, the sceneDelegate handles the functionality of UIScene and window. The window performs properly when used in the sceneDelegate.