Can't Call Segue By Identifier from AppDelegate

Question

So I have a segue from ViewController to SecondViewController. This segue is triggered by a UIButton in ViewController and the modally presents SecondViewController. The Segue's Identifier is set ("SegueIdentifier") and I am able to call the segue programatically from within my ViewController.

When I try to do the same in my AppDelegate, I get the error that the compiler can't find a segue with the Identifier I set.

let viewController = ViewController()            
viewController.performSegueWithIdentifier("SegueIdentifier", sender: nil)

Again, I literally copied and pasted the performSegueWithIdentifier method call from the aforementioned method in ViewController in which I also call performSegueWithIdentifier for the same segue and it works.

Any ideas?

Answer 1

In my one project I am managing this situation like,

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.

NSString *identifier;
BOOL isSaved = [[NSUserDefaults standardUserDefaults] boolForKey:@"loginSaved"];
if (isSaved)
{
    identifier=@"home1";



}
else
{
    identifier=@"dis1";
}
UIStoryboard *    storyboardobj=[UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *screen = [storyboardobj instantiateViewControllerWithIdentifier:identifier];



[self.window setRootViewController:screen];


return YES;
}

It is in objective c and just for reference. If it can help you :)

Update :

In swift something like,

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {



    var identifier: String = String()

    let isSaved = NSUserDefaults.standardUserDefaults().boolForKey("loginsaved")


    if isSaved

    {
        identifier = "home1"
    }
    else{

        identifier = "dis1"
    }

    let storyboardobj: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let screen: UIViewController = storyboardobj.instantiateViewControllerWithIdentifier(identifier)
    self.window!.rootViewController = screen

    // Override point for customization after application launch.
    return true
}

Hope this will help :)