Opening view controller from app delegate using swift

Question

I am trying to create a push notification which determines which view to open according to information obtained from the push.

I have managed to get the information from the push, but I am now struggling to get the view to open

Looking at other stack overflow questions I have the following currently:

App Delegate Did finish loading:

     //Extract the notification data     if let notificationPayload = launchOptions?[UIApplicationLaunchOptionsRemoteNotificationKey] as? NSDictionary {         // Get which page to open         let viewload = notificationPayload["view"] as? NSString         let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)         //Load correct view         if viewload == "circles" {              var viewController = self.window?.rootViewController?.storyboard?.instantiateViewControllerWithIdentifier("Circles") as! UIViewController             self.window?.rootViewController = viewController                          }     } 

Currently this is failing on the var ViewController = self... line.

Answer 1

You have to set ViewController StoryBoardId property as below image.

open viewController using coding as below in swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {           let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)          let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier("Circles") as UIViewController          self.window = UIWindow(frame: UIScreen.main.bounds)          self.window?.rootViewController = initialViewControlleripad          self.window?.makeKeyAndVisible()           return true     } 

For iOS 13+ (based on an article by dev2qa)
Open SceneDelegate.swift and add following

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {      // If this scene's self.window is nil then set a new UIWindow object to it.     self.window = self.window ?? UIWindow()      // Set this scene's window's background color.     self.window!.backgroundColor = UIColor.red      // Create a ViewController object and set it as the scene's window's root view controller.     self.window!.rootViewController = ViewController()      // Make this scene's window be visible.     self.window!.makeKeyAndVisible()      guard scene is UIWindowScene else { return } } 

There is an open-source navigation utility which attempts to make this easier. Example