Access UITabBarController from swift code

amazed! Why do you need view controller if you want to load UITabBarController from viewDidLoad function of view controller??? However solution can be like this: You can make segue: right click in view controller then drag to tabBarController and select segue "show".

But, better would be if you embed UITabBarController to view controller which loads your TabBarController at the beginning of your app. 1: Select View Controller 2: Go to [Editor] in menu bar of xcode 3: Select Embed In 4: Select Tab Bar Controller

and you are done :)

other solution would be: delete the ViewController from storyboard select tabBarController that you added. go to "attribute inspector" in left pane and select "Is initial View Controller"

ADDED 1. Give identifier to TabBarController like given by 張家齊 2. Add button in ViewController and make Action of it in ViewController's class (to make action. right click the added button and drag to ViewController class and select Action instead of Outlet.) 3. Now add following codes in that action:

let storyBoard = UIStoryboard(name: "Main", bundle: nil) 
let vc = storyBoard.instantiateViewControllerWithIdentifier("myTabBarController") //vc is instance of TabBarController.
self.presentViewController(vc, animated: true, completion: nil)

DONE :)

In AppDelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let main = storyboard.instantiateViewControllerWithIdentifier("myTabBarController") as! myTabBarController

        self.window!.rootViewController = main
        self.window!.makeKeyAndVisible()

        return true
    }

And you should set Identifier of myTabBarController in your Main.storyboard.