CODEWITHSUNDEEP
iosswiftxcodeuinavigationcontrolleruitabbarcontroller
Dan Levy
Dan Levy

Reputation: 4281

Presenting a tabBarController from code removes the navigation bar buttons and title

I am trying to present a tabBarController using code (not storyboard segue) when the app starts up. If a user is registered, the app should open on the tabBarVC and if a user needs to signup/login, the loginVC is presented. I call this in didFinishLaunchingWithOptions:

if currentUser != nil {

    initialVC("tabBarVC")

} else {

    initialVC("loginVC")

}

and the initialVC function is:

func initialVC(storyboardID: String) {

    let mainStoryboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let initialViewController : UIViewController = mainStoryboard.instantiateViewControllerWithIdentifier("\(storyboardID)") as UIViewController
    let navController = UINavigationController(rootViewController: initialViewController)
    self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
    self.window?.rootViewController = navController
    self.window?.makeKeyAndVisible()

}

When the tabBarViewController is presented, the nav bar buttons and titles don't show up. If I segue directly to a VC within the tabBarController, the nav bar shows correctly, but the tab bar isn't presented, as expected. How can I present the tabBarVC and get the navBars to show up correctly?

Upvotes: 1

Views: 38

Answers (3)

Dan Levy
Dan Levy

Reputation: 4281

I was trying to present the tabBarController with a navController. The code I ended up using that works.

In didFinishLaunchingWithOptions:

if currentUser != nil {

    initialVC("tabBarVC")

} else {

    initialVC("loginVC")

}

The function:

func initialVC(storyboardID: String) {

    let mainStoryboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let initialViewController : UIViewController = mainStoryboard.instantiateViewControllerWithIdentifier("\(storyboardID)") as UIViewController
    self.window?.makeKeyAndVisible()

    if storyboardID == "tabBarVC" {

        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        self.window?.rootViewController = initialViewController

    } else {

        let navController = UINavigationController(rootViewController: initialViewController)
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        self.window?.rootViewController = navController

    } 
}

Upvotes: 0

pedrouan
pedrouan

Reputation: 12910

Check few points:

1) Maybe your settings about navbar are neutral (Top Bar dropdown on the right)

enter image description here

2) If step no 1 does not work, try to insert navigationItem manually into your viewController:

enter image description here

Upvotes: 1

Igor Kislyuk
Igor Kislyuk

Reputation: 330

First, if you are using UITabBarController, you should initialise its property viewControllers directly.
Second, you should not downcast all controller to its base type.
Third, possibly you may use such scheme: Navigation(always root) - Initial Controller, and if there is no login you push Login View controller

Upvotes: 1

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