Black screen after presenting modal view controller in current context from UITabBarController

Question

My root view controller is a UITabBarController. I\'m trying to present a modal view controller over one of the tab bar controller\'s view controllers, but still allow the

Answer 1

Having a similiar issue with my tab controller, however like the comments, I suggest changing the segue to a push or a show segue. This will allow that tab to remain in tact with the new view shown in place of the old view when switching to other tabs. If aesthetics is an issue you can make a custom navigation controller to customize the appearance of the new view.

Answer 2

Try presenting the view controller in application window. I had a similar problem which was fixed by below code:

    let myNewVC = mainStoryBoard.instantiateViewController(withIdentifier: "MyNewVCId") as! MyNewVC
    let navController = UINavigationController(rootViewController: myNewVC)
    navController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext    

    let appDelegate = UIApplication.shared.delegate as? AppDelegate
    appDelegate?.window?.rootViewController?.present(navController, animated: true, completion: nil)

Hope this helps you too.

Answer 3

I have same problem in currently live swift project. I have did workaround on that.

Then finally i have used NSNotificationCenter and dismiss that view controller when tab is changed to solve this problem.

I have referenced tabbar controller in AppDelegate and set delegate there.

let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)

let tabbarcontroller = storyboard.instantiateViewControllerWithIdentifier("MyTabBarController") as! UITabBarController

tabbarcontroller.delegate = self

And it's delegate as

//MARK: - Tabbar controller delegate

extension AppDelegate : UITabBarControllerDelegate {

    func tabBarController(tabBarController: UITabBarController, didSelectViewController viewController: UIViewController) {

        NSNotificationCenter.defaultCenter().postNotificationName("TabBarTabChanged", object: nil)
    }
}

Then I have add observer in my presented view controller as

override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(PreviewPlaceVC.BackClickAction(_:)), name: "TabBarTabChanged", object: nil)
}

// MARK: - Button Click Actions

@IBAction func BackClickAction(sender: AnyObject) {
     self.dismissViewControllerAnimated(true, completion: nil)
}

And it's work fine for me. Not a proper solution I think to dismiss view controller on tab change event, but it is ok to dismiss rather than black screen which also breaks navigation that time.