Search code examples
iosswiftuinavigationcontrollersegueuiapplication

Swift - Shake gesture dismisses the child view controller

I have two view controllers which are defined in storyboard as,

UIViewController -> (Show Detail Segue) -> UITabBarController

My problem is; I am using a library called netfox to debug my HTTP requests. And this librarie's UI is being triggered by Shake Gesture. But when I come to the UITabBarController Shake Gesture on the simulator does not work at first time. At the second time it dismisses the ViewController that is currently on the screen and obviously a child of UITabBarController and goes back to the initial UIViewController. This is exactly like connecting two ViewControllers with modal segue and calling self.dismiss() from the child one.

I tried to change rootViewController of the UIApplication by,

UIApplication.shared.keyWindow.rootViewController = self

in the viewDidLoad() method of the UITabBarController and it worked. However, for this solution, the items(buttons, titles) in the UINavigationBar of any UINavigationController that is the child of UITabBarController are missing.

I have no idea why this is happening. If someone helps me while I am solving this, I would be really appreciated.

Solution

  • Instead of using 

    self.performSegue(withIdentifier:_)

    calling this in the UIViewController have worked:

    let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = mainStoryboard.instantiateViewControllerWithIdentifier("tabBarcontroller") as UITabBarController  
UIApplication.sharedApplication().keyWindow?.rootViewController = viewController;

    Respect to this answer.