Present modally when tab on tabbar - ios

Question

I am trying to add a new tabbar item in my tabbar, and when tapping the item, the viewcontroller connected to it, should be displayed fullscreen and as a modal.
I have connected the desired VC to the tabbar as a root (in order for it to be displayed in the tabbar).
I have tried the following code, but the VC is displayed as normal behaviour for a tabbar viewcontroller.
How can I make it show modally fullscreen instead?
class tabBarViewController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.tabBarController?.delegate = self
}
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
let isModalView = viewController is dreamteamViewController
if isModalView {
// you can refactor this part of the code
let cameraController = UINavigationController(rootViewController: dreamteamViewController())
self.present(cameraController, animated: true, completion: nil)
return false
} else {
return true
}
}

Answer 1

Change your viewDidLoad like this to set the delegate callback to correct instance:
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
Define and storyboard identifier for your desired viewcontroller in the story board
Change your shouldSelect method like below:
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool
{
let isModalView = viewController is DesiredViewController
if isModalView {
// you can refactor this part of the code
let mainStory = UIStoryboard(
name: "Main", bundle: nil
)
let desiredVC = mainStory.instantiateViewController(
withIdentifier:"YourIdentifier"
) as UIViewController
let navBar = UINavigationController.init(rootViewController: desiredVC)
self.present(navBar, animated: true, completion: nil)
return false
} else {
return true
}
}
I posted a project in my github that present one of the tabbar item modally. Please check it from https://github.com/Hbehboodi/Navigation-TabbarWithModalTabItem if any thing is not clear.