Tab Bar Controller disappearing when moving back to another view - ios

Question

I want to create an app that lets the user click on a button on V1 on the navigation bar. This will segue to V2 where they can press another button on the navigation bar on V2 and it will bring them back to V1 which has the tab bar controller at the bottom. I don't want the tab bar on V2 and I don't want V2 as a tab bar item. When I try this the tab bar disappears on V1 when I segue back to V1 from V2.
TAB BAR CONTROLLER -> TAB BAR ITEM (V1) -> V2(Via navigation bar button item on V1) -> back to V1(Via navigation bar button item on V2)
I have added [self.navigationController, popViewControllerAnimated:YES]; to my button function but it comes up with an error - expected expression in container literal.
Apart from this code I have not got any other code in my app yet.
I am using Xcode 8.0 and Swift 3.0

Answer 1

First create subclass of UITabBarController, Then add properties to AppDelegate
var navController: UINavigationController?
var tabController: MyTabController?
If you want to show tab bar controller on app launch then put these code in AppDelegate in didFinishLaunchingWithOptions
self.window = UIWindow(frame: UIScreen.main.bounds)
let myStoryboard = UIStoryboard(name: "Main", bundle: nil) as UIStoryboard
self.tabController = myStoryboard.instantiateViewController(withIdentifier: "MyTabController") as? MyTabController
//self.navController = UINavigationController(rootViewController: self.tabController!)
//self.window?.rootViewController = self.navController
self.window?.rootViewController = self.tabController
self.window?.makeKeyAndVisible()
return true
If you want to jump on tab bar after login or something else then , add property to that controller
var appDelegate: AppDelegate!
in viewDidLoad
appDelegate = UIApplication.shared.delegate as? AppDelegate
And method should like
func logIntoApp() {
appDelegate.tabController = self.storyboard?.instantiateViewController(withIdentifier: "MyTabController") as? MyTabController
appDelegate.window?.rootViewController = appDelegate.tabController
}
Then in your tab item view controller , create property of AppDelegate and assign delegate as above.
And methods should be like :
#IBAction func showWithTab(_sender: AnyObject) {
let DefaultVC = self.storyboard?.instantiateViewController(withIdentifier: "DefaultViewController") as! DefaultViewController
self.navigationController?.pushViewController(DefaultVC, animated: true)
}
#IBAction func showWithoutTab(_sender: AnyObject) {
let DefaultVC = self.storyboard?.instantiateViewController(withIdentifier: "DefaultViewController") as! DefaultViewController
// You can create your own animation
UIView.transition(from: (appDelegate.tabController?.view)!, to: (appDelegate.navController?.view)!, duration: 0.3, options: UIViewAnimationOptions.curveEaseIn) { (finished) in
self.appDelegate.window?.rootViewController = self.appDelegate.navController
}
// OR you can use like this way
UIView.transition(from: self.view, to: DefaultVC.view, duration: 0.3, options: UIViewAnimationOptions.curveEaseIn) { (finished) in
self.appDelegate.window?.rootViewController = self.appDelegate.navController
}
}

Answer 2

Why not use a simple Tab Bar?
Something like this:
and in VC1 :
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
myTab.removeFromSuperview()
}

Answer 3

I have solved my problem after days of trying to figure out an answer. You need to add this to any view controller.
#IBAction func unwindToViewController (sender: UIStoryboardSegue){
}
Then you can add a segue from bar button item to the exit icon on the view controller.
You can view an image of the VC scene here.