I have added a NavigationController in the StoryBoard and made it the initial viewController.
How do I get access to the NavigationController in the appDelegate. Ctrl-drag from navigationController to AppDelegate does not create an outlet.
In didFinishLaunchingWithOptions:
let navigationController = application.windows[0].rootViewController as! UINavigationController
In custom functions use like this:
let navigationController = self.window?.rootViewController as! UINavigationController
Related
I want to change my entry Point of my project but how I can do that? I don't use the storyboard, I do it all programmatically and I want my secondViewController to be the firstViewController.
Thanks in advance!
without storyboard start with your specific ViewController put this code in didfinishlaunchingwithOptions method in AppDelegate.
let homeVC = SecondViewController()
self.window?.rootViewController = homeVC
self.window?.makeKeyAndVisible()
with storyboard
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
let homeVC = storyboard.instantiateInitialViewController()
self.window?.rootViewController = homeVC
self.window?.makeKeyAndVisible()
Is it possible to embed a ViewController in a UINavigationController when it is already presented?
I know that to present a ViewController in a NavigationController you should initialise it before like this:
let navigationController = UINavigationController(rootViewController: viewController)
self.present(navigationController, animated: true)
But I would like to know if it is possible to present a VC:
self.present(viewController, animated: true)
and once it is presented to embed it inside a NavigationController.
I am a rookie in Swift. I have a initial viewController within a navigationController. Inside that is a tableView. When i click on the add button item in the NavigationBar a new viewController is present modaly. Now i click a another button in the presented Vc and the presented Vc is dismiss. The root Vc is present now. But i will show a new root vc. I will set a new root Vc when dismiss the second Vc.
Can i set a new root Vc programmaticly when i dismiss a second vc?
Try this out,
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let newViewController = storyBoard.instantiateViewController(withIdentifier: "YourViewController") as! YourViewController
let navigationController = UINavigationController(rootViewController: newViewController)
let appdelegate = UIApplication.shared.delegate as! AppDelegate
appdelegate.window!.rootViewController = navigationController
I have implemented an EXSlideMenuController and added a TabBarController as a main view controller in the sliding menu controller but now I want to find out the first view controller of TabBarController which is inside the EXSlideMenuController.
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
let menuViewController = storyboard.instantiateViewController(withIdentifier: "menuViewController") as! MenuViewController
let initialViewController = storyboard.instantiateViewController(withIdentifier: "TabBarControllerID") as! TabBarController
let revealController = ExSlideMenuController(mainViewController: initialViewController, leftMenuViewController: menuViewController)
self.window?.rootViewController = revealController
self.window?.makeKeyAndVisible()
how do I find out the first view controller of tab bar controller from the ExSlideMenuController?
Here is the solution to find out the first view controller of a tab bar controller inside an ExSlideMenuController
let rootController = self.window?.rootViewController as! ExSlideMenuController
let customTabBarController = rootController.mainViewController as! CustomTabBarController
let navBarController = customTabBarController.viewControllers?.first as! UINavigationController
let storeController = navBarController.viewControllers.first as! StoreListViewController
may be it will help some other person.
The first part of my app is a Sign in section with built in Navigation controller. When the sign up section is completed and a new user is created I would like to proceed into a UITabBarController and will add seperate navigation controllers for each tab. Right now when sign up is complete and my UITabBarController is presented it still shows the UINavigationController from the first section of my app. How do I exit the UINavigationController once I enter the new UITabBarController?
And here is the code
import UIKit
class SignUpSecondViewController: UIViewController, BEMCheckBoxDelegate {
#IBAction func completeButtonAction(_ sender: Any) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "NewTabBarViewController") as! UIViewController
// Alternative way to present the new view controller
self.navigationController?.show(vc, sender: nil)
}
You should better use
self.navigationController?.present(vc, animated: true, completion: nil)
Generally there is no need for signup once main tabbar controller is up. In this case you can do this which will remove signup from memory.
let appDelegate = UIApplication.shared.delegate as! AppDelegate)
appDelegate.window?.rootViewController = vc