I have some code to only show the first view controller in my storyboard on the first launch of the app. After that I want to skip that page and go straight to my second view on each launch. I have embedded the first view (which is connected to the second) in a navigation controller.
My issue is that after the first launch when the app goes to the second view directly it's showing the view without the navigation bar on top and I'm not sure why.
In my appdelegate:
func firstLaunchCheck(){
let launchedBefore = UserDefaults.standard.bool(forKey: "launchedBefore")
if launchedBefore{
let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let initialView : UIViewController = storyboard.instantiateViewController(withIdentifier: "mainScreen") as UIViewController
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = initialView
self.window?.makeKeyAndVisible()
}
else{
UserDefaults.standard.set(true, forKey: "launchedBefore")
}
}
UPDATE:
I wound up just changing which view controller were embedded in the navigation controller (excluded the first one) since it didn't make sense to me to have it there. So now after the first launch it loads the navigation controller
SecondViewController is not added in UINavigationController hierarchy, to see the navigationBar on top you can push SecondViewController on firstVC if the launchedBefore is false in appDelegate
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let secondVC = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
let navigationController = window.rootViewController as! UINavigationController
navigationController?.pushViewController(secondVC, animated: false)
You need to embed the second view controller i.e. "mainScreen" in UINavigationController and then make it the rootViewController of your app window.
let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let navigationController = UINavigationController.init(rootViewController: storyboard.instantiateViewController(withIdentifier: "mainScreen"))
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = initialView
self.window?.makeKeyAndVisible()
Related
I am trying to skip the login screen and go straight to the MainViewController when the user is logged in. However the problem is that I have a Tab Bar Controller and Navigation Controller between the login and the main vc. After extensive search I wrote the below code
func showMainViewController() {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainViewController: MainViewController = storyboard.instantiateViewController(withIdentifier: "MainViewController") as! MainViewController
let navigationController = UINavigationController(rootViewController: mainViewController)
//It removes all view controllers from the navigation controller then sets the new root view controller and it pops.
window?.rootViewController = navigationController
// //Navigation bar is hidden
// navigationController.isNavigationBarHidden = true
}
However it fails to show the tab bar view controller. Any help is appreciated.
try this
func showMainViewController() {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainViewController: MainViewController = storyboard.instantiateViewController(withIdentifier: "TabBar")
window?.rootViewController = mainViewController
window?.makeKeyAndVisible()
}
you should instantiate TabBar no main viewController. since is instantiate inmediatrly is if first index or set the selected index
When a user launches the app from a push notification I present one view controller, then push another. My code to present the first VC is as follows
let mainStoryBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeNav: UIViewController = mainStoryBoard.instantiateViewController(withIdentifier: "HomeNavController") as! UINavigationController
let homePageTableVC = mainStoryBoard.instantiateViewController(withIdentifier: String(describing: HomePageTableViewController.self)) as! HomePageTableViewController
homePageTableVC.tipToPresent = tipDay
homeNav.addChildViewController(homePageTableVC)
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = homeNav
self.window?.makeKeyAndVisible()
The tipToPresent property is used by the homePageTableVC (in the viewDidLoad method) to then present the second VC, using this code:
if let tipDayToPresent = tipToPresent {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let tipVC = storyboard.instantiateViewController(withIdentifier: String(describing: TipViewController.self)) as! TipViewController
tipVC.dayOfTip = tipDayToPresent
tipToPresent = nil
navigationController?.pushViewController(tipVC, animated: true)
}
This works well, but when I press the back button to return to the homePageTableVC, the navigation bar is blank. The title image, menu button, and right bar button that normally show up are not visible.
Any help is appreciated.
Good if solution by #augie works. I would suggest you should not change navigation stack when you handle push notification deep link. It should behave same as it does in normal app launch. By that way you don't need to handle any edge case and no need to set up different window.
Solution: Whenever someone click on push notification dismiss all presented controller and popToRootViewController and then navigate to desired screen.
Can you try changing this
homeNav.addChildViewController(homePageTableVC)
to this
homeNav.setViewControllers([homePageTableVC], animated: false)
I believe the problem is how you are adding your table on the navigation controller. Instead of making it your navigation's root viewcontroller you are adding it as a child vc.
Changing your code like this should work:
let mainStoryBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
// Remove type UIViewController
let homeNav = mainStoryBoard.instantiateViewController(withIdentifier: "HomeNavController") as! UINavigationController
let homePageTableVC = mainStoryBoard.instantiateViewController(withIdentifier: String(describing: HomePageTableViewController.self)) as! HomePageTableViewController
homePageTableVC.tipToPresent = tipDay
// Set controllers instead of adding child
homeNav.setViewControllers([homePageTableVC], animated: false)
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = homeNav
self.window?.makeKeyAndVisible()
Here is the code
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "homeTBC") as! UITabBarController
self.window?.rootViewController = vc
self.window?.makeKeyAndVisible()
cant figure it yet.
I have tried this code in My App for root view controller in app delegate working perfect:
As I think you are using this code in presented view controller or in presented navigation controller: Please send the scenario(Screen Shot) exact what you are doing?
var window: UIWindow?
window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "TabbarVC") as! TabbarVC
self.window?.rootViewController = vc
From Apple's Documentation
When creating windows, always set the window’s initial size and
specify the screen on which it is displayed.
Add the size:
self.window = UIWindow.init(frame: UIScreen.main.bounds)
Your complete code should be like that:
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "homeTBC") as! UITabBarController
self.window = UIWindow.init(frame: UIScreen.main.bounds)
self.window?.rootViewController = vc
self.window?.makeKeyAndVisible()
I want to create a Welcome & Guide page for an iOS app. I am using Swift 3. My problem is that when I try to show the Main.storyboard after finishing the Guide instructions, I get a black view instead of the Main.storyboard:
I use window?.rootViewController = ViewController()in AppDelegate.swift to switch a new ViewController which is linked with the Main.storyboard. But I get nothing except a black view.
If you have used storyboard then you will have to fetch your view controller as
let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "your_identifier_which_you_have_set_in_storyboard")
window?.rootViewController = viewController
If your viewController is embedded in UINavigationController then just make this change:
window?.rootViewController = UINavigationController(rootViewController: viewController)
try this one.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "MainVC")
window?.rootViewController = UINavigationController(rootViewController: viewController)
From appDelegate I want to access a view controller which is embedded with UINavigation controller.
How can I do so, knowing that I can directly access that view controller but in this case the navigation bar will not appear, therefore this is not what I want.
I have tried the code found below but it prompts a warning and a black screen is presented.
var storyboard1 = UIStoryboard(name: "Main", bundle: nil)
var viewController: ExamNav_ViewController = storyboard1.instantiateViewControllerWithIdentifier("ExamNav_ViewController") as! ExamNav_ViewController
var rootViewController = self.window!.rootViewController as! UINavigationController
// rootViewController.pushViewController(viewController, animated: true)
rootViewController.presentViewController(viewController, animated: true, completion: nil)
The warning is: Attempt to present PlayMyWay.ExamNav_ViewController: 0x14fd19b50 on UINavigationController: 0x14fd13a90 whose view is not in the window hierarchy!
window = UIWindow(frame: UIScreen.mainScreen().bounds)
let navController: UINavigationController = UIStoryboard(name: "Main", bundle:nil).instantiateViewControllerWithIdentifier("provaNavController") as UINavigationController
window?.rootViewController = navController
window?.makeKeyAndVisible()
More Click here to learn about that
var storyboard = UIStoryboard(name: "Main", bundle: nil)
var objOrderVC = storyboard.instantiateViewControllerWithIdentifier("ExamNav_ViewController") as! ExamNav_ViewController
let navig = UINavigationController(rootViewController: objOrderVC)
navig.setNavigationBarHidden(false, animated: false)
window?.rootViewController = navig