I have two classes AppDelegate.swift and scene.swift and My first screen is login screen when I click login button then it should set my HomeVC.swift as rootViewController at the action of login button I mentioned this code and its not giving any error not even running
let sceneDelegate = SceneDelegate()
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let vc = mainStoryboard.instantiateViewController(withIdentifier: "HomeVC") as! HomeVC
sceneDelegate.window?.rootViewController = vc
window?.makeKeyAndVisible()
Can somebody guide me how to work with new file sceneDelegate.swift?
Thanks in advance
when I click login button then it should set my HomeVC.swift as rootViewController
let vc = // ...
self.view.window?.rootViewController = vc
Related
I have this app that requires to have OnboardingVC which provides tutorials for the users. The OnboardingVCis launched upon app installation. I added my code inside appdelegate which consist of code below:
`if !UserDefaults.standard.bool(forKey: "didSee") {
UserDefaults.standard.set(true, forKey: "didSee")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainController = storyboard.instantiateViewController(withIdentifier: "OnBoardingVC")
self.window?.rootViewController = mainController
self.window?.makeKeyAndVisible()
}`
When I tapped the Skip and Get Started buttons inside OnboardingVC to proceed to the MainViewController, the Navigation Bar disappears as well as with the other ViewControllers. But when I tapped the Login Button inside MainViewController the Navigation Bar works smoothly. Below are screenshot of my storyboard
Hope I did explain it in a way you can understand my issue. Please help me. Thank you
Use something like this
as your app always start with a navigation controller
if !UserDefaults.standard.bool(forKey: "didSee") {
UserDefaults.standard.set(true, forKey: "didSee")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainController = storyboard.instantiateViewController(withIdentifier: "OnBoardingVC")
let nav1 = UINavigationController()
nav1.viewControllers = [mainController] //Set on board vc as rootviewcontroller
self.window?.rootViewController = nav1
self.window?.makeKeyAndVisible()
}`
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()
In my application, after the user is successfully logged in via his email and password in the first storyboard (Auth.storyboard), he is directed to one of the ViewControllers in the second storyboard (Main.storyboard). The problem is that user is able to swipe back to the login screen in Auth.storyboard.
navigationController?.interactivePopGestureRecognizer?.isEnabled = false
I know that with the above code it is possible to disable this swipe back gesture but according to most people it is not recommended.
Therefore I wonder that is there a better solution to prevent swipe back gesture after a user logged in.
The best way is to present your login controller modally, then dismiss it to don't add this controller in your navigation stack.
If it's your initial controller, embed it in a different controller than the next one or remove it from navigation stack programmatically.
You have to remove the Login ViewController from the stack and you can also make your home view controller as a rootViewController:
var mainNavigationController:UINavigationController?
//After login success
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeInstance = mainStoryboard.instantiateViewControllerWithIdentifier("HomeVC")
mainNavigationController = UINavigationController(rootViewController: homeInstance)
mainNavigationController?.navigationBar.hidden = true
self.window?.rootViewController = mainNavigationController
//Appdelegate code didFinishLaunching
if getUserDefault("isUser") == "YES" {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeInstance = mainStoryboard.instantiateViewControllerWithIdentifier("HomeVC")
mainNavigationController = UINavigationController(rootViewController: homeInstance)
mainNavigationController?.navigationBar.hidden = true
self.window?.rootViewController = mainNavigationController
}
else {
mainNavigationController = window!.rootViewController as? UINavigationController
}
When the login button is clicked you must have pushed the view controller to another screen.
Try to set the view controller instead of push:
func Login(){
let control = storyboard!.instantiateViewController(withIdentifier: identifier)
navigationController?.setViewControllers([control], animated: true)
}
If you were pushing your new controller ,then instead of pushing try adding that to keywindow like this . You will not be redirected to previous window then.
let homeStoryBoard = UIStoryboard(name: "Main", bundle: nil)
let vc = homeStoryBoard.instantiateViewController(withIdentifier: "HomeViewController") as? HomeViewController
let appDelegate = UIApplication.shared.delegate as! AppDelegate
if let window = appDelegate.window {
window.rootViewController = vc
window.makeKeyAndVisible()
}
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()
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)