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
Related
From a button action, I have presented a viewController, from that presented VC, add another button and on that button action added a childView like this -
let vc = UIStoryboard(name: "Profile", bundle: nil).instantiateViewController(withIdentifier: "APPopUpViewControllerViewController") as! APPopUpViewControllerViewController
self.addChild(vc)
vc.view.frame = self.view.frame
self.view.addSubview(vc.view)
vc.didMove(toParent: self)
All are working perfectly till now, but when i try to push a viewController from this child VC , it does not work. How can i push a viewController from a childView ??
Push viewController code -
let storyboard = UIStoryboard(name: "WPLogin", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "WPSigninViewController") as! WPSigninViewController
self.navigationController?.pushViewController(vc, animated: true)
My guess is that self.navigationController is nil, so your optional chaining is failing.
You can try
print(parent)
print(parent?.navigationController)
self.parent?.navigationController?.pushViewController(vc, animated: true)
How do you present your ViewController ? If You have pushed it to a navigation controller, then your code is perfect and it should work I think.
If not, then try to present the WPSigninViewController modally as
let storyboard = UIStoryboard(name: "WPLogin", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "WPSigninViewController") as! WPSigninViewController
self.present(vc, animated: true)
and It should work.
If ViewController is your rootController, you can add a NavigationController to it :
let viewController = ViewController(nibName: nil, bundle: nil)
let navigationController = UINavigationController(rootViewController: viewController)
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.rootViewController = navigationController
self.window?.makeKeyAndVisible()
I've created a tabbed application and am able to present a view modally using the code below, however, I'm stuck on dismissing the view and displaying the tab bar and first view controller.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let signUpViewController = storyboard.instantiateViewController(withIdentifier:"SignUpViewController") as! SignUpViewController
self.window?.makeKeyAndVisible()
self.window?.rootViewController = signUpViewController
Inside that signUpViewController do this after giving that tabBarController a storyboard identifier in IB
let tab = storyboard!.instantiateViewController(withIdentifier:"tab")
UIApplication.shared.keyWindow?.rootViewController = tab
OR
(UIApplication.shared.delegate as! AppDelegate).window?.rootViewController = tab
You should present your modal vc over you tab bar vc
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let signUpViewController = storyboard.instantiateViewController(withIdentifier:"SignUpViewController") as! SignUpViewController
signUpViewController.modalPresentationStyle = UIModalPresentationStyle.fullScreen
signUpViewController.modalTransitionStyle = UIModalTransitionStyle.coverVertical
self.window.rootViewController.present(myModalViewController, animated: true, completion: nil)
(if self.window.rootViewController - your tab bar view controller)
And in this case you can use dismiss(animated: true, completion: nil) method in modal vc to dismiss it.
In your TabBarViewController, do the following when presenting SignUpViewController
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier:"SignUpViewController")
viewController.modalPresentationStyle = .overFullScreen
self.presentViewController(viewController, animated:true)
and when dismissing, simply call the dismiss code from SignUpViewController
e.g. dismissViewControllerAnimated
When a push notification is received, I am trying to navigate to a table view controller (ReportTVC). The Hierarchy of the view controllers in my storyboard is as shown below.
TabBarController -> Navigation Controller (Storyboard ID: CasesNavController) -> TableViewController (CasesTVC) -> TableViewController (CaseSummaryTVC) -> TableViewController(ReportTVC)
The ReportTVC is being displayed with the navigation controller as expected, but when I navigate back to the CasesTVC, I should have a TabBar with the tabs, but this is missing.
Can someone please advise how I could resolve this ?
In AppDelegate.swift:
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let navController = mainStoryboard.instantiateViewController as! UINavigationController
let reportTVC = mainStoryboard.instantiateViewController(withIdentifier: "ReportTVC") as! ReportTVC
reportTVC.obtainDoctorReport = true
reportTVC.caseId = caseId
navController.pushViewController(reportTVC, animated: true)
self.window?.rootViewController = navController
self.window?.makeKeyAndVisible()
The problem here is that you're setting the NavigationController to the as rootViewController you need to set the TabBarController as the root.
let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
let navController = mainStoryboard.instantiateViewController(withIdentifier: "Nav") as! UINavigationController
let tabController = mainStoryboard.instantiateViewController(withIdentifier: "Tab") as! UITabBarController
let reportTVC = mainStoryboard.instantiateViewController(withIdentifier: "ReportTVC") as! ReportTVC
reportTVC.obtainDoctorReport = true
reportTVC.caseId = caseId
navController.pushViewController(reportTVC, animated: true)
tabController.setViewControllers([navController], animated: false)
self.window?.rootViewController = tabController
self.window?.makeKeyAndVisible()
You shouldn't forget that you also need the add the other ViewControllers in the TabBarViewController.
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 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()