I am trying to dismiss a viewController to rootViewController while signOut. But the problem is that the viewController is not getting dismissed, It still remains in the same page itself.
Below I have mentioned the code that I have used.
let AppDel = UIApplication.shared.delegate as! AppDelegate
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let login = mainStoryboard.instantiateViewController(withIdentifier: "login")
let nav = UINavigationController(rootViewController: login)
AppDel.window!.rootViewController = nav
AppDel.window?.rootViewController?.dismiss(animated: true, completion: nil)
(AppDel.window?.rootViewController as? UINavigationController)?.popToRootViewController(animated: true)
login.navigationController?.setNavigationBarHidden(true, animated: false)
Thanks in advance.
Earlier, I have faced the same issue. I was fixed issue by performing all other operation after dismissing controller successfully.
Please refer below sample code. I am sure it will work for you.
AppDel.window?.rootViewController?.dismiss(animated: true, completion: {
(AppDel.window?.rootViewController as? UINavigationController)?.popToRootViewController(animated: true)
login.navigationController?.setNavigationBarHidden(true, animated: false)
})
in the App delegate type a function that takes the new view controller and set it as root. than dismisses the old one.
func updateRootViewController(with viewController: UIViewController) {
guard let oldViewController = self.window?.rootViewController else { return }
UIView.transition(from: oldViewController.view, to: viewController.view, duration: 0.3, options: [.transitionCrossDissolve, .allowAnimatedContent]) { _ in
self.window!.rootViewController = viewController
self.window!.makeKeyAndVisible()
oldViewController.dismiss(animated: false) {
oldViewController.view.removeFromSuperview()
}
}
}
Why have you dismissed your navigation controller before calling popToRootViewController ?
AppDel.window?.rootViewController?.dismiss(animated: true, completion:
nil)
Check if you are calling this from the main thread.
Add your code inside this block:
DispatchQueue.main.async {
// TODO: Your code
}
Related
The issue of Navigation Push And Pop animated Off When Change Root View Controller in appDelegate
If I do this write below code it's working, but my every viewController push, present, and pop animated off.
How to use AppDelegate use window object?
AppDelegate extension
extension AppDelegate {
func PresentLoginNavigationControllerScreen()-> Void {
let mainStoryboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let initialViewController = mainStoryboard.instantiateInitialViewController()
self.window?.rootViewController = initialViewController
self.window?.makeKeyAndVisible()
}
func PresentHomeNavigationControllerScreen()-> Void
{
let mainStoryboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let initialViewController = mainStoryboard.instantiateViewController(withIdentifier: "HomeNavigationController")
self.window?.rootViewController = initialViewController
self.window?.makeKeyAndVisible()
}
}
HomeViewController
#IBAction func LogoutButtonOnClick(_ sender: UIButton)
{
if let appDelegate = UIApplication.shared.delegate! as? AppDelegate
{
appDelegate.PresentLoginNavigationControllerScreen()
}
}
If I change logout button click appdelegate function called and change to HomeViewController To LoginViewController then Navigation pushing animated to going disable. My any screen not animating. But i will application close to again Open Then animted working.
Please tell me How to change root view controller in appDelegate and Relaunch App.
You can switch rootViewController in transition block like this.
UIView.transitionWithView(self.window, duration: 0.5, options: UIViewAnimationOptions.UIViewAnimationOptions.transitionFlipFromLeft, animations: {
self.window.rootViewController = newViewController
}, completion: { (finished: Bool) -> () in
//Completion process
})
Hope this will help you.
I've gone through a tad amount of SO posts about this but none of them clearly state how to get this done in Swift 3.
Simply put, I need to close the current view that is displayed and open a new view controller. Such that the only view controller open would be the 2nd VC
This is the code I tried using, but when I try this the view controller gets closed without the rest of the code getting executed
//Close current VC
self.dismiss(animated: true, completion: nil)
//Open the new VC
let mainStoryboard: UIStoryboard = UIStoryboard(name:"Main",bundle:Bundle.main)
let secondViewController: SecondViewController = mainStoryboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
self.present(secondViewController, animated: true, completion: nil)
Can someone help me out? I just need a simple transition from 1st VC to 2nd VC and close the 1st VC.
The problem is, that "self" can not present the new ViewController since it is the ViewController that is getting dismissed.
You could try calling self.presentingViewController?.present(secondViewController, animated: true, completion: nil)
After spend full day i got a solution on Apple' developer website (on this link)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let secondVC = storyboard.instantiateViewController(identifier: "second_view_controller")
secondVC.modalPresentationStyle = .fullScreen
secondVC.modalTransitionStyle = .crossDissolve
present(secondVC, animated: true, completion: nil)
If you presented that view controller from some view controller or it is the viewcontroller from navigation or tab viewcontroller, then try to get last visible view controller, code is in this link
Get the current displaying UIViewController on the screen in AppDelegate.m
or else use this code (I have copied from that link)
public extension UIWindow {
public var visibleViewController: UIViewController? {
return UIWindow.getVisibleViewControllerFrom(self.rootViewController)
}
public static func getVisibleViewControllerFrom(_ vc: UIViewController?) -> UIViewController? {
if let nc = vc as? UINavigationController {
return UIWindow.getVisibleViewControllerFrom(nc.visibleViewController)
} else if let tc = vc as? UITabBarController {
return UIWindow.getVisibleViewControllerFrom(tc.selectedViewController)
} else {
if let pvc = vc?.presentedViewController {
return UIWindow.getVisibleViewControllerFrom(pvc)
} else {
return vc
}
}
}
}
Then present your viewcontroller from that visibleViewController -
//Close current VC
self.dismiss(animated: true, completion: nil)
//Open the new VC
let mainStoryboard: UIStoryboard = UIStoryboard(name:"Main",bundle:Bundle.main)
let secondViewController: SecondViewController = mainStoryboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
window?.visibleViewController?.present(secondViewController, animated: true, completion: nil)
If your view controller is the root view controller, then set it to root view controller
if let delegate = UIApplication.shared.delegate as? AppDelegate {
delegate.window?.rootViewController = secondViewController
}
I am trying to use this inside my function to present a view controller after a function runs, so included it inside
let window = UIWindow()
let rootViewController = window.rootViewController
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("EmployeeTBCIdentifier")
rootViewController?.presentViewController(setViewController, animated: true, completion: nil)
It's not doing anything, it works if I use it inside viewDidLoad()
here's the main idea, and would it be possible to use completions according to this example,
func logInType(completion(Void1, Void2)->()) {
if login == employer{
void1
}else if login == employee{
void2
}
}
when using the function I want to return this
func logInType{(void1, void2) -> void in
void1 = self.presentview //I want to push view to another if this code executed
void2 = self.presentview //same idea
}
updated : code is working but it's not pushing to the viewcontroller identified.
dispatch_async(dispatch_get_main_queue()){
let window = UIWindow()
let rootViewController = window.rootViewController
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("EmployeeTBCIdentifier")
rootViewController?.presentViewController(setViewController, animated: true, completion: nil)
}
Seems to me that there might be a problem in how you are getting the rootViewController. I think the let window = UIWindow() call is going to return a new UIWindow object instead of what you want which is the window that the root view controller (and your app) is associated with. Continuing this, rootViewController will be nil and your optional chain call rootViewController?.presentViewController(setViewController, animated: true, completion: nil) won't do anything. Use an explicit unwrap via rootViewController!.presentViewController(setViewController, animated: true, completion: nil) and you should see the error
To rectify, get the correct UIWindow another way, either from the UIAppDelegate or from another view controller using OtherViewController.view!.window!
Try using it like so:
dispatch_async(dispatch_get_main_queue())
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("mainView") as! MainViewController
self.presentViewController(vc, animated: true, completion: nil)
}
I am implementing home screen shortcuts using 3D Touch, and it's working well, however the way I currently have it means that when the shortcut takes the user to a specific view controller, the tab bar and navigation bar is missing.
This is my code:
func handleShortCutItem(shortcutItem: UIApplicationShortcutItem) -> Bool {
var handled = false
if let shortcutType = ShortcutType.init(rawValue: shortcutItem.type) {
let rootViewController = window!.rootViewController
switch shortcutType {
case .Favourites:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let rootController = storyboard.instantiateViewControllerWithIdentifier("favourites") as! FavouritesTableViewController
rootController.parkPassed = DataManager.sharedInstance.getParkByName(NSUserDefaults.standardUserDefaults().stringForKey("currentPark")!)
self.window?.rootViewController = rootController
self.window?.makeKeyAndVisible()
handled = true
}
return handled
}
Can anyone suggest what I need to change in the code?
This is the starboard layout (FavouritesTableViewController is indicated):
EDIT:
Here is my updated code:
#available(iOS 9.0, *)
func handleShortCutItem(shortcutItem: UIApplicationShortcutItem) -> Bool {
var handled = false
if let shortcutType = ShortcutType.init(rawValue: shortcutItem.type) {
switch shortcutType {
case .Favourites:
print("favourites")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let rootController = storyboard.instantiateViewControllerWithIdentifier("favourites") as! FavouritesViewController
rootController.parkPassed = DataManager.sharedInstance.getParkByName(NSUserDefaults.standardUserDefaults().stringForKey("currentPark")!)
let root = UIApplication.sharedApplication().delegate as! AppDelegate
if let navCont = root.window?.rootViewController?.navigationController {
navCont.presentViewController(rootController, animated: true, completion: nil)
} else {
root.window?.rootViewController?.presentViewController(rootController, animated: true, completion: nil)
}
root.window?.makeKeyAndVisible()
handled = true
}
}
return handled
}
Try this:
Get the delegate from app delegate:
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
GEt the controller you would like to to present from storyboard:
Controller *cont=//get the reference from storyboard either using storyboard ID
and then make your rootview present the other controller:
[appDelegate.window.rootViewController presentViewController:cont animated:YES completion:^{
DLog(#"presented your view ON TOP of the tab bar controller");
}];
Swift:
var appDelegate: AppDelegate = UIApplication.sharedApplication().delegate()
var cont: Controller = //get the reference form storyboard
appDelegate.window.rootViewController.presentViewController(cont, animated: true, completion: { DLog("presented your view ON TOP of the tab bar controller")
})
you can move the presenting stuff on main thread,if you like!!!!
So I got the solution I hope that will work for you.
First you have to set your Storyboard instance.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
after that you need to set where you want to start the navigation.
let mynVC = storyboard.instantiateViewControllerWithIdentifier("root") as! UINavigationController
right now you can set the viewcontroller that you want to appear
let playVC = storyboard.instantiateViewControllerWithIdentifier("playVC")
So and now you can start the workflow but note that you have to do this in a completion like this
self.window?.rootViewController?.presentViewController(rootVC, animated: true, completion: { () -> Void in
rootVC.pushViewController(playVC, animated: true)
})
So your rootViewController will present you "rootVC" and after that your playVC.
I hope It will help you guys:)
The problem is, you are setting the view controller(named:rootController) to be the window?.rootViewController, other than presenting the rootController by the window?.rootViewController. Just change
self.window?.rootViewController = rootController
to
self.window?.rootViewController.presentViewController(rootController, animated: true, completion: nil)
if you use it like this you will be replaced rootview to this viewcontroller. So this will be a new solo page and its normal to dont have navigationController or tabbarController. Because you have only this new page in view hierarchy.
If you want to present this from rootview, you may try
let root=UIApplication.sharedApplication().delegate as! AppDelegate
if let navCont=root.window?.rootViewController?.navigationController
{
navCont.presentViewController(viewControllerToPresent: UIViewController, animated: true, completion: nil)
}
else{
root.window?.rootViewController?.presentViewController(viewControllerToPresent: UIViewController, animated: true, completion: nil)
}
I'm trying to present a ViewController if there is any saved data in the data model. But I get the following error:
Warning: Attempt to present * on *whose view is not in the window hierarchy"
Relevant code:
override func viewDidLoad() {
super.viewDidLoad()
loginButton.backgroundColor = UIColor.orangeColor()
var request = NSFetchRequest(entityName: "UserData")
request.returnsObjectsAsFaults = false
var appDel:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
var context:NSManagedObjectContext = appDel.managedObjectContext!
var results:NSArray = context.executeFetchRequest(request, error: nil)!
if(results.count <= 0){
print("Inga resultat")
} else {
print("SWITCH VIEW PLOX")
let internVC = self.storyboard?.instantiateViewControllerWithIdentifier("internVC") as internViewController
self.presentViewController(internVC, animated: true, completion: nil)
}
}
I've tried different solutions found using Google without success.
At this point in your code the view controller's view has only been created but not added to any view hierarchy. If you want to present from that view controller as soon as possible you should do it in viewDidAppear to be safest.
In objective c:
This solved my problem when presenting viewcontroller on top of mpmovieplayer
- (UIViewController*) topMostController
{
UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topController.presentedViewController) {
topController = topController.presentedViewController;
}
return topController;
}
Swift 3
I had this keep coming up as a newbie and found that present loads modal views that can be dismissed but switching to root controller is best if you don't need to show a modal.
I was using this
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard?.instantiateViewController(withIdentifier: "MainAppStoryboard") as! TabbarController
present(vc, animated: false, completion: nil)
Using this instead with my tabController:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let view = storyboard.instantiateViewController(withIdentifier: "MainAppStoryboard") as UIViewController
let appDelegate = UIApplication.shared.delegate as! AppDelegate
//show window
appDelegate.window?.rootViewController = view
Just adjust to a view controller if you need to switch between multiple storyboard screens.
Swift 3.
Call this function to get the topmost view controller, then have that view controller present.
func topMostController() -> UIViewController {
var topController: UIViewController = UIApplication.shared.keyWindow!.rootViewController!
while (topController.presentedViewController != nil) {
topController = topController.presentedViewController!
}
return topController
}
Usage:
let topVC = topMostController()
let vcToPresent = self.storyboard!.instantiateViewController(withIdentifier: "YourVCStoryboardID") as! YourViewController
topVC.present(vcToPresent, animated: true, completion: nil)
for SWIFT
func topMostController() -> UIViewController {
var topController: UIViewController = UIApplication.sharedApplication().keyWindow!.rootViewController!
while (topController.presentedViewController != nil) {
topController = topController.presentedViewController!
}
return topController
}
You just need to perform a selector with a delay - (0 seconds works).
override func viewDidLoad() {
super.viewDidLoad()
perform(#selector(presentExampleController), with: nil, afterDelay: 0)
}
#objc private func presentExampleController() {
let exampleStoryboard = UIStoryboard(named: "example", bundle: nil)
let exampleVC = storyboard.instantiateViewController(withIdentifier: "ExampleVC") as! ExampleVC
present(exampleVC, animated: true)
}
Swift 4
func topMostController() -> UIViewController {
var topController: UIViewController = UIApplication.shared.keyWindow!.rootViewController!
while (topController.presentedViewController != nil) {
topController = topController.presentedViewController!
}
return topController
}
Use of main thread to present and dismiss view controller worked for me.
DispatchQueue.main.async { self.present(viewController, animated: true, completion: nil) }
I was getting this error while was presenting controller after the user opens the deeplink.
I know this isn't the best solution, but if you are in short time frame here is a quick fix - just wrap your code in asyncAfter:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.7, execute: { [weak self] in
navigationController.present(signInCoordinator.baseController, animated: animated, completion: completion)
})
It will give time for your presenting controller to call viewDidAppear.
For swift 3.0 and above
public static func getTopViewController() -> UIViewController?{
if var topController = UIApplication.shared.keyWindow?.rootViewController
{
while (topController.presentedViewController != nil)
{
topController = topController.presentedViewController!
}
return topController
}
return nil}
let storyboard = UIStoryboard(name: "test", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "teststoryboard") as UIViewController
UIApplication.shared.keyWindow?.rootViewController?.present(vc, animated: true, completion: nil)
This seemed to work to make sure it's the top most view.
I was getting an error
Warning: Attempt to present myapp.testController: 0x7fdd01703990 on myapp.testController: 0x7fdd01703690 whose view is not in the window hierarchy!
Hope this helps others with swift 3
I have tried so many approches! the only useful thing is:
if var topController = UIApplication.shared.keyWindow?.rootViewController
{
while (topController.presentedViewController != nil)
{
topController = topController.presentedViewController!
}
}
All implementation for topViewController here are not fully supporting cases when you have UINavigationController or UITabBarController, for those two you need a bit different handling:
For UITabBarController and UINavigationController you need a different implementation.
Here is code I'm using to get topMostViewController:
protocol TopUIViewController {
func topUIViewController() -> UIViewController?
}
extension UIWindow : TopUIViewController {
func topUIViewController() -> UIViewController? {
if let rootViewController = self.rootViewController {
return self.recursiveTopUIViewController(from: rootViewController)
}
return nil
}
private func recursiveTopUIViewController(from: UIViewController?) -> UIViewController? {
if let topVC = from?.topUIViewController() { return recursiveTopUIViewController(from: topVC) ?? from }
return from
}
}
extension UIViewController : TopUIViewController {
#objc open func topUIViewController() -> UIViewController? {
return self.presentedViewController
}
}
extension UINavigationController {
override open func topUIViewController() -> UIViewController? {
return self.visibleViewController
}
}
extension UITabBarController {
override open func topUIViewController() -> UIViewController? {
return self.selectedViewController ?? presentedViewController
}
}
The previous answers relate to the situation where the view controller that should present a view 1) has not been added yet to the view hierarchy, or 2) is not the top view controller.
Another possibility is that an alert should be presented while another alert is already presented, and not yet dismissed.
Swift Method, and supply a demo.
func topMostController() -> UIViewController {
var topController: UIViewController = UIApplication.sharedApplication().keyWindow!.rootViewController!
while (topController.presentedViewController != nil) {
topController = topController.presentedViewController!
}
return topController
}
func demo() {
let vc = ViewController()
let nav = UINavigationController.init(rootViewController: vc)
topMostController().present(nav, animated: true, completion: nil)
}
Swift 5.1:
let storyboard = UIStoryboard.init(name: "Main", bundle: Bundle.main)
let mainViewController = storyboard.instantiateViewController(withIdentifier: "ID")
let appDeleg = UIApplication.shared.delegate as! AppDelegate
let root = appDeleg.window?.rootViewController as! UINavigationController
root.pushViewController(mainViewController, animated: true)
Rather than finding top view controller, one can use
viewController.modalPresentationStyle = UIModalPresentationStyle.currentContext
Where viewController is the controller which you want to present
This is useful when there are different kinds of views in hierarchy like TabBar, NavBar, though others seems to be correct but more sort of hackish
The other presentation style can be found on apple doc