How do I get rootViewController of Uinavigationcontroller?
How do I get rootViewController of Uinavigationcontroller?
The root view controller is simply the view controller that sits at the bottom of the navigation stack. You can access the navigation controller’s array of view controllers through its viewControllers property. To access the root view controller, we ask for the first item of the array of view controllers.
How do I get to rootViewController in appDelegate?
- YourViewController *rootController =(YourViewController *)[[(YourAppDelegate *) [[UIApplication sharedApplication]delegate] window] rootViewController];
- In Swift2, you have to use “let appDelegate = UIApplication.sharedApplication().delegate as!
What is rootViewController in Swift?
The root view controller provides the content view of the window. Assigning a view controller to this property (either programmatically or using Interface Builder) installs the view controller’s view as the content view of the window.
How do I change the rootViewController in Windows?
To do this…
- Declare a reference to your app. delegate (app called “Test”)…
- Pick a UIViewController you wish to make your “rootViewController”; either from storyboard or define programmatically…
- Putting it all together…
- You can even throw in an animation…
What is navigation Controller in Xcode?
June 03, 2019. A navigation controller is responsible for managing the navigation of hierarchical content. The navigation controller manages the current displayed screens using the navigation stack. At the bottom of this stack is the root view controller and at the top is the view controller currently displayed.
What is UIApplication in Swift?
The centralized point of control and coordination for apps running in iOS.
What is UIWindow?
The presentation of one or more views on a screen is coordinated by UIWindow object. In iOS application usually only has one window. while View multiple. Windows and Views both are used for present your application’s content on the screen.
What is UIWindow in Swift?
The backdrop for your app’s user interface and the object that dispatches events to your views.
How do I get back to Rootviewcontroller in Swift?
To go back to root view controller, you can simply call a line of code and your work will be done. And if you have the splash screen and after that the login screen and you want to go to login screen you can simply append presentedviewcontroller in the above code.
What is the difference between mainviewcontroller and rootviewcontroller?
The rootViewController(i.e. RegisterViewController) dismisses the UINavigationControllerall the way to the just presented MainViewController, which takes us back to the initial state where the UIWindowis showing the RegisterViewController. The RegisterViewControlleris being replaced by the MainViewControlleras the rootViewController.
What happens to the rootviewcontroller when the app is terminated?
Still, the change in the view hierarchy is not permanent. As soon as the app is terminated by iOS due to memory pressure, the next time the user launches the app, the rootViewControllerwill revert to RegisterViewControlleras if it was launched for the first time. This is where state preservation and restoration feature comes in.
What happens to doneviewcontroller when registerviewcontroller is created?
At the end, the DoneViewControlleris removed from the view hierarchy and deallocated. The rootViewController(i.e. RegisterViewController) dismisses the UINavigationControllerall the way to the just presented MainViewController, which takes us back to the initial state where the UIWindowis showing the RegisterViewController.
How do I back up my UIViewController?
There is no “Back” or “Dismiss” button in the MainViewControllerthat can act as the root. For that reason, you should consider it best practise to discard any UIViewControllers and their respective views so as to bring overall memory usage down and establish a new baseline when a user has registered.
