I have a simple app, with only 2 empty page, the first one have a button, for call an action, with the code:
let story = UIStoryboard.init(name: "Main", bundle: nil)
let vc = story.instantiateViewController(withIdentifier: "testId")
self.navigationController?.pushViewController(vc, animated: true)
My second page got for Id "testId", it's two new page, I don't change param, or nothing else.
Please make sure your first view controller has a navigation controller embedded with it,as pushing the view controller require a navigation controller'.It will surely work then.
Related
the thing is im new to ios development this is my second application while working on the first one i mainly used a theme and then worked over it but this one im working from scratch.
My main problem is going from one screen to another
When i use this code it works
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewController(withIdentifier: "servicesScreen") as! ServiceViewController
nextViewController.modalPresentationStyle = .fullScreen
self.present(nextViewController, animated:true, completion:nil)
But i need to use this one so i can go back too but this wont do anything
let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let newViewController = storyBoard.instantiateViewController(withIdentifier: "servicesScreen") as! ServiceViewController
self.navigationController?.pushViewController(newViewController, animated: true)
My question is, am i doing anything wrong here or do i need to add something in scenedeligate?
try
select Main.storyboard
select initial view Controller
select editor -> Embed in -> navigation controller.
For this, you need to add navigation controller to initial storyboards.
If you are using navigationController you need to add a navigation controller first on storyboard or programmatically.
Programmatically add navigation controller check this link:-
Creating a navigationController programmatically (Swift)
or
To add navigation controller on storyboard you should follow this link:-
https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/ImplementNavigation.html
If you have added navigation controller to your app then make sure your intialViewController is set to navigation controller or your navigation controller is added to the stack when you run your application.
Also check for "Is the identifier correct? Did you reference the correct storyboard?".
I have created a TabBarController with 4 UIViewControllers. However, when I want to show one of the ViewControllers in the TabBarController with:
func gotoMainAppVC()
{
let mainVC:SearchVC = SearchVC()
self.present(mainVC, animated: true, completion: nil)
}
I only get a plain black screen. What am I doing wrong?
This is not how any of this works.
I am not sure what self is in your context but I expect it is either a tab bar controller or one of the view controllers on the tab bar.
By calling present it means you want to present a view controller on a current one which by default brings a new fullscreen view controller from bottom upwards.
Since you have created a new instance of view controller by calling SearchVC() this is not the view controller that you see in your storyboard. You may create any instances of any of your view controllers but in your case if you designed SearchVC in a storyboard you want to actually use that version of it. To do so you need to set storyboard id inside your storyboard. After you have done that you should initialise it as using:
UIStoryboard(name: <#T##String#>, bundle: nil).instantiateViewController(withIdentifier: <#T##String#>)
as in
let mainVC:SearchVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "TheIDIHaveSet") as! SearchVC
But again this will not give you the view controller that is inside your tab bar but create a new instance. And it will not instert it as one of the tabs but present a new full screen view controller.
I got the problem is I cannot make go back previous ViewController of different storyboard from NavigationController in TabViewController.
I've already tried with
_ = navigationController?.popViewController(animated: true)
unfortunately, it does not work. And I know that it can be going back with segue but it's not good practice. Please let me know how to do it. Thanks. Following is my hierarchy.
I had the same issue. In this case I am on a different Storyboard and want to return to the Main Storyboard and present the first view controller. Since this controller is embedded in a Navigation Controller that is embedded in a Tab Bar controller, you must instantiate the Tab Bar Controller. Be sure to set the indentifier on the Tab Bar Controller as "TabBarController"... or whatever you like.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "TabBarController") as! UITabBarController
self.present(controller, animated: true, completion: nil)
I have an application with 5 tabs(and a UITabBarController). I have more view controllers which can be shown when user clicks buttons etc. Right now I'm trying to push a view controller in the first tab. When I use the following code, the new view controller completely replaces both the tab bar and the previous view controller so the only view controller that is shown is the new one and there's no way to go back. Here's my code:
#objc func openSettingsPage() {
let vc = UIStoryboard(name: "SettingsPage", bundle: nil).instantiateViewController(withIdentifier: "Settings") as! SettingsViewController
self.tabBarController?.show(vc, sender: self)
}
I've also tried:
let vc = UIStoryboard(name: "SettingsPage", bundle: nil).instantiateViewController(withIdentifier: "Settings") as! SettingsViewController
self.navigationController?.pushViewController(vc, animated: true)
Nothing happens when doing that. trying print(self.navigationcontroller) prints "nil" so apparently it doesn't find a navigation controller even though the view controller I'm writing the code in is embedded in a navigation controller
I am breaking up my project into multiple storyboards. I have a login storyboard with a navigation controller. The last step "Complete Registration" takes you to main.storyboard.
This leaves the navigation controller in place, and the back button takes you back to register. I obviously don't want that. I know I can hide the bar by using:
self.navigationController?.navigationBarHidden = true
But how can I leave the navigation controller?
Any help would be greatly appreciated!
The easiest and most correct way to do this would be to make your login screen a modal view. If you don't want to give your user the ability to go back, then you shouldn't use a push segue. You should use a modal view.
In the iOS Human Interface guidelines it says that modal views should be used for "a self-contained task [that] must be completed—or explicitly abandoned—to avoid leaving the user’s data in an ambiguous state."
A modal view will make it so your login and your main screen have to be in separate Navigation Controllers.
In the completion handler of the "Complete Registration" action you'll want to use the following code.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateInitialViewController() as! (TypeOfViewController)
self.presentViewController(viewController, animated: true, completion: nil)
If your main.storyboard is already embedded in a NavigationController (Initial view controller is a UINavigationController) then you'll have to do that a little bit differently.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateInitialViewController()
self.presentViewController(viewController, animated: true, completion: nil)