I have two storyboard, SB_A,SB_B
So when I click the button at SB_A, it call
let storyboard: UIStoryboard = UIStoryboard(name: "SB_B", bundle: nil)
let nextView = storyboard.instantiateInitialViewController()
self.present(nextView!, animated: true, completion: nil)
So I can see SB_B storyboard.
But I can't see the back button at first scene in SB_B
I want put back button at right scene and when I click that, back to SB_A storyboard.
How I can put back button at first scene in storyboard?
add these lines in SB_B viewdidload
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(self.leftNavigationItemAction(_:)))
}
#objc func leftNavigationItemAction(_ sender: UIBarButtonItem) -> Void {
_ = popOrDismissViewController(true)
}
try this one...
No you can't use popviewonctroller or Dissmisviewcontroller to go back to previous storyboard's view controller you have to explicitly manage this back functionality to get required functionality using push or present.
Related
I'm in a storyboard and I need to go to another storyboard by tapping a button. Well, this I've already done, but I need to go back to previous storyboard. Here is my code:
func goContact() {
let storyboard = UIStoryboard(name: "FAQ", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "ContactViewController")
self.navigationController?.show(vc, sender: nil)
}
By tapping a button on my UITableViewCell (where I have a protocol), this function (goContact) is called and I switch to another storyboard (FAQ). But, how can I go back to main.storyboard?
I've already tried do this too:
func goContact() {
let storyboard = UIStoryboard(name: "FAQ", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "ContactViewController")
self.navigationController?.show(vc, sender: nil)
// self.navigationController?.pushViewController(vc, animated: true)
// self.present(vc, animated: true, completion: nil)
}
Use only storyboard property , it references to Main storyboard of the app or you can write it like let storyboard = UIStoryboard(name: "Main", bundle: nil)
To go back after push do
self.navigationController?.popViewController(animated: true)
You should push your new view controller onto the navigation controller using push, like in your commented-out code. That will cause the new view controller to have a back button, which will pop it for you without needing any extra code.
I'm presenting a navigation controller (detailview) with showDetailViewController(). I want to dismiss it when a button is pressed. How can I dismiss this viewcontroller?
Code I've attempted:
//detailviewcontroller
#objc
func cancel(_ sender: Any) {
print("cancelPressed")
//self.navigationController?.popViewController(animated: true)
//self.navigationController?.dismiss(animated: true, completion: nil)
//self.dismiss(animated: true, completion: nil)
//splitViewController?.dismiss(animated: true, completion: nil)
//splitViewController?.navigationController?.popToRootViewController(animated: true)
//splitViewController?.navigationController?.popViewController(animated: true)
//splitViewController?.navigationController?.dismiss(animated: true, completion: nil)
//navigationController?.popViewController(animated: true)
//navigationController?.dismiss(animated: true, completion: nil)
//self.navigationController?.popToRootViewController(animated: true)
//self.navigationController?.viewControllers.remove(at: 1)
//self.navigationController?.viewControllers.remove(at: 0) - this one removes to blank view
//self.presentingViewController?.dismiss(animated: true, completion: nil)
}
I've tried multiple stackoverflow solutions:
Dismissing a navigation view controller
How to dismiss a view controller in a navigation controller, without dismissing the whole stack
ios swift - dismiss root view controller of navigation controller
Can't dismiss View Controller that's embedded in a Navigation Controller
How to dismiss a navigation controller presented from another navigation controller in iOS 10 and below?
Can't dismiss navigation controller in Swift
Can't dismiss navigation controller in Swift
Dismissing View Controller Doesn't Work While Using Navigation Controller
Dismiss current navigation controller when clicked tab bar
How to dismiss a certain view controller
How I'm presenting the detailviewcontroller:
//masterviewcontroller
// delegation for passing data between controllers
weak var passDelegate: PlaceSelectionDelegate?
func insertNewObject(_ sender: Any) {
if let detailViewController = passDelegate as? DetailViewController {
if let detailNavigationController = detailViewController.navigationController {
detailViewController.delegate = self
splitViewController?.showDetailViewController(detailNavigationController, sender: nil)
}
}
}
Expected results:
dismiss detail viewController on button press.
Actual results:
No dismiss.
Ok, I've been looking for a way of dealing with this showDetailViewController for a while now and although I'm not sure this answers your question, this is how I did it:
I have two controllers, let's call it FirstController and SecondController. They both inherit from UIViewController. When I click a certain navbar button in the FirstController, I use showDetailViewController to show SecondController as a sheet moving upwards, like the "calendars" button in the Calendar app.
In FirstController I implemented 2 functions: one to show the SecondController and one to dismiss it. I call the dismiss action from within the SecondController. It looks like this:
// FirstController
#objc func showSecondView() {
let vc = SecondController()
vc.delegate = self
let nav = UINavigationController(rootViewController:vc)
self.showDetailViewController(nav, sender: self)
}
func closeSecondView() {
self.dismiss(animated: true)
}
As you can see I wrapped my SecondController in a UINavigationController, so it shows the navbar with title and all. This is how the code looks like:
// SecondController
weak var delegate: FirstController!
override func viewDidLoad() {
super.viewDidLoad()
title = "Second"
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(closeMe))
}
#objc func closeMe() {
delegate.closeSecondView()
}
Notice how I made a property for the FirstController and I use it to dismiss the SecondController. When I presented SecondController I assigned self as delegate, which means I can now call the closeSecondView method from within it.
I am not sure whether it works out of the box with split-view. The documentation seems to suggest that whenever you use it, if the screen is big enough, it behaves differently because UISplitViewController overrides it. It also says there that all view controllers have this method.
Take a look: https://developer.apple.com/documentation/uikit/uiviewcontroller/1621432-showdetailviewcontroller
Give it a go, I hope this helps.
This should work if you simply want to dismiss the navigation controller
navigationController?.dismiss(animated: true, completion: nil)
I have a pop over view controller to change a setting. It updates the text in the app from a UIPickerView. It works great, but the text label does not refresh when I dismiss the pop over view controller. The label updates when I press back and return to the view controller.
How can I refresh the current view after dismissing the pop over view controller?
Here is the code which loads the pop over:
let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "trustSelect") as! WelcomeViewController
self.addChildViewController(popOverVC)
popOverVC.view.frame = self.view.frame
self.view.addSubview(popOverVC.view)
popOverVC.didMove(toParentViewController: self)
The pop over view controller uses the following code to dismiss the view controller when a button is tapped:
self.view.removeFromSuperview()
Its easy to use local notification,
1) put this in your pop over view
override func viewDidDisappear(animated: Bool) {
NSNotificationCenter.defaultCenter().postNotificationName("refresh", object:nil, userInfo: nil)
}
2) Then in your ViewController paste this in viewDidLoad
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ViewController.ChangeText), name: "refresh", object: nil)
3) Then paste this method somewhere in ViewController,
func ChangeText(){
DispatchQueue.main.async {
self.parent?.textLabel.text = "Random text"
}
}
You probably need to set the text in the main thread.
DispatchQueue.main.async {
self.parent?.textLabel.text = "Random text"
}
im currently working on a flow like this: First after i pressed the Login Button on LoginVC -> Push to WebViewVC -> Press Back Button on NavigationBar -> Push to a TabbarVC with also contain the webViewVC, i mean webViewVC is a tab of TabbarVC. So I wonder how can i handle the Back button in order to push to the TabbarVC, not comeback to the LoginVC. Here i would attach my screen flow:
The top left one is the WebViewVC. Thank you very much!
Add this code in the webViewVc (not the one in the tabBar). Call addBackButton in ViewDidLoad
Note: You will need to change the image to one that you have in your assets and change the name of the TabBarVc to the one you have.
func addBackButton(_ viewController: UIViewController)
{
let backButton: UIBarButtonItem = UIBarButtonItem(image: UIImage(named: "Icon_back"), style: .plain, target: self, action: #selector(self.goToTabBar))
self.navigationItem.setLeftBarButton(backButton, animated: true)
}
func goToTabBar()
{
self.navigationController?.popViewController(animated: true)
self.navigationController?.present(TabBarVC(), animated: true, completion: nil)
}
I have a xib file which I have created a pop up controller on a UIView. This pop up controller animates up when a button is pressed on a View Controller 1. I then have a button on the UIView which when pressed I want to present another View Controller (View Controller 2). code looks like:
class PopUpViewControllerSwift : UIViewController {
#IBAction func goToVC2(sender: UIButton) {
self.removeAnimate()
let VC2: VC2 = self.storyboard?.instantiateViewControllerWithIdentifier("VC2") as VC2
var modalStyle: UIModalTransitionStyle = UIModalTransitionStyle.CoverVertical
VC2.modalTransitionStyle = modalStyle
presentViewController(VC2, animated: true, completion: nil)
}
}
Although thou when the button is pressed it crashes, no error or callbacks or anything. Obviously this would normally work if it was just a regular View Controller but because I am doing it inside a pop Up View which has been animated on top of another View I think that is the problem?
Can anybody help?
thanks
I did this in a UICollectionView didSelectItemAtIndexPath method.
// Register Nib
let newViewController = NewViewController(nibName: "NewViewController", bundle: nil)
// Present View "Modally"
self.present(newViewController, animated: true, completion: nil)
I set the ID of the ViewController to the same as the file name so I would be sure to reference the right ViewController.
Make sure self.storyboard is not nil.
Also confirm that VC2 is one of the ViewController's identity in the storyboard file.
I hope it could help you.
if VC2 is in a storyboard file, try to use following command to get VC2
let storyboard = UIStoryboard(name: "YourStoryboardName(maybe 'Main')", bundle: nil)
let vc2 = storyboard.instantiateViewControllerWithIdentifier("VC2") as VC2
or if VC2 is in a nib file, try to use following command to get VC2
let vc2 = VC2(nibName: "YourNibName", bundle: nil)
It should be like this:
let vc = MyViewController(nibName: "MyViewController", bundle: nil)
present(vc, animated: true, completion: nil)