I want to be able to change the action of the back bar button item on a specific UIViewController in my navigation controller so that it pops to the root view controller. I've tried the following but they don't work:
let backButton = UIBarButtonItem(title: nil, style: .plain, target: self, action: #selector(back))
self.navigationItem.backBarButtonItem = backButton
and
self.navigationItem.backBarButtonItem?.action = #selector(back)
Any suggestions?
You should use self.navigationItem.leftBarButtonItem = backButton
Good luck
First of all backBarButtonItem action not works because you can only change back button title,take a look question about it here.
Solution
In ViewController from which you want to pop to root ViewController you need to set as a delegate of UINavigationControllerDelegate
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.delegate = self
}
and implement UINavigationControllerDelegate this method`
func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
if viewController.isKind(of:PreviousViewController.self) {
navigationController.popToRootViewController(animated: animated)
}
}
If my answer not fit your needs you can check similar question here.
To keep the same look and feel of the back button but change the action, see the ViewWillDisappear answer to the question regarding, "Execute action when back bar button of UINavigationController is pressed" Execute action when back bar button of UINavigationController is pressed
This is your solution, just need to set target and selector, nothing more.
private func setNavBar() {
let item = navigationItem.backBarButtonItem
item?.target = self
item?.action = #selector(self.donePressed)
navigationItem.leftBarButtonItem = item
}
#objc private func donePressed() {
self.dismiss(animated: true, completion: nil)
}
Related
I was having this issue and I've tried a lot of solutions that was proposed by some kind people here in the following topic:
Swift - How to hide back button in navigation item
I created a ViewController class:
import SwiftUI
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.setHidesBackButton(true, animated: true)
self.navigationController?.navigationBar.isHidden = true
//self.navigationItem.backButtonTitle = "hohoho"
self.navigationItem.leftBarButtonItem = nil
self.navigationItem.hidesBackButton = true
//UINavigationBar.appearance().isHidden = true
//navigationItem.backBarButtonItem = UIBarButtonItem(title: "Home/Return or nohing", style: .bordered, target: nil, action: nil)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationItem.setHidesBackButton(true, animated: true)
self.navigationController?.navigationBar.isHidden = true
//self.navigationItem.backButtonTitle = "hohoho"
self.navigationItem.leftBarButtonItem = nil
self.navigationItem.hidesBackButton = true
//UINavigationBar.appearance().isHidden = true
//navigationItem.backBarButtonItem = UIBarButtonItem(title: "Home/Return or nohing", style: .bordered, target: nil, action: nil)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.navigationItem.setHidesBackButton(true, animated: true)
self.navigationController?.navigationBar.isHidden = true
//self.navigationItem.backButtonTitle = "hohoho"
self.navigationItem.leftBarButtonItem = nil
self.navigationItem.hidesBackButton = true
//UINavigationBar.appearance().isHidden = true
//navigationItem.backBarButtonItem = UIBarButtonItem(title: "Home/Return or nohing", style: .bordered, target: nil, action: nil)
}
}
and AS you can see in the above code I tried every single way with no change - back button still appear - then I try to make simple change like change the text of the back button or the shape and also there is no result!!
Am I do something wrong :( Because I feel like the whole class is not active for my view
Do I need to create an object of ViewController or something like that? Because I just wrote the mentioned code about my view code.
MY GOAL: I just want to move from view to another with no back button if there is another way I wouldn't mind to do it.
PPLLLSSSS HELPP ME Guys I'm so tired, I'll work on another things until find a solution for that and I'm sure there is a lot of people who want a solution for that issue.
Once I find the solution I'll share it with you guys :) Best Wishes and Regards
You just have to add the below code in the ViewController where you want to hide the backbutton.
navigationItem.setHidesBackButton(true, animated: true)
Segue from viewController to viewController2 and name the segue testSegue. This should work.
I had the exact same problem and the only solution that worked was adding
.navigationBarBackButtonHidden(true) in my SwiftUI view
I've a NavigationViewController which segues to a TabbedBarController. I don't want to show the back button on the TabbedBarController.
I've tried both these code snippets in Swift , neither works,
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.tabBarController?.navigationItem.hidesBackButton = true
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationItem.hidesBackButton = true
}
Here's a snap shot,
Here's the tabbed bar view controller,
How can I hide the back button on the Tabbed bar view controller. How can I hide the back button on my tabbed bar controller?
There are quite many ways to do what you want, but what I'm 99.9% sure that would work is that you can add a barButton in your leftBarButtonItems to replace the default backButton of your navigationController:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationItem.leftBarButtonItems = [UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)]
}
Also, when overriding any lifecycle methods of a controller, you might not want to miss anything from the parent class, so don't forget to call its super equivalent like super.viewWillAppear(animated)
I hope this helps!
EDIT: Two ways to do what you want in tabBarController and since I can already picture the flow of your project.
Put the code inside the viewWillAppear of your tabBarController. This means that you might need to subclass the UITabBarController. So it should be like this:
class MyTabBarController: UITabBarController {
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationItem.leftBarButtonItems = [UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)]
}
}
You should present modally your tabBarController (this is more ideal).
I'm wondering what's the best way to achieve the following. My application when launches goes to the following tableview:
When you select a category, a segue to another tableview is made and looks like this:
What I want to do, is eventually have the 'Basket' barButtonItem in the first view to update with the total price of the basket amount. I also want the button to be visible from the entire navigation controller cycle.
Is there a way that I can have the Basket button show on every stage of the navigationcontroller process?
So for example I'd like to have the button show on the second table view.
Yes you can achieve it by use of take class of UINavigationController like below
class CustomNavigationController: UINavigationController, UINavigationControllerDelegate{
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
// MARK: Private Functions
private func addRightBarButtonTo(viewController: UIViewController){
barButtonItem = UIBarButtonItem(title: "Basket", style: .plain, target: self, action: #selector(CustomNavigationController.dismiss(_:)))
viewController.navigationItem.rightBarButtonItem = barButtonItem
}
// MARK: UINavigationController Delegate
func navigationController(navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
self.addRightBarButtonTo(viewController)
}
#objc func dismiss(sender: Any){
self.presentingViewController?.dismissViewControllerAnimated(true, completion: nil)
}
}
Use CustomNavigationController as rootView Controller of the Window.
Second Way
Take extension of UIViewController
extension UIViewController {
func addRightButtonItem() {
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Basket", style: .done, target: self, action: #selector(barButtonMethod(_:)))
}
#objc func barButtonMethod(_ sender: UIBarButtonItem) {
// Your code
}
}
and call below method in viewWillAppear of each and every viewController
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.addRightButtonItem()
}
How do I set a custom image to all back buttons of view controllers pushed in a UINavigationController?
My issues are:
must look like leftBarButtonItem, position-wise (because the backBarButtonItem itself is too glued to the left and I can't seem to change it's horizontal alignment).
has to be on all back actions (instead of manually setting on each view controller).
having a method setCustomBackButton and calling it on each view controller is also not an option, I'm looking for something like UINavigationBar.appearance(), i.e., throughout the app.
Something like this:
But with the back action working without me manually setting the selector on each view controller.
UPDATE: In response to Joe's solution, I'm getting that error:
UINavigationBar.appearance().backIndicatorImage = UIImage(named: "backArrow")
See Here: https://www.raywenderlich.com/108766/uiappearance-tutorial
Below answer based on the following OP answers:
Custom Back Button With Image and How to remove all navigationbar back button title
Try below code in didFinishLaunchingWithOptions method in AppDelegate.
To setting up a custom back button:
let backArrowImage = UIImage(named: "back") // set your back button image here
let renderedImage = backArrowImage?.withRenderingMode(.alwaysOriginal)
UINavigationBar.appearance().backIndicatorImage = renderedImage
UINavigationBar.appearance().backIndicatorTransitionMaskImage = renderedImage
To hide a back button title:
let barAppearace = UIBarButtonItem.appearance()
barAppearace.setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)
Output: Updated
Update:
You need to add the following code to your More Information viewController to keep the title position.
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}
You can create your own subclass of UINavigationController and change the button inside the navigationController(_:willShow:animated:) delegate method as follows:
class MyNavigationController: UINavigationController, UINavigationControllerDelegate, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
delegate = self
interactivePopGestureRecognizer?.delegate = self
}
func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
if viewController != self.viewControllers.first { // don't add button to rootViewController
let backButton = UIBarButtonItem(image: UIImage(named: "backArrow"), style: .plain, target: self, action: #selector(popViewController(animated:)) )
viewController.navigationItem.leftBarButtonItem = backButton
}
}
}
Theoretically the above delegate method could live anywhere, but this way its logical and easy to select where you want to have this functionality.
Also don't forget to set the interactivePopGestureRecognizer delegate for not loosing the edge swipe gesture to go back (this somehow breaks when setting a new leftBarButtonItem).
The above method could be further improved by keeping track of which view controllers were already shown and then only replace the leftBarButtonItem on new ones (right now it also replaces it when going back/popping to an already shown view controller).
Try this Swift 4.2
extension YouFirstViewController: UINavigationControllerDelegate {
func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
if !(viewController is YouFirstViewController) {
let backButton = UIBarButtonItem(image: UIImage(named: "icnBack"), style: .plain, target: self, action: #selector(popview))
viewController.navigationItem.leftBarButtonItem = backButton
}
}
#objc func popview() {
navigationController?.popViewController(animated: true)
}
}
onYouFirstViewController
class YouFirstViewController: UIViewcontroller {
override func viewDidLoad() {
self.navigationController?.delegate = self
}
}
I want to have a back button on the second view controller I have. When it loads now, it does show the back button but I want to change the title from Back to something else. I implemented to viewWillAppear method where I invoke showing the navigation bar.
The following didn't work:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated);
self.navigationController?.navigationBar.hidden = false
self.navigationController?.navigationBar.backItem?.title = "Something Else"
}
Please help me change the title. Should it be in the willAppear or viewDidLoad?
Add this right before the push or popViewController statement in your first view:
let backButton = UIBarButtonItem(title: "Something Else",style: UIBarButtonItemStyle.Plain ,target: nil,action: nil)
self.navigationController!.navigationBar.topItem!.backBarButtonItem = backButton
Or you can do it in your second view this way:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated);
let backButton = UIBarButtonItem(title: "Something Else",style: UIBarButtonItemStyle.Plain ,target: nil,action: nil)
self.navigationController!.navigationBar.topItem!.backBarButtonItem = backButton
}
Ksa_coder I have tried the solution for your question and finally I got.You want to add the below coding in second view controller in viewWillAppear method
override func viewWillAppear(animated: Bool)
{
super.viewWillAppear(animated);
var btnBack = UIBarButtonItem(title: "Something Else",style: UIBarButtonItemStyle.Plain ,target: nil,action: nil)
self.navigationController!.navigationBar.topItem!.backBarButtonItem = btnBack
}