I'm struggling with the problem which is when I'm switching view controllers connected with push segue then everything works as expected. The problem is that I have a search bar that executes Table View Controller from code and when I select the cell from that Table View Controller the next view controller is without tab bar.
I am using Table View Controller as a view that displays results from search bar. When I am selecting cell (result from searching) then I am changing view controller showing the results. But this one is done from storyboard.
I know that the Table View Controller executed from code does not "inherits" tab bar from previous controllers through the navigation bar. But this one should be executed from code.
Initialize Search Result Controller
override func viewDidLoad() {
super.viewDidLoad()
self.definesPresentationContext = true
tableView.separatorStyle = .none
self.extendedLayoutIncludesOpaqueBars = true
refreshControlUI = Refresher.configureRefresher()
tableView.refreshControl = refreshControlUI
refreshControlUI.addTarget(self, action: #selector(pullToRefresh), for: .valueChanged)
// Initialize search table
let priceSearchTable = storyboard?.instantiateViewController(withIdentifier: "CoinSearchTable") as! CoinSearchTableViewController
// asignle pricetable as a search results controller
resultSearchController = UISearchController(searchResultsController: priceSearchTable)
resultSearchController?.searchResultsUpdater = priceSearchTable
// Make navigation bar large
self.navigationController?.navigationBar.prefersLargeTitles = true
self.navigationController?.navigationItem.largeTitleDisplayMode = .never
self.navigationItem.searchController = resultSearchController
// customize search bar
let searchBar = resultSearchController!.searchBar
searchBar.sizeToFit()
searchBar.placeholder = "Search for coins"
resultSearchController?.hidesNavigationBarDuringPresentation = false
resultSearchController?.dimsBackgroundDuringPresentation = true
}
This code is responsible just for passing values to selected view controller.
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if shownAllCoins.count > 0 {
let coinString = shownAllCoins[indexPath.row]
picked = PickedCoin(symbols: [coinString])
picked.delegate = self
navigationController?.setNavigationBarHidden(false, animated: true)
picked.getDetail(name: coinString)
coin = picked.coins[0]
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToDetailsFromSearch" {
if let coin = sender as? [Any]{
if let SearchVC = segue.destination as? DetailPriceViewController{
SearchVC.coin = coin[0] as? Coin
SearchVC.isFromSearching = coin[1] as! Bool
}
}
}
}
Also In Detail View Controller I had to create navigation bar programmatically in case if the segue was from the Search Result Controller.
func addNavBar() {
view.backgroundColor = UIColor(hex: 0x001f3e)
let navBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 20, width: view.frame.size.width, height: 44))
navBar.barTintColor = UIColor(hex: 0x001f3e)
navBar.isTranslucent = false
self.view.addSubview(navBar);
guard let coin = coin else {return}
let navItem = UINavigationItem(title: "\(coin.symbol)")
let backButton = UIButton(type: .custom)
let textAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
navBar.titleTextAttributes = textAttributes
saveButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.bookmarks, target: self, action: #selector(self.selectorName(_ :)));
backButton.setTitle("Back", for: .normal)
backButton.setTitleColor(backButton.tintColor, for: .normal) // You can change the TitleColor
backButton.addTarget(self, action: #selector(self.backAction(_:)), for: .touchUpInside)
navItem.leftBarButtonItem = UIBarButtonItem(customView: backButton)
navItem.rightBarButtonItem = saveButton
navBar.setItems([navItem], animated: false)
}
Bellow is screenshot of storyboard connection. This storyboard without navigation bar is of course this SearchResultController (Table View Controller that displays results and switches to the detail controller).
What is the best way to set tab bar as a root controller or something. I just need the tab bar to be in all view controller doesn't matter if the controllers are initialize from storyboard or code.
I am trying all day to fix this but I don't know how..
I appreciate every help!
Thanks!
Ok, the problem was with segues. I tried to pass the value from another Controller, that has nothing in common with previous one so that was obvious that navigation bar and tab bar wasn't there. While dealing with separate serchable view controller, there should be added delegation, to pass the vale back to Main Controller. When interacting with searchable view controller, the procedure to pass the value to another view controller in my case looks like this:
When I start typing on my Main Controller the new Searchable View Controller Appear
When I find the item I needed Im selecting it by didSelectedRowAt
I'm Passing the selected value through the delegate function
Added delegate to Main Controller from where should be done segue
Now it works like it supposed to.
The simple code looks like this:
protocol SearchTableDelegate {
func passSelectedValue(selected stock: String)
}
In Searchable View Controller declare:
var delegate: SearchTableDelegate!
In DidSelectedRowAt:
delegate.passSelectedValue(selected: selectedValue)
Now in Main Controller:
class MainTableViewController: UITableViewController, SearchTableDelegate {...}
And use the function from protocol:
func passSelectedValue(selected value: String) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
if let destinationVC = storyboard.instantiateViewController(withIdentifier: "details") as? DetailsViewController{
destinationVC.value = value
self.navigationController?.pushViewController(destinationVC, animated: true)
}
}
Also when declaring the SearchableViewController in MainController don't forget to assign delegate from Searchable to self:
searchableTableController.delegate = self
am using navigation bar programmatically in swift, but am not able to show the bar button items in navigation bar,
this is the code what I did
override func viewDidLoad() {
super.viewDidLoad()
let navBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: 420, height: 65))
self.view.addSubview(navBar)
navBar.backgroundColor = hexStringToUIColor("4DC8BD")
let navigationItem = UINavigationItem()
self.title = "Transport APP"
let btn1 = UIButton(type: .custom)
btn1.setImage(UIImage(named: "Menu1"), for: .normal)
btn1.frame = CGRect(x: 30, y: 30, width: 30, height: 30)
btn1.addTarget(self, action: #selector(HomeViewController.menubuttonclick(_:)), for: .touchUpInside)
let item1 = UIBarButtonItem(customView: btn1)
self.navigationItem.setRightBarButtonItems([item1], animated: true)
}
#IBAction func menubuttonclick(_ sender:UIBarButtonItem )
{
print("this menu button click")
}
I can try many ways but am not getting the results
how to show show bar button item in navigation bar,
You should add UINavigationItem to your UINavigationBar and in item1 need to be added in navitem Look at below code
let navitem = UINavigationItem()
navitem.rightBarButtonItem = item1
navBar.setItems([navitem], animated: true)
Swift 3+: Define the barbutton.
//:: Left bar items
lazy var leftBarItem: Array = { () -> [UIBarButtonItem] in
let btnBack = UIButton(type: .custom)
btnBack.frame = kBAR_FRAME
btnBack.addTarget(self, action: #selector(clickOnBackBtn(_:)), for: .touchUpInside)
let item = UIBarButtonItem(customView: btnBack)
item.tag = 3
return [item]
}()
Add this line into viewDidLoad
self.navigationItem.setLeftBarButtonItems(self.leftBarItem, animated: true)
Bar Button Action
#objc func clickOnBackBtn(_ sender: Any){
}
While the other mentioned solutions definitely work for programmatically defining the navigation item, some would prefer a storyboard solution. I searched for a Swift 4, Xcode 9 storyboard solution and was unable to find one, so I will show my solution.
Here is a screenshot of my storyboard before adding the bar button item.
The issue I was having is that while the Shops tableview is embedded in the navigation controller, and adding a bar button item was no issue; the Employees tableview is pushed via the navigation controller in the didSelectRowAt function.
extension ShopsViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedShop = fetchedResultsController.object(at: indexPath)
let st = UIStoryboardname: "Main", bundle: Bundle.main)
let vc = st.instantiateViewController(withIdentifier: "EmployeeViewController") as! EmployeeViewController
vc.shop = selectedShop
self.navigationController?.pushViewController(vc, animated: true)
}
}
The result is that I could not drag a bar button item from the storyboard. When I tried, the item would end up in the tab bar at the bottom:
I found an article that suggested embedding the second view controller in a navigation controller, but that adds other levels of complexity that I wanted to avoid. The work around I found is to drag a navigation item to the navigation bar area, and then you can add a bar button item with no problems.
Here is the result:
I know there is a lot of debate whether storyboards or programmatic layout is better. While I am still very much a beginning iOS developer and cannot personally speak to that, I am finding that sometimes the storyboard solution fits the problem best. I hope this helps other beginners.
if you've already created UINavigationController() you can set navigation items using self.navigationItem like this (in viewDidLoad function):
self.navigationItem.title = "Transport APP"
self.navigationItem.rightBarButtonItem = item1
but if you need to know how to create UINavigationController() for a view, you can do this in AppDelegate class:
let myView = ... //initial your view controller
let nav = UINavigationController()
nav.viewControlles = [myView]
and then everywhere you need, you should push nav view.
let rightBarButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(dismissVC))
self.navigationItem.rightBarButtonItem = rightBarButton
I've watched a lot of questions like this and didn't find an answer for my question.
That how i do now:
APPDELEGATE (didFinishLaunchingWithOptions)
// Text
let barButtonItem = UIBarButtonItem.appearance()
barButtonItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: UIControlState.normal)
barButtonItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: UIControlState.highlighted)
// Image
let backImage = UIImage(named: "arrow_left"
UINavigationBar.appearance().backIndicatorImage = backImage
UINavigationBar.appearance().backIndicatorTransitionMaskImage = backImage
And this almost fit to what i need, but the screen title shifted to the right as there is an invisible back button text. And it definetly is (the root controller's title has 9 characters length):
The question is: How to change image, hide text and keep standart back action for every appearance of back button in ios 9.0 ?
There are three ways to do what you want.
I recommend: Create your own Navigation Class by extending and UINavigationController and override backbuttonItem (UIBarButtonItem) property to customise it according to your requirement. And use the same Navigation Controller class in your project.
Create a custom backBarButton by extending UIBarButtonItem and manually set the same as a back button of default Navigation Controller class, in all view controller.
Hide default navigation bar from root controller and create your own navigation bar using UIView and UIButton in all view controllers. (I always use this choice, that makes customization of navigation bar very easy for me. And I can set my view according to my requirement)
Here is how you can add Custom button for your navigation bar
let btnleft : UIButton = UIButton(frame: CGRect(x:0, y:0, width:35, height:35))
btnleft.contentMode = .center
btnleft.setImage(Set_Local_Image("arrow_left"), for: .normal)
btnleft.addTarget(self, action: #selector(YOUR_ACTION), for: .touchDown)
let backBarButon: UIBarButtonItem = UIBarButtonItem(customView: btnleft)
self.navigationItem.setLeftBarButtonItems([menuBarButon], animated:false)
instead of "arrow_left" You can use any image you want
For Default back action you can create function(YOUR_ACTION) and use in selector of back button
navController.popViewController(animated: true)
I can suggest you 2 options. Both require BaseViewController class as a superclass of all your view controllers.
If you are ok with native back button image, just want to remove back button text you can use this subclass:
class BaseViewController: UIViewController {
var navigationTitle: String = ""
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if !navigationTitle.isEmpty {
navigationItem.title = navigationTitle
}
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
navigationTitle = navigationItem.title ?? ""
navigationItem.title = ""
}
}
If you want to use your custom icon for back button, you should create UIBarButtonItem with your image, add target, selector, handle action of the button. Sample BaseViewController class below:
class BaseViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let backImage = UIImage(named: "arrow_left")
navigationItem.hidesBackButton = true
guard let navigationController = navigationController else {
return
}
if navigationController.viewControllers.count > 1 {
// we have to set back button only when we have at least 1 controller to go back
navigationItem.leftBarButtonItem = UIBarButtonItem(image: backImage, style: .plain, target: self, action: #selector(backBarButtonAction(sender:)))
}
}
// MARK: Actions
func backBarButtonAction(sender: UIBarButtonItem) {
navigationController?.popViewController(animated: true)
}
}
According to https://stackoverflow.com/a/16831482/5790492 there is a way to do this without appearance.
Swift 3.0
extension UIViewController {
func setupCustomBackButton() {
if let controllersCount = navigationController?.viewControllers.count, controllersCount > 1 {
let backButton = UIButton(frame: CGRect(x: 0, y: 0, width: 12, height: 20))
backButton.setBackgroundImage(UIImage(named: "arrow_left"), for: .normal)
backButton.contentMode = .left
let backButtonItem = UIBarButtonItem(customView: backButton)
backButton.addTarget(self, action: #selector(self.popCurrentViewController), for: .touchUpInside)
navigationItem.leftBarButtonItem = backButtonItem
navigationItem.hidesBackButton = true
}
}
func popCurrentViewController() {
navigationController?.popViewController(animated: true)
}
}
UINavigationBar.appearance().setBackgroundImage(UIImage(), for:
UIBarPosition.any, barMetrics: UIBarMetrics.default)
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().tintColor = UIColor.white
UINavigationBar.appearance().barTintColor = UIColor.main
UINavigationBar.appearance().isTranslucent = false
UINavigationBar.appearance().clipsToBounds = false
UINavigationBar.appearance().backgroundColor = UIColor.main
UINavigationBar.appearance().titleTextAttributes = [NSFontAttributeName :
(UIFont(name: "Helvetica", size: 18))!, NSForegroundColorAttributeName:
UIColor.white]
Try this code and make changes accordingly to set image, color and other properties
You should watch Mark Moeykens' youtube series on this. He is IMHO one of the best YouTube presenters for UI Design and implementation in Swift.
The play list is https://www.youtube.com/playlist?list=PLHDMmeIMXj8WyvlX5uFmppVn2Pm0bXVr7
Create an extension for UINavigationItem
extension UINavigationItem {
func backBarButtonItem() -> UINavigationItem {
return UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)
}
}
When I push a UIViewController, it has some title in back button at new UIViewController, if the title has a lot of text, It does not look good in iPhone 4s So I want to remove it.
If I add some code in prepareForSegue function, it is going to be a trouble.
Any better way to achieve this？
If you want back arrow so following code put into AppDelegate file into didFinishLaunchingWithOptions method.
For Objective-C
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];
For Swift
let BarButtonItemAppearance = UIBarButtonItem.appearance()
BarButtonItemAppearance.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: .normal)
Another option give below.
In Objective C
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"" style:UIBarButtonItemStylePlain target:nil action:nil];
In Swift
self.navigationItem.backBarButtonItem = UIBarButtonItem(title:"", style:.plain, target:nil, action:nil)
UPDATE :
let BarButtonItemAppearance = UIBarButtonItem.appearance()
let attributes: [NSAttributedStringKey: Any] = [
BarButtonItemAppearance.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: .normal)
NSAttributedStringKey.font: UIFont.systemFont(ofSize: 0.1),
NSAttributedStringKey.foregroundColor: UIColor.clear]
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .normal)
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .highlighted)
UPDATE SWIFT 4.1 :
let attributes = [NSAttributedStringKey.font: UIFont(name: "Helvetica-Bold", size: 0.1)!, NSAttributedStringKey.foregroundColor: UIColor.clear]
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .normal)
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .highlighted)
Using Offset
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(-1000, 0), for:UIBarMetrics.default)
Work's like charm on Swift 3
self.navigationController?.navigationBar.topItem?.title = " "
I'm using this line of code in AppDelegate file into didFinishLaunchingWithOptions method to remove the backbutton title.
Swift 2.x
let barAppearace = UIBarButtonItem.appearance()
barAppearace.setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), forBarMetrics:UIBarMetrics.Default)
Swift 3.x
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)
Swift 4.x
UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: .normal)
UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: UIControlState.highlighted)
Just need go to your Parent ViewController from where your other ViewControllers are dependent.
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(true)
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)}
Just copy this code in didFinishLaunchingWithOptions launchOptions
Swift 5
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffset(horizontal: -1000.0, vertical: 0.0), for: .default)
Swift 4
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(-1000.0, 0.0), for: .default)
it is simple. put a space in the title of the back button and ready.
Remember that it has to be in the previous view where you want to remove the text.
On iOS 14 is now present the backButtonDisplayMode property in UINavigationItem class. So, to remove back button title you can use
navigationItem.backButtonDisplayMode = .minimal
in the viewDidLoad func of the viewController where you want remove it.
To remove it in all navigationBar I used the swizzling technique
import UIKit
private let swizzling: (UIViewController.Type, Selector, Selector) -> Void = { forClass, originalSelector, swizzledSelector in
if let originalMethod = class_getInstanceMethod(forClass, originalSelector), let swizzledMethod = class_getInstanceMethod(forClass, swizzledSelector) {
let didAddMethod = class_addMethod(forClass, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))
if didAddMethod {
class_replaceMethod(forClass, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
} else {
method_exchangeImplementations(originalMethod, swizzledMethod)
}
}
}
extension UIViewController {
static func swizzle() {
let originalSelector1 = #selector(viewDidLoad)
let swizzledSelector1 = #selector(swizzled_viewDidLoad)
swizzling(UIViewController.self, originalSelector1, swizzledSelector1)
}
#objc open func swizzled_viewDidLoad() {
if let _ = navigationController {
if #available(iOS 14.0, *) {
navigationItem.backButtonDisplayMode = .minimal
} else {
// Fallback on earlier versions
navigationItem.backButtonTitle = ""
}
}
swizzled_viewDidLoad()
}
}
And in application(_:didFinishLaunchingWithOptions:) call
UIViewController.swizzle()
You could create a subclass for all UIViewControllers you want this behavior for, and in the subclass's viewDidLoad:
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.backBarButtonItem = UIBarButtonItem(
title: "", style: .plain, target: nil, action: nil)
}
This way, you can choose which controllers you want the behavior for, without duplicating code. I prefer my controllers to just say "Back", rather than the title of the previous controller, so I set that title here.
You can use xcode 8 and swift 3.0
self.navigationController?.navigationBar.backItem?.title = " "
let barAppearace = UIBarButtonItem.appearance()
barAppearace.setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)
used this line of code in swift 3.0
Taking inspiration from rordulu's answer here, I ended up creating a custom UINavigationController and UINavigation bar which seems to handle all cases of this tricky problem.
1) Initialise new UINavigationController with your custom UINavigationBar:
class CustomNavigationController: UINavigationController {
convenience init() {
self.init(navigationBarClass: CustomNavigationBar.self, toolbarClass: nil)
}
}
2) Set the backItem.title property of the navigation bar to an empty string, every time the view lays itself out
class CustomNavigationBar: UINavigationBar {
override func layoutSubviews() {
backItem?.title = ""
super.layoutSubviews()
}
}
Now every time you use this navigation controller and bar combination, it will never have back button text! 🎉
Note: this should work fine if using storyboards also, just ensure to drop the custom navigation bar component into the view
Simple Solution :
While you are pushing 2nd controller from 1st controller, put self.navigationItem.title = "" in viewWillDisappear of 1st controller. It hides back button title from 2nd controller.
Above statment hides 1st controllers title, hence when we came back we want title for 1st controller again. For that we have add title for 1st controller in viewWillAppear method of 1st controller.
Refer following methods (of 1st controller)
override func viewWillDisappear(_ animated: Bool) {
self.navigationItem.title = ""
}
override func viewWillAppear(_ animated: Bool) {
self.navigationItem.title = "Title"
}
Works on Swift 5:
self.navigationItem.backBarButtonItem?.title = ""
Please note it will be effective for the next pushed view controller not the current one on the display, that's why it's very confusing!
Also, check the storyboard and select the navigation item of the previous view controller then type something in the Back Button (Inspector).
A method for iOS13.
let backButtonAppearance = UIBarButtonItemAppearance(style: .plain)
backButtonAppearance.normal.titleTextAttributes = [.foregroundColor: UIColor.clear]
let navigationBarAppearance = UINavigationBarAppearance()
navigationBarAppearance.backButtonAppearance = backButtonAppearance
UINavigationBar.appearance().standardAppearance = navigationBarAppearance
I usually add or change the back button in viewDidLoad of the UIViewController.
Something like that should work:
let leftButton = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.Plain, target: self, action: "closeView:")
self.navigationItem.leftBarButtonItem = leftButton
Don't forget to change and implement the function that it's called to close the view.
Even easier, just change the title:
self.navigationItem.leftBarButtonItem.title = "Back"
if #available(iOS 14.0, *) {
navigationItem.backButtonDisplayMode = .minimal
} else {
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}
Swift 3:
self.navigationItem.backBarButtonItem = UIBarButtonItem(title:"", style:.plain, target:nil, action:nil)
Adding a second answer here as my first only partially works. This method is less elegant in the fact that it requires calling a method in each view in the application, however it works without any side-effects.
So firstly, create a UIViewController extension class with a function to remove back button text and add a custom back button:
extension UIViewController {
func setBackButton() {
navigationController?.navigationBar.backIndicatorImage = R.image.backArrow()
navigationController?.navigationBar.backIndicatorTransitionMaskImage = R.image.backArrow()
navigationItem.backBarButtonItem = UIBarButtonItem(title: " ", style: .plain, target: nil, action: nil)
}
Secondly, we can simply call out to this function in the viewDidLoad of each view controller you need it in.
Swift 4.2
UIBarButtonItem.appearance().setTitleTextAttributes([.foregroundColor: UIColor.clear], for: .normal)
Updated Answer For Swift 4.2
Working with UIAppearance is a cleaner way of solving the problem but it would cause all the UIBarButtonItem to have a clear text. An improved version of the solution could be to check if the UIBarButtonItem is contained in a UINavigationBar.
UIBarButtonItem.appearance(whenContainedInInstancesOf: [UINavigationBar.self]).setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.clear], for: .normal)
Just create extension of UIViewController with override function awakeFromNib() and make UIBarButtonItem with an empty title and give to navigation backBarButtonItem.
extension UIViewController {
open override func awakeFromNib() {
let backBarBtnItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
navigationItem.backBarButtonItem = backBarBtnItem
}
}
if you want to remove back button title when you open next screen
do this inside the function initialising and pushing a new screen:
navigationItem.backButtonTitle = ""
Full usage:
let view = SomeView()
let controller = UIHostingController(rootView: view)
navigationItem.backButtonTitle = ""
navigationController?.pushViewController(controller, animated: true)
But to customise back buttons for all navigation bars in your app you need to do this:
func setupNavBarAppearance() {
let backButtonImage = Images.west.image.withAlignmentRectInsets(UIEdgeInsets(top: -5, left: -15, bottom: -5, right: -15))
let backButtonAppearance = UIBarButtonItemAppearance(style: .plain)
backButtonAppearance.normal.titleTextAttributes = [.foregroundColor: UIColor.clear]
let appearance = UINavigationBarAppearance()
appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
appearance.backButtonAppearance = backButtonAppearance
appearance.setBackIndicatorImage(backButtonImage, transitionMaskImage: backButtonImage)
UINavigationBar.appearance().standardAppearance = appearance
UINavigationBar.appearance().scrollEdgeAppearance = appearance
UINavigationBar.appearance().tintColor = .white
UINavigationBar.appearance().isTranslucent = false
}
You can call it from your AppDelegate.swift
Swift 4.2 & 5
Instead of playing with the navigation bar tint color which will have side effects if you are using image picker anytime later in your code.
Use below code:
extension UIViewController {
open override func awakeFromNib() {
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}
}
Call it from your first ViewController:
self.awakeFromNib()
Put the below code in any of the UIViewcontroller extension it will hide all the UIViewcontroller back text
open override func awakeFromNib() {
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}
I have a simple solution for those, who don't want to use method swizzling or duplicating a similar code in different view controllers.
To remove back button title, create a UINavigationController subclass and override pushViewController(_, animated:) method:
final class CustomNavigationController: UINavigationController {
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
super.pushViewController(viewController, animated: animated)
let backBarButtonItem = UIBarButtonItem()
backBarButtonItem.title = nil
viewController.navigationItem.backBarButtonItem = backBarButtonItem
}
}
I don't know why but I found problem with hiding back button title in iPhone pluses but in device without plus shows correct with
leftBarButtonItem.title = ""
So I found simple way. It is set tint color to clear in NavigationBar of NavigationViewController in autolayout. It may be problem if you use icons or text tiles with tint. But in my case I don't use it as all.
Just use this:
func removeBackButton(vc:UIViewController) {
let button = UIButton.init(type: .custom)
button.setImage(UIImage.init(named:""), for: .normal)
let leftBarButton = UIBarButtonItem.init(customView: button)
vc.navigationItem.leftBarButtonItem = leftBarButton
}
So call this method in viewDidLoad:
override func viewDidLoad() {
super.viewDidLoad()
removeBackButton(vc:self)
}
You can add this extension to UIViewController
And then call this function in every viewDidLoad()
like : self.updateBackButton()
extension UIViewController {
func updateBackButton(){
if self.navigationController != nil {
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .done, target: self, action: nil)
}
}}
I would like to share a solution that works for me. Also, it can be adjusted base on your needs and requirements.
Note, in my case, I use a storyboard to specify CustomNavigationBar
Swift 4.2
class CustomNavigationBar: UINavigationBar {
override func awakeFromNib() {
super.awakeFromNib()
guard let topItem = topItem else { return }
removeBackButtonTitle(for: topItem)
}
override func pushItem(_ item: UINavigationItem, animated: Bool) {
removeBackButtonTitle(for: item)
super.pushItem(item, animated: animated)
}
func removeBackButtonTitle(for item: UINavigationItem) {
item.backBarButtonItem = UIBarButtonItem()
}
}
Works for Swift 4.2
Using the line of code in AppDelegate file into didFinishLaunchingWithOptions
UIBarButtonItem.appearance(whenContainedInInstancesOf: [UINavigationBar.self]).setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.clear], for: .normal)
UIBarButtonItem.appearance(whenContainedInInstancesOf: [UINavigationBar.self]).setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.clear], for: .highlighted)