UITabBarItem font changes after the tab bar gets hidden - ios

I have experienced a strange issue in the app where the selected tab bar colour changes from the colours I have set back to the tint colour after opening a view controller with the following option:
hidesBottomBarWhenPushed = true
Here is the code I have used to set the font colour prior to finding the issue inside of the initialiser of my customer UITabBarController:
let attributes = ...
UITabBarItem.appearance().setTitleTextAttributes(attributes, for: .normal)

I couldn't find a similar issue on StackOverflow and managed to figure out the solution with the help of the team in my company, so I thought I would share it here in case it helps anybody in the future.
The only way to fix the above issue that we've managed to find is adding the following code to the initializer of our customer UITabBarViewController
if #available(iOS 13, *) {
let appearance = UITabBarAppearance()
appearance.backgroundColor = UIColor.white
appearance.shadowImage = UIImage()
appearance.shadowColor = UIColor.white
let defaultAttributes = ...
appearance.stackedLayoutAppearance.normal.iconColor = UIColor.red
appearance.stackedLayoutAppearance.normal.titleTextAttributes = defaultAttributes
appearance.stackedLayoutAppearance.selected.iconColor = UIColor.red
appearance.stackedLayoutAppearance.selected.titleTextAttributes = attributes
tabBar.standardAppearance = appearance
}

Related

How do I Set Unselected Tab Bar Item Color using Swift in Xcode with an iOS 15+ Device?

I'm trying to customize a UITabBar using Swift in Xcode, however I can't figure our how to set the color of the unselected items using the menu on the right side of the window. I've tried the following approaches:
I made a custom class for the TabBarController and implemented it as follows:
class CustomTabBarController : UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
// set unselectedItemTintColor for UITabBar contained in this Controller...
self.tabBar.unselectedItemTintColor = UIColor.white
}
}
When method 1 didn't work, I updated the custom class for the TabBarController with the following implementation...
class CustomTabBarController : UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
// try setting unselected item tint color using new Appearance API...
let appearance = UITabBarAppearance()
appearance.backgroundColor = UIColor.white
appearance.shadowImage = UIImage()
appearance.shadowColor = UIColor.white
appearance.stackedLayoutAppearance.normal.iconColor = UIColor.white
appearance.stackedLayoutAppearance.normal.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
appearance.stackedLayoutAppearance.normal.badgeBackgroundColor = UIColor.white
self.tabBar.standardAppearance = appearance
}
}
Neither of these implemented approaches worked, so I'm trying to figure out what approach/implementation will work. I'm using Xcode version 13.2.1 and Swift version 5.5.2 on an iPhone 11 Pro Max device emulator running iOS 15.2.
Thank you in advance! I really appreciate any suggestions I could get for solving this issue.
I just face the same problem and find a solution for this.
Put this code in your UITabBarController class
if #available(iOS 15, *) {
let tabBarAppearance = UITabBarAppearance()
tabBarAppearance.backgroundColor = .white
tabBarAppearance.stackedLayoutAppearance.selected.titleTextAttributes = [.foregroundColor: UIColor.red]
tabBarAppearance.stackedLayoutAppearance.normal.titleTextAttributes = [.foregroundColor: UIColor.black]
tabBarAppearance.stackedLayoutAppearance.normal.iconColor = UIColor.black
tabBarAppearance.stackedLayoutAppearance.selected.iconColor = UIColor.red
tabBarView.standardAppearance = tabBarAppearance
tabBarView.scrollEdgeAppearance = tabBarAppearance
}

UITabBar titles are truncating after minimising and restoring my app

I have an app with a UITabBar.
I'm using the UITabBarAppearance to configure it.
When I start the app, the tab items are correct:
but when I minimise and then reopen the app they look like this:
Tapping on the tab bar items then restores them back to their original look i.e. the text is correctly drawn.
Any suggestions why this might be happening?
FYI The appearance code I'm using is this:
let appearance = UITabBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.shadowImage = nil
appearance.backgroundColor = UIColor.custom.navBackground
let textAttributes = [NSAttributedString.Key.foregroundColor: UIColor.custom.pink]
appearance.stackedLayoutAppearance.normal.titleTextAttributes = textAttributes
appearance.stackedLayoutAppearance.selected.titleTextAttributes = textAttributes
appearance.inlineLayoutAppearance.normal.titleTextAttributes = textAttributes
appearance.inlineLayoutAppearance.selected.titleTextAttributes = textAttributes
self.tabBar.standardAppearance = appearance
self.tabBar.scrollEdgeAppearance = appearance

Setting of different text colors for different UITabBarItem's in iOS 15

After update to iOS 15, I implemented UITabBar configuration this way:
let backgroundColor = UIColor.grey
let selectedItemTextColor = UIColor.blue
let unselectedItemTextColor = UIColor.black
if #available(iOS 15, *) {
let tabBarAppearance = UITabBarAppearance()
tabBarAppearance.backgroundColor = backgroundColor
tabBarAppearance.stackedLayoutAppearance.selected.titleTextAttributes = [.foregroundColor: selectedItemTextColor]
tabBarAppearance.stackedLayoutAppearance.normal.titleTextAttributes = [.foregroundColor: unselectedItemTextColor]
tabBar.standardAppearance = tabBarAppearance
tabBar.scrollEdgeAppearance = tabBarAppearance
} else {
UITabBarItem.appearance().setTitleTextAttributes([.foregroundColor: selectedItemTextColor], for: .selected)
UITabBarItem.appearance().setTitleTextAttributes([.foregroundColor: unselectedItemTextColor], for: .normal)
tabBar.barTintColor = backgroundColor
}
This works fine for iOS 15 and older versions.
But in my project I need to set selected/unselected text color for one of tab bar items, different from other items. Set it in runtime.
There are 5 tab bar items. In some moment, I need this behavior: four of them should have blue/black text color (for selected/unselected states) and one should have red/green color.
Until iOS 15, I used this code to set colors of needed item in every moment of time:
let indexOfItemToChange = 4
tabBar.items[indexOfItemToChange].setTitleTextAttributes([.foregroundColor: UIColor.red], for: .selected)
tabBar.items[indexOfItemToChange].setTitleTextAttributes([.foregroundColor: UIColor.green], for: .normal)
After update update to iOS 15 it makes no effect. I have tried to set it like this:
let indexOfItemToChange = 4
tabBar.items[indexOfItemToChange].standardAppearance?.stackedLayoutAppearance.normal.titleTextAttributes = [.foregroundColor: UIColor.green]
tabBar.items[indexOfItemToChange].standardAppearance?.stackedLayoutAppearance.selected.titleTextAttributes = [.foregroundColor: UIColor.red]
But it makes no effect too. Even if before setting of tab bar item colors I set UITabBar appearances for each tab bar item:
tabBar.items.forEach {
$0.standardAppearance = standardAppearance
$0.scrollEdgeAppearance = scrollEdgeAppearance
}
Some one faced this issue? Any advice?
PS. In my project there are no xibs and storyboards. So I need to solve my problem only programmatically.

Xcode 11.4. Navigation's Title Color gone BLACK from storyboard

I recently updated my Xcode to 11.4. When I run the app on the device, i've noticed that all my navigations item's titles gone fully black when being set from storyboard.
You can't change neither from code, the following line of code doesn't work anymore
self.navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
I only make it work using some iOS 13 stuffs UINavigationBarAppearance
#available(iOS 13.0, *)
private func setupNavigationBar() {
let app = UINavigationBarAppearance()
app.titleTextAttributes = [.foregroundColor: UIColor.white]
app.backgroundColor = Constants.Color.barColor
self.navigationController?.navigationBar.compactAppearance = app
self.navigationController?.navigationBar.standardAppearance = app
self.navigationController?.navigationBar.scrollEdgeAppearance = app
self.navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
}
Can somebody explain me why??? This is a crucial bug, or some new hidden feature?
This fixed it for me, using UINavigationBarAppearance instead, from: Customizing Your App’s Navigation Bar
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.backgroundColor = UIColor.black
appearance.titleTextAttributes = [.foregroundColor: UIColor.white] // With a red background, make the title more readable.
self.navigationBar.standardAppearance = appearance
self.navigationBar.scrollEdgeAppearance = appearance
self.navigationBar.compactAppearance = appearance // For iPhone small navigation bar in landscape.
} else {
self.navigationBar.barTintColor = UIColor.black
self.navigationBar.tintColor = UIColor.white
self.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
}
Note: I subclassed UINavigationController, and this was called from the override of viewWillAppear.
...or for AppDelegate, app-wide:
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.backgroundColor = UIColor.black
appearance.titleTextAttributes = [
NSAttributedStringKey.foregroundColor: UIColor.white
]
let buttonAppearance = UIBarButtonItemAppearance()
buttonAppearance.normal.titleTextAttributes = [.foregroundColor: UIColor.white]
appearance.buttonAppearance = buttonAppearance
UINavigationBar.appearance().standardAppearance = appearance
UINavigationBar.appearance().scrollEdgeAppearance = appearance
UINavigationBar.appearance().compactAppearance = appearance
UIBarButtonItem.appearance().tintColor = UIColor.white
} else {
UINavigationBar.appearance().barTintColor = UIColor.black
UINavigationBar.appearance().titleTextAttributes = [
NSAttributedStringKey.foregroundColor: UIColor.white
]
UINavigationBar.appearance().tintColor = UIColor.white
UIBarButtonItem.appearance().tintColor = UIColor.white
}
...for AppDelegate, app-wide, in Objective-C:
if (#available(iOS 13, *)) {
UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];
[appearance configureWithOpaqueBackground];
appearance.backgroundColor = UIColor.whiteColor;
appearance.titleTextAttributes = titleAttributes;
UIBarButtonItemAppearance *buttonAppearance = [[UIBarButtonItemAppearance alloc] init];
buttonAppearance.normal.titleTextAttributes = barButtonItemAttributes;
appearance.buttonAppearance = buttonAppearance;
UINavigationBar.appearance.standardAppearance = appearance;
UINavigationBar.appearance.scrollEdgeAppearance = appearance;
UINavigationBar.appearance.compactAppearance = appearance;
[[UINavigationBar appearance] setTintColor:UIColor.blackColor];
} else {
[[UINavigationBar appearance] setBarTintColor:UIColor.whiteColor];
[[UINavigationBar appearance] setTintColor:UIColor.blackColor];
[[UINavigationBar appearance] setTranslucent:false];
[[UINavigationBar appearance] setTitleTextAttributes: titleAttributes];
[[UIBarButtonItem appearance] setTitleTextAttributes:barButtonItemAttributes forState:UIControlStateNormal];
}
On the storyboard, for your Navigation Controller change the "Bar Tint" to its "Default" value, then on your code you can change it as you normally would.
Apple finally fixed it in version 11.4.1
https://developer.apple.com/documentation/xcode_release_notes/xcode_11_4_1_release_notes
Not sure if it's a bug or not.
The way we fixed it is by setting the "Status Bar Style" to either dark or light content in project setting. This will force the Status Bar text color a certain way rather than being determined based on the devices being in Light or Dark mode.
In addition, you need to set the value "View controller-based status bar appearance" to "NO" in your Info.plist. without that value the "Status Bar style" will be overridden.
Next create a custom navigation controller and implement it in your storyboards.
class CustomNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
setNavBar()
}
func setNavBar() {
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.backgroundColor = UIColor.blue
appearance.titleTextAttributes = [.foregroundColor: UIColor.yellow]
self.navigationBar.standardAppearance = appearance
self.navigationBar.scrollEdgeAppearance = appearance
self.navigationBar.compactAppearance = appearance
} else {
self.navigationBar.barTintColor = UIColor.blue
self.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.yellow]
}
}
}
*Colors are set so you can see them clearly working.
I found it was better to set the code in ViewDidLoad rather than ViewDidAppear because my colors were not being set on the initial load, only after navigating back and reloading.
I also found that this issue might be tied to the "Bar Tint" of a NavBar. when we were first trying to resolve it, we set the "Bar Tint" to default and that seemed resolve the error too. However, it made it so we couldn't get the NavBar background color what we wanted. So in my storyboards I made sure to set this value to default just for good measure.
Hope it helps
no need for the workaround.it is a bug in Xcode Interface Builder. Apple release Update for Xcode 11.4.1
from Apple developer release notes
Interface Builder
Fixed an issue that caused some UINavigationBar appearance properties
set in storyboard and XIB documents to be ignored when building with
Xcode 11.4. (60883063) (FB7639654)
https://developer.apple.com/documentation/xcode_release_notes/xcode_11_4_1_release_notes
Similar to Stu Carney's response on 3/25, I added a few more implementation details.
Create a subclass of UINavigationController. Add the following to viewWillAppear:
let isDarkMode = UserDefaults.standard.bool(forKey: "DarkMode")
let titleColor: UIColor = isDarkMode ? .white : .black
let navBarColor: UIColor = isDarkMode ? .black : .white
let tintColor: UIColor = isDarkMode ? .yellow : .red //back button text and arrow color, as well as right bar button item
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.backgroundColor = navBarColor
appearance.titleTextAttributes = [.foregroundColor: titleColor]
appearance.largeTitleTextAttributes = [.foregroundColor: titleColor]
self.navigationBar.standardAppearance = appearance
self.navigationBar.scrollEdgeAppearance = appearance
self.navigationBar.compactAppearance = appearance // For iPhone small navigation bar in landscape.
self.navigationBar.tintColor = tintColor //changes back button text and arrow color, as well as right bar button item
} else {
self.navigationBar.barTintColor = navBarColor
self.navigationBar.tintColor = tintColor
self.navigationBar.titleTextAttributes = [.foregroundColor: titleColor]
self.navigationBar.largeTitleTextAttributes = [.foregroundColor: titleColor]
}
Then override preferredStatusBarStyle:
override var preferredStatusBarStyle: UIStatusBarStyle {
let isDarkMode = UserDefaults.standard.bool(forKey: "DarkMode")
return isDarkMode ? .lightContent : .default
}
If you want to update the navigation bar and status bar dynamically, like from a UISwitch IBAction or selector method, add the following:
navigationController?.loadView()
navigationController?.topViewController?.setNeedsStatusBarAppearanceUpdate()
Also, be sure to set all your navigation bars and bar buttons to the default colors in IB. Xcode seems to have a bug where the the IB colors override the colors set programatically.
In my case, after I upgraded Xcode from 11.3 to 11.4 this bug occurred.
So I have to change my code to blow in order to set an image as background in the navigation bar.
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
let backgroundImage = UIImage(named: "{NAVBAR_IMAGE_NAME}")?.resizableImage(withCapInsets: UIEdgeInsets.zero, resizingMode: .stretch)
appearance.backgroundImage = backgroundImage
self.navigationController?.navigationBar.compactAppearance = appearance
self.navigationController?.navigationBar.standardAppearance = appearance
self.navigationController?.navigationBar.scrollEdgeAppearance = appearance
} else {
self.navigationController?.navigationBar.barTintColor = Utils.themeColor
let backgroundImage = UIImage(named: "{NAVBAR_IMAGE_NAME}")?.resizableImage(withCapInsets: UIEdgeInsets.zero, resizingMode: .stretch)
self.navigationController?.navigationBar.setBackgroundImage(backgroundImage, for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
}
I had the same issue and was wondering that coding is not the solution. There MUST be a way. And found out that checking any option under Navigation bar -> Appearances in storyboard attribute inspector makes the title go black. So uncheck all of them. But not sure how I can have scroll Edge option on to color the status bar as well and still get the title colored.

Dynamically Change iOS Nav Bar Color (Dark Mode)

I'm trying to implement a toggle for dark mode in my app - this would involve toggling the nav bar color to black when the UIViewController is already visible on the screen. I'm aware of how to do this by setting
UINavigationBar.appearance().barTintColor = .black
UINavigationBar.appearance().tintColor = .white
UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
UINavigationBar.appearance().isTranslucent = false
in the AppDelegate, however, this won't work in this case as it needs to be done dynamically.
I've also tried navigationController?.navigationBar.barTintColor = UIColor.white but this doesn't work either.
UPDATE:
I think a lot of the responses were confused with the purpose of this question - this is NOT at all related to the iOS13 Dark Mode which was just released - it is an INDEPENDENT dark mode feature I want to add to my app (similar to other apps like Messenger etc which had dark mode available IN-APP before iOS 13 was released). What I need to do is dynamically update the color of the UINavigationBar AFTER it has been already displayed on the screen, the same way I can change the background color of a view by doing view.backgroundColor = .white and this will update the color in real-time on screen.
Achieved this by making the nav bar translucent (in AppDelegate):
let barAppearance = UINavigationBar.appearance()
barAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor: appRed]
barAppearance.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
barAppearance.shadowImage = UIImage()
barAppearance.isTranslucent = true
Next I create a view and place it behind the nav bar as follows (using SnapKit):
let coverView = UIView()
cover.snp.makeConstraints {
make in
make.left.right.top.equalTo(self)
make.bottom.equalTo(self.snp.top).offset(universalNumber(num: parent!.topbarHeight))
}
where the parent is my UIViewController and topBarHeight is:
extension UIViewController {
/**
* Height of status bar + navigation bar (if navigation bar exist)
*/
var topbarHeight: CGFloat {
return UIApplication.shared.statusBarFrame.size.height +
(self.navigationController?.navigationBar.frame.height ?? 0.0)
}
}
Finally, to update the color I set
coverView.backgroundColor = universalWhite()
where
func universalWhite() -> UIColor {
let defaults = UserDefaults.standard
let darkMode = defaults.bool(forKey: "darkMode")
if darkMode {
return .black
} else {
return .white
}
}
You may want to check out the traits provided with the UIViewController to determine the current Interface style, instead of a manual check for versions running iOS 13+. Using this method, you can define colors in your Assets folder for both appearances.
For below iOS 13, you can use something similar to what #byaruah stated, but that is not a global effect. You should also consider using the UINavigationBar.appearance() functionality for a global approach.

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