im facing the problem of setting the font-color of the title of one ViewController in swift and resetting it when it disappears. Currently I'm able to set the color from black to white with:
override func viewDidLoad() {
let textAttributes = [NSAttributedStringKey.foregroundColor:UIColor.white]
navigationController?.navigationBar.titleTextAttributes = textAttributes
}
override func viewWillDisappear(_ animated: Bool) {
let textAttributes = [NSAttributedStringKey.foregroundColor:UIColor.black]
navigationController?.navigationBar.titleTextAttributes = textAttributes
}
when I try resetting with UIColor.black it doesn't change anything.
when I try to set the whole appearance there is no change at all.
override func viewDidLoad() {
UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white]
}
override func viewWillDisappear(_ animated: Bool) {
UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.black]
}
How can I still achieve this?
Using Xcode 10.0
Swift 4
Instead of adding the code to viewDidLoad(), add it into viewDidAppear(_:), i.e
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let textAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
navigationController?.navigationBar.titleTextAttributes = textAttributes
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
let textAttributes = [NSAttributedString.Key.foregroundColor:UIColor.black]
navigationController?.navigationBar.titleTextAttributes = textAttributes
}
Thanks everybody for your help.
I got it working for me with another function:
override func willMove(toParentViewController parent: UIViewController?) {
var textAttributes: [NSAttributedString.Key : Any]?
if parent == nil{ // navigating back
textAttributes = [NSAttributedStringKey.foregroundColor:UIColor.black]
}else{
textAttributes = [NSAttributedStringKey.foregroundColor:UIColor.white]
}
navigationController?.navigationBar.titleTextAttributes = textAttributes
}
This functions is also called when a view is building up.
This solution worked for me and the colors are already set when the view is displayed.
I'm open for pro/cons responds to this.
you can use this function viewWillAppear in your code on any view
func navigationBarProperties(vc:UIViewController, title:String){
vc.navigationController!.navigationBar.isHidden = false
vc.navigationController!.navigationBar.isTranslucent = false
// text color
vc.navigationController!.navigationBar.tintColor = UIColor.white
// bar color
vc.navigationController!.navigationBar.barTintColor = UIColor.black
let isFont = UIFont.init(name: "Helvetica-bold", size: 15)
vc.navigationItem.title = title
vc.navigationController!.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1) ,NSAttributedStringKey.font: isFont!]
}
override open func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
//---nav bar customization----//
navigationBarProperties(vc: self, title: "Home")
}
Subclass UINavigationController and assign it to your navigationController:
class CustomNavigationController : UINavigationController {
let usualTextAttributes: [NSAttributedString.Key: Any] = [.foregroundColor: UIColor.red]
let customTextAttributes: [NSAttributedString.Key: Any] = [.foregroundColor: UIColor.blue]
private func updateTitleColorIfNeeded() {
if topViewController is MyCustomViewController {
navigationBar.titleTextAttributes = customTextAttributes
} else {
navigationBar.titleTextAttributes = usualTextAttributes
}
}
override func popViewController(animated: Bool) -> UIViewController? {
updateTitleColorIfNeeded()
return super.popViewController(animated: animated)
}
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
updateTitleColorIfNeeded()
super.pushViewController(viewController, animated: animated)
}
}
If MyCustomViewController is root of the navigation controller, then set it's initial title color in viewDidLoad:
class MyCustomViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.yellow]
}
}
I have a strange issue which I don't really understand.
I have two views, one should have a black title and the other should have a white title.
The issue that I am experiencing is that I can set the color ONCE and not change it back.
So when I go to the view that has the white title from the view with the black title and then go back, the title does not change back to black.
code for white title in viewWillAppear:
self.navigationController?.navigationBar.barStyle = .black
self.navigationController?.navigationBar.tintColor = .white
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
code for black title in viewWillAppear:
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.navigationBar.barStyle = .default
self.navigationController?.navigationBar.tintColor = UIColor.blue
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
Why does it not change back, when I am clearly setting a new color?
EDIT: adding the complete code
Black title view:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.navigationBar.barStyle = .default
self.navigationController?.navigationBar.tintColor = hexStringToUIColor(hex: "4CAF50")
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
self.navigationItem.title = listData.name
clearStatusBarColor()
let editButton = UIBarButtonItem(title: "Edit", style: .plain, target: self, action: #selector(tapToEdit))
let sortImg = UIImage(named: "sort")
sortingButton = UIBarButtonItem(image: sortImg, style: .plain, target: self, action: #selector(tapToSort))
self.navigationItem.rightBarButtonItems = [sortingButton!, editButton]
self.navigationController?.navigationBar.setBackgroundImage(nil, for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = nil
// get updated Data
if User.active.hasListUpdated {
// return with new gameEntries -> Update
listData = User.active.allLists![listDataIndex] // To keep upToDate data!
listEntries = listData.list_entries!
gameEntries = listEntries.compactMap({ (entry: ListEntry) -> GameEntry in
return GameEntry(game: entry.game, platform: nil, platform_id: entry.platform, rating: Int(entry.rating ?? 0), review: nil, notes: entry.description)
})
listTable.reloadData()
}
// Sorting
if hasSortChanged {
hasSortChanged = false
sortList(sort: sortingOption, order: sortingOrder)
}
}
White title view:
override func viewWillAppear(_ animated: Bool) {
if !isPreviewing {
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.navigationBar.barStyle = .black
self.navigationController?.navigationBar.tintColor = .white
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
// MARK: Clear StatusBar
clearStatusBarColor()
if transparentNav {
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for:UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.title = nil
} else {
self.navigationController?.navigationBar.setBackgroundImage(nil, for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = nil
self.title = game.name!
}
}
// MARK: NavigationBar
let button = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(showOptions))
self.navigationItem.rightBarButtonItem = button
// Check if game should have new review or rating
if User.active.hasMainScreenUpdated {
// Update rating
updateUserRating()
// update review
updateUserReviewStatus()
}
// Update lists!
if User.active.hasListUpdated {
updateListsStatus()
}
}
If you are changing the nav bar colors in different view controllers, I recommend you to have a subclass of UIViewController and handle the navbar changes through that. Here's an example for your case.
class CustomUIViewController: UIViewController {
override func didMove(toParentViewController parent: UIViewController?) {
super.didMove(toParentViewController: parent)
if parent == nil {
if SettingsManager.LastBarColor == .default {
self.setLightBars()
}
else {
self.setDarkBars()
}
}
}
func setDarkBars() {
SettingsManager.LastBarColor = .lightContent
UIApplication.shared.statusBarStyle = UIStatusBarStyle.lightContent
tabBarController?.tabBar.tintColor = UIColor.white
navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
}
func setLightBars() {
SettingsManager.LastBarColor = .default
UIApplication.shared.statusBarStyle = UIStatusBarStyle.default
tabBarController?.tabBar.tintColor = UIColor.Black
navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor:UIColor.Black]
navigationController?.navigationBar.barTintColor = UIColor.white
navigationItem.titleView?.tintColor = UIColor.Black
}
}
class SettingsManager {
class var LastBarColor: UIStatusBarStyle = .default
}
And in your view controller use CustomUIViewController, call setDarkBars() or setLightBars() in your viewWillAppear() function.
You can use a custom UINavigationController class then override pushViewController function to set what you need on the navigationBar.
The viewWillAppear method has a lot of code here.
class MyNavigationViewController: UINavigationController {
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
super.pushViewController(viewController, animated: animated)
self.updateForVC(viewController: viewController)
}
func updateForVC(viewController: UIViewController) {
//DO WHATEVER YOU WHANT HERE, title, img, etc
var color = UIColor.black
if viewController.isKind(of: MyClass.self) {
color = UIColor.white
}
self.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: color]
}
}
Try pushViewController to navigate,It is working for me
if let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "SecondViewController") as? SecondViewController {
if let navigator = self.navigationController {
navigator.pushViewController(viewController, animated: true)
viewController.title = ""
}
}
I am trying to make my UINavigationBar in UINavigationController transparent. I created a subclass of UINavigationController and liked it to a scene in my storyboard file. Here's a piece of my subclass:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let size = self.navigationBar.frame.size
self.navigationBar.setBackgroundImage(imageWithColor(UIColor.blackColor(), size: size, alpha: 0.2), forBarMetrics: UIBarMetrics.Default)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func imageWithColor(color: UIColor, size: CGSize, alpha: CGFloat) -> UIImage {
UIGraphicsBeginImageContext(size)
let currentContext = UIGraphicsGetCurrentContext()
let fillRect = CGRectMake(0, 0, size.width, size.height)
CGContextSetFillColorWithColor(currentContext, color.CGColor)
CGContextSetAlpha(currentContext, alpha)
CGContextFillRect(currentContext, fillRect)
let retval: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return retval
}
When I run my application a have a navigation bar transparent, but status bar is just black.
For example if I do such thing on UITabBar - it works.
Hope it help you
Swift 2:
self.navigationController.navigationBar.setBackgroundImage(UIImage(), forBarMetrics: UIBarMetrics.Default)
self.navigationController.navigationBar.shadowImage = UIImage()
self.navigationController.navigationBar.isTranslucent = true
self.navigationController.view.backgroundColor = UIColor.clearColor()
Swift 4.2 to Swift 5.1
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true
self.navigationController?.view.backgroundColor = UIColor.clear
Or If you want to sublcass the navigation controller then refer this answer.
Change the status bar style via :
In your Info.plist you need to define View controller-based status bar appearance to any value.
UIApplication.shared.statusBarStyle = .lightContent
If you want to hide the status bar:
UIApplication.shared.isStatusBarHidden = true
Getting this output by light content and by transparent navigation. I have view background is gray. you can see the transparency.
iPhone XR - Swift 4.2 - Large Titles (Test Screenshot)
If you're using Swift 2.0 uses the code block below:
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), forBarMetrics: UIBarMetrics.Default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.translucent = true
For Swift 3.0 use:
navigationController?.setNavigationBarHidden(false, animated: true)
navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
navigationController?.navigationBar.shadowImage = UIImage()
navigationController?.navigationBar.isTranslucent = true
Swift 3.0.1 with Xcode 8.1
In your UINavigationController
override func viewDidLoad() {
super.viewDidLoad()
self.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
self.navigationBar.shadowImage = UIImage()
self.navigationBar.isTranslucent = true
self.view.backgroundColor = UIColor.clear
}
Xcode 8.x : Swift 3: Extension for the same
Write once use throughout
extension UINavigationBar {
func transparentNavigationBar() {
self.setBackgroundImage(UIImage(), for: .default)
self.shadowImage = UIImage()
self.isTranslucent = true
}
}
Create an extension of UINavigationController and present or hide transparent navigation bar.
extension UINavigationController {
public func presentTransparentNavigationBar() {
navigationBar.setBackgroundImage(UIImage(), for:UIBarMetrics.default)
navigationBar.isTranslucent = true
navigationBar.shadowImage = UIImage()
setNavigationBarHidden(false, animated:true)
}
public func hideTransparentNavigationBar() {
setNavigationBarHidden(true, animated:false)
navigationBar.setBackgroundImage(UINavigationBar.appearance().backgroundImage(for: UIBarMetrics.default), for:UIBarMetrics.default)
navigationBar.isTranslucent = UINavigationBar.appearance().isTranslucent
navigationBar.shadowImage = UINavigationBar.appearance().shadowImage
}
}
I tried all methods above and still got white space instead of content that supposed to be rendered through. If you want to draw regular subview (Google map f.e.), not UIScrollView content through navigation bar, then you need to set subview's frame in viewDidAppear.
So step 1:
existingNavigationBar.setBackgroundImage(transparentImageFromAssets, for: .default)
existingNavigationBar.shadowImage = transparentImageFromAssets
existingNavigationBar.isTranslucent = true
step 2:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.mapView.frame = UIScreen.main.bounds
}
This worked for me.
I have an app that sometimes needs its navigation bar to blend in with the content.
Does anyone know how to get rid of or to change color of this annoying little bar?
On the image below situation i have - i'm talking about this 1px height line below "Root View Controller"
For iOS 13:
Use the .shadowColor property
If this property is nil or contains the clear color, the bar displays no shadow
For instance:
let navigationBar = navigationController?.navigationBar
let navigationBarAppearance = UINavigationBarAppearance()
navigationBarAppearance.shadowColor = .clear
navigationBar?.scrollEdgeAppearance = navigationBarAppearance
For iOS 12 and below:
To do this, you should set a custom shadow image. But for the shadow image to be shown you also need to set a custom background image, quote from Apple's documentation:
For a custom shadow image to be shown, a custom background image must
also be set with the setBackgroundImage(_:for:) method. If the default
background image is used, then the default shadow image will be used
regardless of the value of this property.
So:
let navigationBar = navigationController!.navigationBar
navigationBar.setBackgroundImage(#imageLiteral(resourceName: "BarBackground"),
for: .default)
navigationBar.shadowImage = UIImage()
Above is the only "official" way to hide it. Unfortunately, it removes bar's translucency.
I don't want background image, just color##
You have those options:
Solid color, no translucency:
navigationBar.barTintColor = UIColor.redColor()
navigationBar.isTranslucent = false
navigationBar.setBackgroundImage(UIImage(), for: .default)
navigationBar.shadowImage = UIImage()
Create small background image filled with color and use it.
Use 'hacky' method described below. It will also keep bar translucent.
How to keep bar translucent?##
To keep translucency you need another approach, it looks like a hack but works well. The shadow we're trying to remove is a hairline UIImageView somewhere under UINavigationBar. We can find it and hide/show it when needed.
Instructions below assume you need hairline hidden only in one controller of your UINavigationController hierarchy.
Declare instance variable:
private var shadowImageView: UIImageView?
Add method which finds this shadow (hairline) UIImageView:
private func findShadowImage(under view: UIView) -> UIImageView? {
if view is UIImageView && view.bounds.size.height <= 1 {
return (view as! UIImageView)
}
for subview in view.subviews {
if let imageView = findShadowImage(under: subview) {
return imageView
}
}
return nil
}
Add/edit viewWillAppear/viewWillDisappear methods:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if shadowImageView == nil {
shadowImageView = findShadowImage(under: navigationController!.navigationBar)
}
shadowImageView?.isHidden = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
shadowImageView?.isHidden = false
}
The same method should also work for UISearchBar hairline,
and (almost) anything else you need to hide :)
Many thanks to #Leo Natan for the original idea!
Here is the hack. Since it works on key paths might break in the future. But for now it works as expected.
Swift:
self.navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
Objective C:
[self.navigationController.navigationBar setValue:#(YES) forKeyPath:#"hidesShadow"];
If you just want to use a solid navigation bar color and have set this up in your storyboard, use this code in your AppDelegate class to remove the 1 pixel border via the appearance proxy:
[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init]
forBarPosition:UIBarPositionAny
barMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
Try this:
[[UINavigationBar appearance] setBackgroundImage: [UIImage new]
forBarMetrics: UIBarMetricsDefault];
[UINavigationBar appearance].shadowImage = [UIImage new];
Below image has the explanation (iOS7 NavigationBar):
And check this SO question:
iOS7 - Change UINavigationBar border color
The swift way to do it:
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .any, barMetrics: .default)
UINavigationBar.appearance().shadowImage = UIImage()
Wanted to add the Swift version of Serhii's answer. I created a UIBarExtension.swift with the following:
import Foundation
import UIKit
extension UINavigationBar {
func hideBottomHairline() {
self.hairlineImageView?.isHidden = true
}
func showBottomHairline() {
self.hairlineImageView?.isHidden = false
}
}
extension UIToolbar {
func hideBottomHairline() {
self.hairlineImageView?.isHidden = true
}
func showBottomHairline() {
self.hairlineImageView?.isHidden = false
}
}
extension UIView {
fileprivate var hairlineImageView: UIImageView? {
return hairlineImageView(in: self)
}
fileprivate func hairlineImageView(in view: UIView) -> UIImageView? {
if let imageView = view as? UIImageView, imageView.bounds.height <= 1.0 {
return imageView
}
for subview in view.subviews {
if let imageView = self.hairlineImageView(in: subview) { return imageView }
}
return nil
}
}
Simple solution in swift
let navigationBar = self.navigationController?.navigationBar
navigationBar?.setBackgroundImage(UIImage(), forBarPosition: UIBarPosition.Any, barMetrics: UIBarMetrics.Default)
navigationBar?.shadowImage = UIImage()
As of iOS 13 there is a system API to set or remove the shadow
UIKit uses shadowImage and the shadowColor property to determine the shadow's
appearance. When shadowImage is nil, the bar displays a default shadow tinted
according to the value in the shadowColor property. If shadowColor is nil or
contains the clearColor color, the bar displays no shadow.
let appearance = UINavigationBarAppearance()
appearance.shadowImage = nil
appearance.shadowColor = nil
navigationController.navigationBar.standardAppearance = appearance
https://developer.apple.com/documentation/uikit/uibarappearance/3198009-shadowimage
Can also be hidden from Storyboard (working on Xcode 10.1)
By adding runtime attribute: hidesShadow - Boolean - True
In Swift 3.0
Edit your AppDelegate.swift by adding the following code to your application function:
// Override point for customization after application launch.
// Remove border in navigationBar
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
After studying the answer from Serhil, I created a pod UINavigationBar+Addition that can easily hide the hairline.
#import "UINavigationBar+Addition.h"
- (void)viewDidLoad {
[super viewDidLoad];
UINavigationBar *navigationBar = self.navigationController.navigationBar;
[navigationBar hideBottomHairline];
}
Swift 4
//for hiding navigation bar shadow line
navigationController?.navigationBar.shadowImage = UIImage()
pxpgraphics' solution updated for Swift 2.0
extension UINavigationBar {
func hideBottomHairline()
{
hairlineImageViewInNavigationBar(self)?.hidden = true
}
func showBottomHairline()
{
hairlineImageViewInNavigationBar(self)?.hidden = false
}
private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView?
{
if let imageView = view as? UIImageView where imageView.bounds.height <= 1
{
return imageView
}
for subview: UIView in view.subviews
{
if let imageView = hairlineImageViewInNavigationBar(subview)
{
return imageView
}
}
return nil
}
}
extension UIToolbar
{
func hideHairline()
{
let navigationBarImageView = hairlineImageViewInToolbar(self)?.hidden = true
}
func showHairline()
{
let navigationBarImageView = hairlineImageViewInToolbar(self)?.hidden = false
}
private func hairlineImageViewInToolbar(view: UIView) -> UIImageView?
{
if let imageView = view as? UIImageView where imageView.bounds.height <= 1
{
return imageView
}
for subview: UIView in view.subviews
{
if let imageView = hairlineImageViewInToolbar(subview)
{
return imageView
}
}
return nil
}
}
I use a UINavigationBar extension that enables me to hide/show that shadow using the UIAppearance API or selecting which navigation bar has to hide/show that shadow using Storyboard (or source code). Here is the extension:
import UIKit
private var flatAssociatedObjectKey: UInt8 = 0
/*
An extension that adds a "flat" field to UINavigationBar. This flag, when
enabled, removes the shadow under the navigation bar.
*/
#IBDesignable extension UINavigationBar {
#IBInspectable var flat: Bool {
get {
guard let obj = objc_getAssociatedObject(self, &flatAssociatedObjectKey) as? NSNumber else {
return false
}
return obj.boolValue;
}
set {
if (newValue) {
let void = UIImage()
setBackgroundImage(void, forBarPosition: .Any, barMetrics: .Default)
shadowImage = void
} else {
setBackgroundImage(nil, forBarPosition: .Any, barMetrics: .Default)
shadowImage = nil
}
objc_setAssociatedObject(self, &flatAssociatedObjectKey, NSNumber(bool: newValue),
objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
}
Now, to disable the shadow across all navigation bars you have to use:
UINavigationBar.appearance().flat = true
Or you can enable/disable this behavior using storyboards:
Swift 4 Tested
ONE LINE SOLUTION
In Viewdidload()
Set Navigation controller's userdefault value true for key "hidesShadow"
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
}
For iOS 13+
The trick is to initialize 'UINavigationBarAppearance' with TransparentBackground. Then you could easily remove the horizontal line of the navigation bar.
let appearance = UINavigationBarAppearance()
appearance.configureWithTransparentBackground()
appearance.backgroundColor = .green // Required background color
Finally, add the appearance changes to the navigation item as the apple suggested.
self.navigationItem.standardAppearance = appearance
self.navigationItem.scrollEdgeAppearance = appearance
self.navigationItem.compactAppearance = appearance
Swift put this
UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarPosition: .Any, barMetrics: .Default)
UINavigationBar.appearance().shadowImage = UIImage()
in
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
Another option if you want to preserve translucency and you don't want to subclass every UINavigationController in your app:
#import <objc/runtime.h>
#implementation UINavigationController (NoShadow)
+ (void)load {
Method original = class_getInstanceMethod(self, #selector(viewWillAppear:));
Method swizzled = class_getInstanceMethod(self, #selector(swizzled_viewWillAppear:));
method_exchangeImplementations(original, swizzled);
}
+ (UIImageView *)findHairlineImageViewUnder:(UIView *)view {
if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) {
return (UIImageView *)view;
}
for (UIView *subview in view.subviews) {
UIImageView *imageView = [self findHairlineImageViewUnder:subview];
if (imageView) {
return imageView;
}
}
return nil;
}
- (void)swizzled_viewWillAppear:(BOOL)animated {
UIImageView *shadow = [UINavigationController findHairlineImageViewUnder:self.navigationBar];
shadow.hidden = YES;
[self swizzled_viewWillAppear:animated];
}
#end
Slightly Swift Solution
func setGlobalAppearanceCharacteristics () {
let navigationBarAppearace = UINavigationBar.appearance()
navigationBarAppearace.tintColor = UIColor.white
navigationBarAppearace.barTintColor = UIColor.blue
navigationBarAppearace.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
navigationBarAppearace.shadowImage = UIImage()
}
Two lines solution that works for me. Try to add this in ViewDidLoad method:
navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
self.extendedLayoutIncludesOpaqueBars = true
Here's a very simple solution:
self.navigationController.navigationBar.clipsToBounds = YES;
In iOS8, if you set the UINavigationBar.barStyle to .Black you can set the bar's background as plain color without the border.
In Swift:
UINavigationBar.appearance().translucent = false
UINavigationBar.appearance().barStyle = UIBarStyle.Black
UINavigationBar.appearance().barTintColor = UIColor.redColor()
Solution in Swift 4.2:
private func removeHairlineFromNavbar() {
UINavigationBar.appearance().setBackgroundImage(
UIImage(),
for: .any,
barMetrics: .default)
UINavigationBar.appearance().shadowImage = UIImage()
}
Just put this function at the first Viewcontroller and call it in viewdidload
Simple solution – Swift 5
Create an extension:
extension UIImage {
class func hideNavBarLine(color: UIColor) -> UIImage? {
let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()
context?.setFillColor(color.cgColor)
context?.fill(rect)
let navBarLine = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return navBarLine
}
}
Add this to viewDidLoad():
self.navigationController?.navigationBar.shadowImage = UIImage.hideNavBarLine(color: UIColor.clear)
For iOS 9 users, this worked for me. just add this:
UINavigationBar.appearance().shadowImage = UIImage()
The problem with setting a background image is it removes blurring. You can remove it without setting a background image. See my answer here.
pxpgraphics's answer for Swift 3.0.
import Foundation
import UIKit
extension UINavigationBar {
func hideBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = true
}
func showBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView? {
if view is UIImageView && view.bounds.height <= 1.0 {
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInNavigationBar(view: subview) {
return imageView
}
}
return nil
}
}
extension UIToolbar {
func hideHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = true
}
func showHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInToolbar(view: UIView) -> UIImageView? {
if view is UIImageView && view.bounds.height <= 1.0 {
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInToolbar(view: subview) {
return imageView
}
}
return nil
}
}
You should add a view to a bottom of the UISearchBar
let rect = searchController.searchBar.frame;
let lineView : UIView = UIView.init(frame: CGRect.init(x: 0, y: rect.size.height-1, width: rect.size.width, height: 1))
lineView.backgroundColor = UIColor.init(hexString: "8CC73E")
searchController.searchBar.addSubview(lineView)
I Just created an extension for this... Sorry about formatting (this is my first answer).
Usage:
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.hideShadow = true
}
Extension:
UINavigationController.swift
// Created by Ricardo López Rey on 16/7/15.
import Foundation
struct UINavigationControllerExtension {
static var hideShadowKey : String = "HideShadow"
static let backColor = UIColor(red: 247/255, green: 247/255, blue: 248/255, alpha: 1.0)
}
extension UINavigationController {
var hideShadow : Bool {
get {
if let ret = objc_getAssociatedObject(self, &UINavigationControllerExtension.hideShadowKey) as? Bool {
return ret
} else {
return false
}
}
set {
objc_setAssociatedObject(self,&UINavigationControllerExtension.hideShadowKey,newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN_NONATOMIC))
if newValue {
self.navigationBar.setBackgroundImage(solidImage(UINavigationControllerExtension.backColor), forBarMetrics: UIBarMetrics.Default)
self.navigationBar.shadowImage = solidImage(UIColor.clearColor())
} else {
self.navigationBar.setBackgroundImage(nil, forBarMetrics: UIBarMetrics.Default)
}
}
}
private func solidImage(color: UIColor, size: CGSize = CGSize(width: 1,height: 1)) -> UIImage {
var rect = CGRectMake(0, 0, size.width, size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIRectFill(rect)
var image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
}
Within AppDelegate, this has globally changed the format of the NavBar:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarPosition: UIBarPosition.Any, barMetrics: UIBarMetrics.Default)
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().tintColor = UIColor.whiteColor()
UINavigationBar.appearance().barTintColor = UIColor.redColor()
UINavigationBar.appearance().translucent = false
UINavigationBar.appearance().clipsToBounds = false
UINavigationBar.appearance().backgroundColor = UIColor.redColor()
UINavigationBar.appearance().titleTextAttributes = [NSFontAttributeName : (UIFont(name: "FONT NAME", size: 18))!, NSForegroundColorAttributeName: UIColor.whiteColor()] }
Haven't managed to implement anything different on a specific VC, but this will help 90% of people