I want to change navigation bar color of QLPreviewController in swift 3. I have used below code to change color but its not working
viewQLPreview = QLPreviewController()
viewQLPreview.dataSource = self
viewQLPreview.delegate = self
viewQLPreview.navigationController?.navigationBar.isTranslucent = false
viewQLPreview.navigationController?.navigationBar.tintColor = UIColor.red
I have used below code to Change navigation bar color of QLPreviewController in swift 3.0
UINavigationBar.appearance().barTintColor = UIColor.red
UINavigationBar.appearance(whenContainedInInstancesOf: [QLPreviewController.self]).backgroundColor = UIColor.red
Use below code before present QLPreviewController :
UINavigationBar.appearance().tintColor = UIColor.red
UINavigationBar.appearance().barTintColor = UIColor.blue
UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.red]
UINavigationBar.appearance().setBackgroundImage(fromColor(color: UIColor.blue), for: .default)
UINavigationBar.appearance().isTranslucent = false
func fromColor (color: UIColor) -> UIImage{
let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContext(rect.size)
let context: CGContext? = UIGraphicsGetCurrentContext()
context?.setFillColor(color.cgColor)
context?.fill(rect)
let image: UIImage? = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image ?? UIImage()
}
Put below code in viewDidLoad of QLPreviewController.
viewQLPreview.navigationController?.navigationBar.isTranslucent = false
viewQLPreview.navigationController?.navigationBar.tintColor = UIColor.red
Also make sure that viewQLPreview.navigationController != nil
If you are pushing QLPreviewController then this code will work....
If you are presenting QLPreviewController then you need to make sure that rootController should be navigation controller, in your case..
let viewQLPreview = QLPreviewController()
let nav = UINavigationController(rootViewController: viewQLPreview)
self.present(nav, animated: true, completion: nil)
Related
I'm trying to make only one view controller's navigation bar translucent and change some of the other attributes.
After the user leaves this VC however I'd like it to go back to 'normal' ie what I have in the AppDelegate.
Do I have to reset each line in the viewWillDisappear? If so what would I use for the background image/shadow image as the default nav bar settings?
// Make Nav Bar Translucent and Set title font/color
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true
self.navigationController?.view.backgroundColor = .clear
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 20, weight: .semibold)]
Yes you have to set the values in ViewWillApear and reset the values in viewWillDisappear function for having clear transparent navigation bar and normal color navigation bar.
You can use extension on UINavigationController which can set/reset values based on some enum value. Create extension on UIImage which can create image from color to apply as a background image on navigation bar and shadow image.
enum NavigationBarMode {
case normal
case clear
}
extension UINavigationController {
func themeNavigationBar(mode: NavigationBarMode) {
self.navigationBar.isTranslucent = true
switch mode {
case .normal:
let image = UIImage.fromColor(.white)
navigationBar.setBackgroundImage(image, for: .default)
navigationBar.shadowImage = UIImage.fromColor(.lightGray)
navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 20, weight: .semibold)]
case .clear:
let image = UIImage()
navigationBar.setBackgroundImage(image, for: .default)
navigationBar.shadowImage = image
navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 20, weight: .semibold)]
}
}
}
extension UIImage {
static func fromColor(_ color: UIColor) -> UIImage {
let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0)
let context = UIGraphicsGetCurrentContext()
context!.setFillColor(color.cgColor)
context!.fill(rect)
let img = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return img!
}
}
now you can call themeNavigationBar(mode: .transparent) in viewWillApear and call themeNavigationBar(mode: .normal) in viewWillDisappear to reset. also you can call themeNavigationbar(mode: .normal) if you have common navigationbar settings from you other viewControllers.
There are some Third party cocoapods available which you can use
https://github.com/MoZhouqi/KMNavigationBarTransition
https://github.com/DanisFabric/RainbowNavigation
How do you set a custom background image for the large title NavigationBar in iOS 11? I'm using a custom subclass which I've assigned to the navigationControllers in the storyboard.
This is how I create my custom NavBar:
class CustomNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.navigationBar.tintColor = UIColor(red:1, green:1, blue:1, alpha:0.6)
self.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
if #available(iOS 11.0, *) {
self.navigationBar.prefersLargeTitles = true
self.navigationItem.largeTitleDisplayMode = .automatic
self.navigationBar.largeTitleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
self.navigationBar.barTintColor = UIColor.green
}
self.navigationBar.isTranslucent = false
self.navigationBar.setBackgroundImage(#imageLiteral(resourceName: "navigationBarBackground"), for: .default)
self.navigationBar.shadowImage = #imageLiteral(resourceName: "navigationBarShadow")
}
}
Strangely the setBackgroundImage(image, for: .default) doesn't work for the large titles. It worked before with iOS 10 and also if I rotate the iPhone (and activate the small NavBar) the background is back?
Edit:
The backgroundImage is still rendered but somehow hidden. Only if you start scrolling and the "normal" Navigation Bar appears, the backgroundImage is visible. Also the barTintColor is completely ignored in this case.
I had the same issue, fixed it by
Remove setBackgroundImage and use barTint color with pattern image
let bgimage = imageWithGradient(startColor: UIColor.red, endColor: UIColor.yellow, size: CGSize(width: UIScreen.main.bounds.size.width, height: 1))
self.navigationBar.barTintColor = UIColor(patternImage: bgimage!)
Get image with gradient colors
func imageWithGradient(startColor:UIColor, endColor:UIColor, size:CGSize, horizontally:Bool = true) -> UIImage? {
let gradientLayer = CAGradientLayer()
gradientLayer.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
gradientLayer.colors = [startColor.cgColor, endColor.cgColor]
if horizontally {
gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.5)
gradientLayer.endPoint = CGPoint(x: 1.0, y: 0.5)
} else {
gradientLayer.startPoint = CGPoint(x: 0.5, y: 0.0)
gradientLayer.endPoint = CGPoint(x: 0.5, y: 1.0)
}
UIGraphicsBeginImageContext(gradientLayer.bounds.size)
gradientLayer.render(in: UIGraphicsGetCurrentContext()!)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
Finally I found solution!
Edit: Works on iOS 13 and higher
You can use it before view appears, eg: in viewDidLoad() method:
override func viewDidLoad()
{
super.viewDidLoad()
let largeTitleAppearance = UINavigationBarAppearance()
largeTitleAppearance.configureWithOpaqueBackground()
largeTitleAppearance.backgroundImage = UIImage(named: "BackgroundImage.png")
self.navigationBar.standardAppearance = largeTitleAppearance
self.navigationBar.scrollEdgeAppearance = largeTitleAppearance
}
All that you need is:
Create UINavigationBarAppearance instance:
let largeTitleAppearance = UINavigationBarAppearance()
Apple documentation:
UINavigationBarAppearance - An object for customizing the appearance of a navigation bar.
Configure it:
largeTitleAppearance.configureWithOpaqueBackground()
"Opaque" here because we want to set colorised image (but in practice it doesn't matter, what configure will you set)
Set background image:
largeTitleAppearance.backgroundImage = UIImage(named: "BackgroundImage.png") // Set here image that you need
Assign our largeTitleAppearance object to both standardAppearance and scrollEdgeAppearance navigationBar's fields:
self.navigationBar.standardAppearance = largeTitleAppearance // For large-navigationBar condition when it is collapsed
self.navigationBar.scrollEdgeAppearance = largeTitleAppearance // For large-navigationBar condition when it is expanded
Apple documentation:
.standardAppearance - The appearance settings for a standard-height navigation bar.
.scrollEdgeAppearance - The appearance settings to use when the edge of any scrollable content reaches the matching edge of the navigation bar.
This helped to me: https://sarunw.com/posts/uinavigationbar-changes-in-ios13/#going-back-to-old-style
In iOS 11 you no more need set BackgroundImage(Remove its declaration) if you use large titles. Instead you need use BarTintColor.
class CustomNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.navigationBar.tintColor = UIColor(red:1, green:1, blue:1, alpha:0.6)
self.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
if #available(iOS 11.0, *) {
self.navigationBar.prefersLargeTitles = true
self.navigationItem.largeTitleDisplayMode = .automatic
self.navigationBar.largeTitleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
self.navigationBar.barTintColor = UIColor(red:1, green:1, blue:1, alpha:1)
}
else {
self.navigationBar.setBackgroundImage(#imageLiteral(resourceName: "navigationBarBackground"), for: .default)
}
self.navigationBar.shadowImage = #imageLiteral(resourceName: "navigationBarShadow")
self.navigationBar.isTranslucent = false
}
}
Try this code (Swift 4.0):
in viewDidLoad()
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
if #available(iOS 11.0, *) {
self.navigationController?.navigationBar.prefersLargeTitles = true
self.navigationItem.largeTitleDisplayMode = .automatic
self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
} else {
//iOS <11.0
}
self.title = "Title"
self.navigationController?.navigationBar.barTintColor = UIColor(patternImage: #imageLiteral(resourceName: "nav_bg"))
self.navigationController?.navigationBar.isTranslucent = false
Piggybacking on oldrinmendez's answer - that solution works perfect for a horizontal gradient.
For a VERTICAL gradient, I was able to use the same function from oldrinmendez's answer by calling it again in scrollViewDidScroll. This continually adjusts the height of the gradient image as the user scrolls.
Start with the function from oldrinmendez :
func imageWithGradient(startColor:UIColor, endColor:UIColor, size:CGSize, horizontally:Bool) -> UIImage? {
let gradientLayer = CAGradientLayer()
gradientLayer.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
gradientLayer.colors = [startColor.cgColor, endColor.cgColor]
if horizontally {
gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.5)
gradientLayer.endPoint = CGPoint(x: 1.0, y: 0.5)
} else {
gradientLayer.startPoint = CGPoint(x: 0.5, y: 0)
gradientLayer.endPoint = CGPoint(x: 0.5, y: 1)
}
UIGraphicsBeginImageContext(gradientLayer.bounds.size)
gradientLayer.render(in: UIGraphicsGetCurrentContext()!)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
Create an update function to call it with the options you want:
func updateImageWithGradient() {
let navBarHeight = self.navigationController?.navigationBar.frame.size.height
let statusBarHeight = UIApplication.shared.statusBarFrame.height
let heightAdjustment: CGFloat = 2
let gradientHeight = navBarHeight! + statusBarHeight + heightAdjustment
let bgimage = imageWithGradient(startColor: UIColor.red, endColor: UIColor.orange, size: CGSize(width: UIScreen.main.bounds.size.width, height: gradientHeight), horizontally: false)
navigationController?.navigationBar.barTintColor = UIColor(patternImage: bgimage!)
}
Finally add the update function to scrollViewDidScroll & ViewDidApper: Use ViewDidAppear so the correct navigation bar height is returned
override func viewDidAppear(_ animated: Bool) {
updateImageWithGradient()
}
override func scrollViewDidScroll(_ scrollView: UIScrollView) {
DispatchQueue.main.async {
updateImageWithGradient()
}
}
In Xamarin it would be like this:
this.NavigationBar.BackgroundColor = UIColor.Clear;
var gradientLayer = new CAGradientLayer
{
Frame = new CGRect(0, 0, UIApplication.SharedApplication.StatusBarFrame.Width,
UIApplication.SharedApplication.StatusBarFrame.Height + this.NavigationBar.Frame.Height),
Colors = new CGColor[]
{Constants.Defaults.Navigation.RealBlueColor.ToCGColor(), Constants.Defaults.Navigation.RealBlueColor.ToCGColor()}
};
UIGraphics.BeginImageContext(gradientLayer.Bounds.Size);
gradientLayer.RenderInContext((UIGraphics.GetCurrentContext()));
UIImage image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
this.View.Layer.InsertSublayer(gradientLayer, 0);
this.NavigationBar.BarTintColor = UIColor.FromPatternImage(image);
The this.View.Layer.Insert is optional. I need it when I'm "curling" up and down an image on the NavigationBar
Changing the barTint didn't work for me so I change the layer inside navigationBar
navigationBar.layer.backgroundColor = UIColor(patternImage:
UIImage(named: "BG-Roof1")!.resizableImage(withCapInsets:
UIEdgeInsets(top: 0, left: 0, bottom: 10, right: 0), resizingMode: .stretch)).cgColor
I have transparent navigation bar with a background image for view controller, But when I add a bar button item to navigation bar, it becomes like in the second picture. How do I have bar button items also fully transparent navigation bar.
I used these code below to make the navigation bar transparent;
extension UINavigationController {
public func presentTransparentNavigationBar() {
navigationBar.setBackgroundImage(UIImage(), forBarMetrics:UIBarMetrics.Default)
navigationBar.translucent = true
navigationBar.shadowImage = UIImage()
setNavigationBarHidden(false, animated:true)
}
public func hideTransparentNavigationBar() {
setNavigationBarHidden(true, animated:false)
navigationBar.setBackgroundImage(UINavigationBar.appearance().backgroundImageForBarMetrics(UIBarMetrics.Default), forBarMetrics:UIBarMetrics.Default)
navigationBar.translucent = UINavigationBar.appearance().translucent
navigationBar.shadowImage = UINavigationBar.appearance().shadowImage
}
}
This should create a transparent UINavigationBar with items in it. It's currently working fine for me.
let navigationBarAppearace = UINavigationBar.appearance()
navigationBarAppearace.tintColor = UIColor.whiteColor()
navigationBarAppearace.translucent = true
navigationBarAppearace.shadowImage = UIImage()
navigationBarAppearace.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0)
navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName : UIColor.whiteColor()]
navigationBarAppearace.setBackgroundImage(UIImage(), forBarMetrics: .Default)
Try:
if let navBar = self.navigationController?.navigationBar {
extendedLayoutIncludesOpaqueBars = true
navigationBar.translucent = true
navigationBar.backgroundColor = UIColor.clearColor()
navigationBar.setBackgroundImage(UIImage(), forBarMetrics: .Default)
navigationBar.shadowImage = UIImage()
}
I have a UISearchController in my tableView. Also note that there is a navigation item in the top.
My issue is that i have a black border in the top and bottom when I load the page, however, it is not present when I click the search bar.
Search bar on page load (with black border):
After clicking on search bar (no black border):
Here is the code related:
let searchController = UISearchController(searchResultsController: nil)
in viewDidLoad:
searchController.searchBar.barTintColor = UIColor.redColor()
searchController.searchBar.tintColor = UIColor.whiteColor()
I followed several similar questions and made the following changes after the above lines in viewDidLoad():
1) searchController.searchBar.backgroundImage = UIImage()
2) searchController.searchBar.searchBarStyle = UISearchBarStyle.Minimal
3) searchController.searchBar.layer.borderColor = UIColor.clearColor().CGColor
4)
searchBar.layer.borderWidth = 1
searchBar.layer.borderColor = UIColor.whiteColor().CGColor
None worked. Is this an issue with the order I am using the code, or how would I get rid of these lines?
Fixed this after a lot of search. Here's how i did it. In viewDidLoad, added the following lines:
self.searchController.searchBar.translucent = false
self.searchController.searchBar.backgroundImage = UIImage()
self.searchController.searchBar.barTintColor = UIColor.redColor()
self.searchController.searchBar.tintColor = UIColor.whiteColor()
After that in app.delegate file in didFinishLaunchingWithOptions added the following code:
let backgroundColor = UIColor.redColor()
let foregroundColor = UIColor.whiteColor()
UIApplication.sharedApplication().statusBarStyle = .LightContent
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(backgroundColor.toImage(), forBarMetrics: UIBarMetrics.Default)
UINavigationBar.appearance().tintColor = foregroundColor
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName: foregroundColor]
Also need this extension on the app.delegate file (place outside of the class)
extension UIColor{
func toImage() -> UIImage {
let rect = CGRectMake(0, 0, 1, 1)
UIGraphicsBeginImageContextWithOptions(rect.size, true, 0)
self.setFill()
UIRectFill(rect)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
}
(Thanks to Noel for the extension taken from this answer)
And finally, the desired result:
I think it is the navigation bar you need to remove the border for.
How to hide iOS7 UINavigationBar 1px bottom line
For iOS 13 / Swift 5; the following line makes the trick:
UISearchBar.setBackgroundImage(UIImage(), for: .any, barMetrics: .default)
Cheers!
I have the following code to make the navigation bar transparent but while still displaying the back button, this works on all versions of iOS but its stopped working with the iOS 10 beta
navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
navigationBar.shadowImage = UIImage()
navigationBar.isTranslucent = true
Has something changed with iOS 10 in this area?
Note its not possible to use navigationBar.isHidden as this would result in the navigation bar back button and title etc. disappearing also.
I don't know what has changed in iOS 10 to stop the previous code from working, but to fix it I created a transparent image (it only needs to be one pixel in dimension) and used the following code to make the navigation bar transparent (but still showing the back navigation button).
let transparentPixel = UIImage(named: "TransparentPixel")
navigationBar.setBackgroundImage(transparentPixel, for: UIBarMetrics.default)
navigationBar.shadowImage = transparentPixel
navigationBar.backgroundColor = UIColor.clear()
navigationBar.isTranslucent = true
Incidentally, if you want to change the color of the navigation bar, you can use the same principle:
let redPixel = UIImage(named: "RedPixel")
navigationBar.setBackgroundImage(redPixel, for: UIBarMetrics.default)
navigationBar.shadowImage = redPixel
navigationBar.isTranslucent = false
The solution #Essence provided works perfectly!
This is what I am using even to create the 1px transparent image by code:
class MainClass: UIViewController {
let transparentPixel = UIImage.imageWithColor(color: UIColor.clear)
override func viewWillAppear(_ animated: Bool) {
drawCustomNavigationBar()
}
func drawCustomNavigationBar() {
let nav = (self.navigationController?.navigationBar)!
nav.setBackgroundImage(transparentPixel, for: UIBarMetrics.default)
nav.shadowImage = transparentPixel
nav.isTranslucent = true
}
}
extension UIImage {
class func imageWithColor(color: UIColor) -> UIImage {
let rect = CGRect(origin: CGPoint(x: 0, y:0), size: CGSize(width: 1, height: 1))
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()!
context.setFillColor(color.cgColor)
context.fill(rect)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image!
}
}
Swift 3.x
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.backgroundColor = .clear
self.navigationController?.navigationBar.isTranslucent = true