I have a navigation bar with an UIImage. I want to change the colour of it, but when I use my code, the default black colour is used. My code is below.
override func viewDidLoad() {
super.viewDidLoad()
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 26, height: 26))
imageView.contentMode = .ScaleAspectFit
let image = UIImage(named: "pinpoint.png")
imageView.image = image
navigationItem.titleView = imageView
imageView.image = UIImage(named: "pinpoint.png")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
imageView.tintColor = UIColor(red: 22.0/255.0, green: 40.0/255.0, blue: 86.0/255.0, alpha: 1.0)
}
The colour I want to use is on the last line of the snippet.
You can try this way:
override func viewDidLoad() {
super.viewDidLoad()
let imageView = UIImageView(image: UIImage(named:"pinpoint.png")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate))
imageView.contentMode = .ScaleAspectFit
navigationItem.titleView = imageView
imageView.tintColor = UIColor(red: 22.0/255.0, green: 40.0/255.0, blue: 86.0/255.0, alpha: 1.0)
}
Hope this help. :)
Related
I want to display a little circle point as indicator to the selected UITabBarItem. How can i do this?
I use a custom UITabBarController. It looks like this:
import UIKit
class EventTabBar: UITabBarController {
override func awakeFromNib() {
tabBar.barTintColor = UIColor.white
tabBar.tintColor = UIColor(red: 79/255, green: 122/255, blue: 198/255, alpha: 1)
tabBar.unselectedItemTintColor = UIColor(red: 198/255, green: 203/255, blue: 209/255, alpha: 1)
tabBar.isTranslucent = false
tabBar.shadowImage = UIImage()
tabBar.backgroundImage = UIImage()
//Add Shadow to TabBar
tabBar.layer.shadowOpacity = 0.12
tabBar.layer.shadowOffset = CGSize(width: 0, height: 2)
tabBar.layer.shadowRadius = 8
tabBar.layer.shadowColor = UIColor.black.cgColor
tabBar.layer.masksToBounds = false
}
}
Can i use the selectionIndicatorImage to do this?
Hope you can help me. Thanks for your answer
let size = CGSize(width: tabController.tabBar.frame.width / (amount of items),
height: tabController.tabBar.frame.height)
let dotImage = UIImage().createSelectionIndicator(color: .blue, size: size, lineHeight: 7)
tabController.tabBar.selectionIndicatorImage = dotImage
-
extension UIImage {
func createSelectionIndicator(color: UIColor, size: CGSize, lineHeight: CGFloat) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
let innerRect = CGRect(x: (size.width/2) - lineHeight/2,
y: size.height - lineHeight - 2,
width: lineHeight,
height: lineHeight)
let path = UIBezierPath(roundedRect: innerRect, cornerRadius: lineHeight/2)
path.fill()
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image!
}
}
It's pretty easy actually. TabBarButton has two properties to set image, one is TabBarItem.image and another is TabBarItem.selectedImage set an image without the circle point for TabBarItem.image property and set an image with circle point for TabBarItem.selectedImage property.
If you want to set only the circle point for selected state, set the normal image property to UIImage(). Hope this solves the problem.
scanTabBarItem.image = UIImage.fontAwesomeIcon(name: .qrcode, textColor: .white, size: CGSize(width: 30, height: 30))
scanTabBarItem.selectedImage = UIImage.fontAwesomeIcon(name: .addressBook, textColor: .white, size: CGSize(width: 30, height: 30))
if not to show any image normally,
scanTabBarItem.image = UIImage()
I have a UIViewController with a navigation bar on top. I want to replace the title with a segmented control.
class AViewController: UIViewController
{
private var navigationbar = UINavigationBar();
private var segment = UISegmentedControl();
override func viewDidLoad()
{
super.viewDidLoad()
// Do any additional setup after loading the view.
buildThebar();
}
func buildThebar()
{
navigationbar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: self.view.bounds.width, height: 64));
navigationbar.backgroundColor = UIColor(red: 200/255, green: 200/255, blue: 200/255, alpha: 1.0);
segment = UISegmentedControl(items: ["Testy", "Tests"]);
segment.sizeToFit();
segment.tintColor = UIColor(red: 104/255, green: 90/255, blue: 132/255, alpha: 1.0);
let cancel = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelbar(sender:)));
cancel.tintColor = UIColor(red: 104/255, green: 90/255, blue: 132/255, alpha: 1.0);
let title = UINavigationItem(title: "Testing");
title.leftBarButtonItem = cancel;
navigationbar.setItems([title], animated: false);
self.navigationItem.titleView = segment;
// self.navigationItem.leftBarButtonItem = cancel;
self.view.addSubview(navigationbar);
}
Ok found issue.
What you missed is setting titleView to the navigation item you created.
title.titleView = segment
You are adding titleView to navigation item self.navigationItem.titleView = segment; but you need to set it to your navigationItem which you are passing to your navigation bar.
Final code
func buildThebar()
{
navigationbar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: self.view.bounds.width, height: 64));
navigationbar.backgroundColor = UIColor(red: 200/255, green: 200/255, blue: 200/255, alpha: 1.0);
segment = UISegmentedControl(items: ["Testy", "Tests"]);
segment.sizeToFit();
segment.tintColor = UIColor(red: 104/255, green: 90/255, blue: 132/255, alpha: 1.0);
let cancel = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: nil);
cancel.tintColor = UIColor(red: 104/255, green: 90/255, blue: 132/255, alpha: 1.0);
let title = UINavigationItem(title: "Testing"); //better let title = UINavigationItem()
title.leftBarButtonItem = cancel;
title.titleView = segment
navigationbar.setItems([title], animated: false);
// self.navigationItem.leftBarButtonItem = cancel;
self.view.addSubview(navigationbar);
}
EDIT:
There is another issue with how you are setting navigation bar frame. O/P with your code looks like
I believe thats not what you want! the reason why it looks like that is because your frame starts from y = 0 but in iPhone and iPads portait mode there is a status bar on top which consumes variable amount of space based on various condition (Usually people hardcode or assume it to be 20 but iPhone X the height status bar might vary and even in normal iPhones when you receive a call status bar height changes). Its always better to use auto layout and safe margin to add navigation bar to View.
But if you really wanna hard code frames then you can use
navigationbar = UINavigationBar(frame: CGRect(x: 0, y: 20, width: self.view.bounds.width, height: 44));
O/P looks like
Hope it helps.
let title = UINavigationItem()
title.titleView = segment
title.rightBarButtonItem = cancel
navigationbar.setItems([title], animated: false);
self.view.addSubview(navigationbar);
Just a matter of order of assignment of the objects in operation.
I am trying to make my Tab Bar in my tab bar controller to have a low opacity background, so it is semi transparent, i am trying to do this programatically, however the background changes to the correct color, but always appears solid, with no transparency.
Here is the code in my TabBarViewController
class TabBarViewController: UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
self.tabBar.unselectedItemTintColor = UIColor(red: 17.0/255.0, green: 70.0/255.0, blue: 95.0/255.0, alpha: 0.4)
self.tabBar.barTintColor = UIColor(red: 17.0/255.0, green: 70.0/255.0, blue: 95.0/255.0, alpha: 0.5)
// Do any additional setup after loading the view.
}
}
For such a case, you should generate a customized UIImage to the tab bar backgroundimage property.
Let's assume that your desired color for your tab bar -that should be transparent- is black, you could implement in your custom UITabBarController:
class TabBarViewController: UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
let transperentBlackColor = UIColor(displayP3Red: 0, green: 0, blue: 0, alpha: 0.5)
let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0.0)
transperentBlackColor.setFill()
UIRectFill(rect)
if let image = UIGraphicsGetImageFromCurrentImageContext() {
tabBar.backgroundImage = image
}
UIGraphicsEndImageContext()
}
}
So, as an Output, if we assumed that the background color of your view controller is blue, it should looks like:
As shown, the tab bar is not purely black, it contains transparency (0.5) as expected.
Also, for checking how you could generate a solid-color UIImage, you could check this SO answer : Create UIImage with solid color in Swift.
Just replace barTintColor with backgroundColor.
override func viewDidLoad() {
super.viewDidLoad()
self.tabBar.unselectedItemTintColor = UIColor(red: 17.0/255.0, green: 70.0/255.0, blue: 95.0/255.0, alpha: 0.4)
self.tabBar.backgroundColor = UIColor(red: 17.0/255.0, green: 70.0/255.0, blue: 95.0/255.0, alpha: 0.5)
// Do any additional setup after loading the view.
}
private func setTabbarOpacity() {
let transperentBlackColor = UIColor(displayP3Red: 0, green: 0, blue: 0, alpha: 0.75)
let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0.0)
transperentBlackColor.setFill()
UIRectFill(rect)
if let image = UIGraphicsGetImageFromCurrentImageContext() {
tabBar.backgroundImage = image
}
UIGraphicsEndImageContext()
}
The shadow is appearing on top of the navigation bar. Is there anyway to move the shadow underneath the bar or add some code so it doesn't discolor the bar?
This is the code I use in my navigation controller:
import UIKit
class navigationController:UINavigationController, UIViewControllerTransitioningDelegate{
override func viewDidLoad()
{
var appblue = UIColor(red: 109/255, green: 208/255, blue:247/255, alpha: 1.0)
self.navigationBar.barTintColor = appblue
self.navigationBar.layer.masksToBounds = false
self.navigationBar.layer.shadowColor = UIColor.black.cgColor
self.navigationBar.layer.shadowOpacity = 0.7
self.navigationBar.layer.shadowOffset = CGSize(width: 0, height: 2.0)
self.navigationBar.layer.shadowRadius = 4
}
}
and this is what it looks like:
When it should be this color:
Any suggestions?
This is what im trying to make it look like(photo shopped picture):
(the top bar bottom shadow while retaining the second bars color)
Added a image view with a gradient to the bottom of the bar to accomplish what I was going for, Thanks to #Anbu.Karthik for linking another question that I was able to adapt. This is my current code:
import UIKit
class navigationController:UINavigationController, UIViewControllerTransitioningDelegate{
override func viewDidLoad()
{
var appblue = UIColor(red: 109/255, green: 208/255, blue:247/255, alpha: 1.0)
self.navigationBar.barTintColor = appblue
self.navigationBar.layer.masksToBounds = false
var yPosition = self.navigationBar.layer.frame.height
var rectWidth = self.navigationBar.layer.frame.width
let gradient = CAGradientLayer()
let bottomShadow: UIImageView = UIImageView()
bottomShadow.frame = CGRect(x: 0, y: yPosition, width: rectWidth, height: 8)
gradient.frame = bottomShadow.bounds
gradient.colors = [UIColor.lightGray.cgColor, UIColor(white: 1, alpha: 0).cgColor]
navigationBar.addSubview(bottomShadow)
bottomShadow.layer.insertSublayer(gradient, at: 0)
}
}
This is what the project currently looks like
And this is the code that I use
func styleNavBar() {
let navigationBarAppearace = UINavigationBar.appearance()
navigationBarAppearace.tintColor = UIColor(red:1.0, green:1.0, blue:1.0, alpha:1.0)
navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor(red:1.00, green:1.00, blue:1.00, alpha:1.0)]
navigationBarAppearace.translucent = true
navigationBarAppearace.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.3)
navigationBarAppearace.setBackgroundImage(UIImage(), forBarMetrics: .Default)}
I have tried to remove the following code, but then it looks like this.
navigationBarAppearace.setBackgroundImage(UIImage(), forBarMetrics: .Default)
My question is, how do I get the navbar to fill up to the top? and still have the same look
First, create an extension for UIImage which create image with solid color of specified size.
Keep this extension in any ViewController at class label
extension UIImage {
class func imageWithColor(color: UIColor, size: CGSize) -> UIImage {
let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return image
}
}
then use the below method to customise your navbar
func styleNavBar() {
let navigationBarAppearace = UINavigationBar.appearance()
navigationBarAppearace.tintColor = UIColor(red:1.0, green:1.0, blue:1.0, alpha:1.0)
navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor(red:1.00, green:1.00, blue:1.00, alpha:1.0)]
navigationBarAppearace.isTranslucent = true
let colorImage = UIImage.imageWithColor(color: UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.3), size: CGSize(width: UIScreen.main.bounds.width, height: 64))
navigationBarAppearace.setBackgroundImage(colorImage, for: .default)
}
Hope this will solve your problem.
I'm using this code on my UINavigationBar to make it transparent. You can adjust it to your needs. In the picture there's a searchController in the titleView
if let topBar = self.navigationController?.navigationBar {
topBar.setBackgroundImage(UIImage(), forBarMetrics: .Default)
topBar.shadowImage = UIImage()
topBar.barTintColor = UIColor.clearColor()
topBar.tintColor = UIColor.whiteColor()
topBar.translucent = true
}
Here's what it looks like: