I am trying to get a navigation bar similar to the one in iOS messages app. This is what I have, and it creates a bit of a circle shape but gets cut off. If you were to recreate the centered image from Messages how would you?
let imageView = UIImageView(image: UIImage(named: "test-image"))
imageView.contentMode = .scaleAspectFit
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
imageView.frame = titleView.bounds
imageView.layer.masksToBounds = true
imageView.layer.cornerRadius = imageView.frame.height / 2
titleView.addSubview(imageView)
self.navigationItem.titleView = titleView
The current outcome with this snippet:
The desired outcome:
Tested solutions In dark mode:
Please excuse my eggs ;) It's my favorite test pic
Set image view content mode .scaleAspectFill
imageView.contentMode = .scaleAspectFill
The following is what I have done.
I use two functions to work with an image. The makeCutout function creates a square cutout based on the height of an image of your selection. The position of the cutout is placed at the center of the source image. (See let cutoutRect = ...) The second one, the makeCircularImage function, makes the cutout image circular. Note that I'm assuming the original image is horizontally-long, which means that the diameter of the cutout will be the height of the image.
import UIKit
class ViewController: UIViewController {
// MARK: - Life cycle
override func viewDidLoad() {
super.viewDidLoad()
if let image = UIImage(named: "jenniferGarner.jpg") {
let imageWidth = image.size.width
let imageHeight = image.size.height
let cutoutRect = CGRect(origin: CGPoint(x: (imageWidth - imageHeight) / 2.0, y: 0.0), size: CGSize(width: imageHeight, height: imageHeight))
if let cutoutImage = makeCutout(image: image, rect: cutoutRect) {
/* making it a circular image */
if let circleImage = makeCircularImage(sourceImage: cutoutImage, diameter: cutoutImage.size.height) {
testImageView.isHidden = true
let imageView = UIImageView(image: circleImage)
imageView.contentMode = .scaleAspectFit
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
//titleView.backgroundColor = UIColor.green
imageView.frame = titleView.bounds
imageView.layer.masksToBounds = true
imageView.layer.cornerRadius = imageView.frame.height / 2
titleView.addSubview(imageView)
self.navigationItem.titleView = titleView
}
}
}
}
// MARK: - Making a cutout image
func makeCutout(image: UIImage, rect: CGRect) -> UIImage? {
if let cgImage = image.cgImage {
let contextImage: UIImage = UIImage(cgImage: cgImage)
// Create bitmap image from context using the rect
var croppedContextImage: CGImage? = nil
if let contextImage = contextImage.cgImage {
if let croppedImage = contextImage.cropping(to: rect) {
croppedContextImage = croppedImage
}
}
// Create a new image based on the imageRef and rotate back to the original orientation
if let croppedImage: CGImage = croppedContextImage {
let image: UIImage = UIImage(cgImage: croppedImage, scale: image.scale, orientation: image.imageOrientation)
return image
}
}
return nil
}
func makeCircularImage(sourceImage: UIImage, diameter: CGFloat) -> UIImage? {
let imageView = UIImageView(image: sourceImage)
let layer = imageView.layer
layer.masksToBounds = true
layer.cornerRadius = diameter / 2.0
UIGraphicsBeginImageContext(imageView.bounds.size)
layer.render(in: UIGraphicsGetCurrentContext()!)
if let finalImage = UIGraphicsGetImageFromCurrentImageContext() {
UIGraphicsEndImageContext()
return finalImage
}
return nil
}
}
I have Jeniffer Garner as a guest as shown below. The source image size is 480 px X 180 px.
The following is the final work with an iPhone simulator with the dark mode.
I'm calling a JSQMessageViewController and adding an image as the title but it's not centred due to the offset caused by the Back left-button.
Here's my code for adding the image:
let imageView = UIImageView()
imageView.frame.size.width = 40
imageView.frame.size.height = 40
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "avatar_example")
imageView.image = image
navigationItem.titleView = imageView
Thanks :)
Are you sure that the problem is in JSQMessageViewController? Maybe you just need to use standard sizes from title view (44*44) for alignment.
let imageView = UIImageView(image: UIImage(named: "avatar_example"))
imageView.contentMode = .scaleAspectFit
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
imageView.frame = titleView.bounds
titleView.addSubview(imageView)
self.navigationItem.titleView = titleView
You need to actually get the width and height of the UINavigationBar and center the image accordingly. Try this
guard let bar = navigationController.navigationBar else { return }
let bannerWidth = bar.frame.size.width
let bannerHeight = bar.frame.size.height
// centers image vertically & horizontally
let bannerX = bannerWidth / 2 - imageView.frame.width / 2
let bannerY = bannerHeight / 2 - imageView.frame.height / 2
imageView.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth, height: bannerHeight)
imageView.contentMode = .scaleAspectFit
navigationItem.titleView = logoImageView
I am cropping a UIImage by using UIGraphicsGetCurrentContext and then saving it to cache. I then show that UIImage as the image of one of my tab bar items. This works, however, the scale factor of the image is an issue. If I use UIGraphicsBeginImageContextWithOptions with the scale set to zero, this correctly crops it using the scale factor of the screen. However, when I set the UITabBarItem image, it seems to ignore the fact that the image should be scaled.
My code for scaling:
extension UIImage {
func scaledImage(withSize size: CGSize, withBorder: Bool) -> UIImage {
let imageView = UIImageView(image: self)
imageView.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
imageView.contentMode = .scaleAspectFit
let layer = imageView.layer
layer.masksToBounds = true
layer.cornerRadius = size.width/2
if withBorder {
layer.borderColor = Styles.Colours.blue.colour.cgColor
layer.borderWidth = 2
}
UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, 1) // Notice I've set the scale factor to 1 here for now. If I set it to 0 the image is too large on the tab bar
defer { UIGraphicsEndImageContext() }
layer.render(in: UIGraphicsGetCurrentContext()!)
return UIGraphicsGetImageFromCurrentImageContext()!
}
}
Used like this:
let defaultImage = image?.scaledImage(withSize: CGSize(width: 25, height: 25), withBorder: false)
Then I set the tab bar item like this:
self.tabBar.items?.last?.image = defaultImage.withRenderingMode(.alwaysOriginal)
If I was to set a UIImage from my Assets, then it would take into account the scale factor. How do I fix this? Thanks!
Solved it by converting the UIImage to one that specifically defines the scale like this:
let scaledSelectedImage = UIImage(data: UIImagePNGRepresentation(image)!, scale: UIScreen.main.scale)
UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, 1) is saying that you want the image context to be set at a scale of #1x. If you set it to 0 it uses the screen's native scale:
UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, 0)
I have a logo in Swift 3 with the below code, but when I add a Bar button Item to the left, it pushes the logo across. As below:
CODE:
let logo = UIImage(named: "logo") as UIImage?
let imageView = UIImageView(image:logo)
imageView.frame.size.width = 100;
imageView.frame.size.height = 22;
imageView.contentMode = UIViewContentMode.scaleAspectFit
self.navigationItem.titleView = imageView
How do i move the logo back into the centre??
You can set frame like this for titleView. Change x and y positions as per your requirement.
let imageView = UIImageView(image: UIImage(named: "test"))
imageView.contentMode = UIViewContentMode.scaleAspectFit
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
imageView.frame = titleView.bounds
titleView.addSubview(imageView)
self.navigationItem.titleView = titleView
I want to customize my app's look by using a logo image as the navigation bar's title, instead of plain text. When I use this code
let logo = UIImage(named: "logo.png")
self.navigationItem.titleView = logo;
I get the error "UIImage is not convertible to UIView". How can I do this correctly?
Put it inside an UIImageView
let logo = UIImage(named: "logo.png")
let imageView = UIImageView(image:logo)
self.navigationItem.titleView = imageView
I use this. It works in iOS 8
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let image = UIImage(named: "YOURIMAGE")
navigationItem.titleView = UIImageView(image: image)
}
And here is an example how you can do it with CGRect.
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 38, height: 38))
imageView.contentMode = .ScaleAspectFit
let image = UIImage(named: "YOURIMAGE")
imageView.image = image
navigationItem.titleView = imageView
}
Hope this will help.
For swift 4 and you can adjust imageView size
let logoContainer = UIView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "your_image")
imageView.image = image
logoContainer.addSubview(imageView)
navigationItem.titleView = logoContainer
I tried #Jack's answer above, the logo did appear however the image occupied the whole Navigation Bar. I wanted it to fit.
Swift 4, Xcode 9.2
1.Assign value to navigation controller, UIImage. Adjust size by dividing frame and Image size.
func addNavBarImage() {
let navController = navigationController!
let image = UIImage(named: "logo-signIn6.png") //Your logo url here
let imageView = UIImageView(image: image)
let bannerWidth = navController.navigationBar.frame.size.width
let bannerHeight = navController.navigationBar.frame.size.height
let bannerX = bannerWidth / 2 - (image?.size.width)! / 2
let bannerY = bannerHeight / 2 - (image?.size.height)! / 2
imageView.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth, height: bannerHeight)
imageView.contentMode = .scaleAspectFit
navigationItem.titleView = imageView
}
Add the function right under viewDidLoad()
addNavBarImage()
Note on the image asset. Before uploading, I adjusted the logo with extra margins rather than cropped at the edges.
Final result:
You can use custom UINavigationItem so, you only need to change "Navigation Item" as YourCustomClass on the Main.storyboard.
In Swift 3
class FixedImageNavigationItem: UINavigationItem {
private let fixedImage : UIImage = UIImage(named: "your-header-logo.png")!
private let imageView : UIImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 37.5))
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
imageView.contentMode = .scaleAspectFit
imageView.image = fixedImage
self.titleView = imageView
}
}
Here is a handy function for Swift 4.2, shows an image with title text:-
override func viewDidLoad() {
super.viewDidLoad()
//Sets the navigation title with text and image
self.navigationItem.titleView = navTitleWithImageAndText(titleText: "Dean Stanley", imageName: "online")
}
func navTitleWithImageAndText(titleText: String, imageName: String) -> UIView {
// Creates a new UIView
let titleView = UIView()
// Creates a new text label
let label = UILabel()
label.text = titleText
label.sizeToFit()
label.center = titleView.center
label.textAlignment = NSTextAlignment.center
// Creates the image view
let image = UIImageView()
image.image = UIImage(named: imageName)
// Maintains the image's aspect ratio:
let imageAspect = image.image!.size.width / image.image!.size.height
// Sets the image frame so that it's immediately before the text:
let imageX = label.frame.origin.x - label.frame.size.height * imageAspect
let imageY = label.frame.origin.y
let imageWidth = label.frame.size.height * imageAspect
let imageHeight = label.frame.size.height
image.frame = CGRect(x: imageX, y: imageY, width: imageWidth, height: imageHeight)
image.contentMode = UIView.ContentMode.scaleAspectFit
// Adds both the label and image view to the titleView
titleView.addSubview(label)
titleView.addSubview(image)
// Sets the titleView frame to fit within the UINavigation Title
titleView.sizeToFit()
return titleView
}
this worked for me in Sept 2015 - Hope this helps someone out there.
// 1
var nav = self.navigationController?.navigationBar
// 2 set the style
nav?.barStyle = UIBarStyle.Black
nav?.tintColor = UIColor.yellowColor()
// 3
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .ScaleAspectFit
// 4
let image = UIImage(named: "logo.png")
imageView.image = image
// 5
navigationItem.titleView = imageView
I have written this for iOS 10 & iOS 11 and it worked for me:
extension UINavigationBar {
func setupNavigationBar() {
let titleImageWidth = frame.size.width * 0.32
let titleImageHeight = frame.size.height * 0.64
var navigationBarIconimageView = UIImageView()
if #available(iOS 11.0, *) {
navigationBarIconimageView.widthAnchor.constraint(equalToConstant: titleImageWidth).isActive = true
navigationBarIconimageView.heightAnchor.constraint(equalToConstant: titleImageHeight).isActive = true
} else {
navigationBarIconimageView = UIImageView(frame: CGRect(x: 0, y: 0, width: titleImageWidth, height: titleImageHeight))
}
navigationBarIconimageView.contentMode = .scaleAspectFit
navigationBarIconimageView.image = UIImage(named: "image")
topItem?.titleView = navigationBarIconimageView
}
}
Swift 5.1+, Xcode 13+
Sometimes if your image is in high resolution then, imageView shifts from centre, I would suggest using this method
lazy var navigationTitleImageView = UIImageView()
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationTitleImageView.image = logo
self.navigationTitleImageView.contentMode = .scaleAspectFit
self.navigationTitleImageView.translatesAutoresizingMaskIntoConstraints = false
if let navC = self.navigationController{
navC.navigationBar.addSubview(self.navigationTitleImageView)
self.navigationTitleImageView.centerXAnchor.constraint(equalTo: navC.navigationBar.centerXAnchor).isActive = true
self.navigationTitleImageView.centerYAnchor.constraint(equalTo: navC.navigationBar.centerYAnchor, constant: 0).isActive = true
self.navigationTitleImageView.widthAnchor.constraint(equalTo: navC.navigationBar.widthAnchor, multiplier: 0.2).isActive = true
self.navigationTitleImageView.heightAnchor.constraint(equalTo: navC.navigationBar.widthAnchor, multiplier: 0.088).isActive = true
}
}
and viewWillDisappear()
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.navigationTitleImageView.removeFromSuperview()
}
or else just reduce the image size
If you'd prefer to use autolayout, and want a permanent fixed image in the navigation bar, that doesn't animate in with each screen, this solution works well:
class CustomTitleNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
let logo = UIImage(named: "MyHeaderImage")
let imageView = UIImageView(image:logo)
imageView.contentMode = .scaleAspectFit
imageView.translatesAutoresizingMaskIntoConstraints = false
navigationBar.addSubview(imageView)
navigationBar.addConstraint (navigationBar.leftAnchor.constraint(equalTo: imageView.leftAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.rightAnchor.constraint(equalTo: imageView.rightAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.topAnchor.constraint(equalTo: imageView.topAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.bottomAnchor.constraint(equalTo: imageView.bottomAnchor, constant: 0))
}
Programmatically could be done like this.
private var imageView: UIView {
let bannerWidth = navigationBar.frame.size.width * 0.5 // 0.5 its multiplier to get correct image width
let bannerHeight = navigationBar.frame.size.height
let view = UIView()
view.backgroundColor = .clear
view.frame = CGRect(x: 0, y: 0, width: bannerWidth, height: bannerHeight)
let image = UIImage(named: "your_image_name")
let imageView = UIImageView(image: image)
imageView.contentMode = .scaleAspectFit
imageView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
view.addSubview(imageView)
return view
}
The just change titleView
navigationItem.titleView = imageView
let's do try and checkout
let image = UIImage(named: "Navbar_bg.png")
navigationItem.titleView = UIImageView(image: image)
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .ScaleAspectFit
let imageView = UIImageView(frame: (CGRect(x: 0, y: 0, width: 40, height:
40)))
imageView.contentMode = .scaleAspectFit
let image = UIImage (named: "logo") // logo is your NPG asset
imageView.image = image
self.navigationItem.titleView = imageView
Works for me in swift 4 (square image 40x40)
let imageView = UIImageView()
imageView.frame.size.width = 40
imageView.frame.size.height = 40
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "YOUR_IMAGE_NAME")
imageView.image = image
navigationItem.titleView = imageView
If you want other measures, try
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 100.5)))
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "YOUR_IMAGE_NAME")
imageView.image = image
navigationItem.titleView = imageView
I hope it serves you. It works for me.
Objective-C version:
//create the space for the image
UIImageView *myImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 256, 144)];
//bind the image with the ImageView allocated
myImage.image = [UIImage imageNamed:#"logo.png"];
//add image into imageview
_myNavigationItem.titleView = myImage;
Just in case someone (like me) had arrived here looking for the answer in Objective-C.
This worked for me... try it
let image : UIImage = UIImage(named: "LogoName")
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
imageView.contentMode = .scaleAspectFit
imageView.image = image
navigationItem.titleView = imageView
In order to get the image view with the proper size and in the center, you should use the following approach:
let width = 120 // choose the image width
let height = 20 // choose the image height
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: 44)) //44 is the standard size of the top bar
let imageView = UIImageView(frame: CGRect(x: (view.bounds.width - width)/2, y: (44 - height)/2, width: width, height: height))
imageView.contentMode = .scaleAspectFit //choose other if it makes sense
imageView.image = UIImage(named: "your_image_name")
titleView.addSubview(imageView)
navigationItem.titleView = titleView