Set frame CGReact x position in middle like centerXAnchor NSLayoutConstraint programmatically - ios

I am creating a simple app which set image as circle by calculate with frame of image.
Here is I declare image variable:
lazy var imageUserDetailProfileView: UIImageView = {
let imageView = UIImageView()
imageView.contentMode = .scaleAspectFill
imageView.layer.borderWidth = 1
imageView.image = UIImage(named: "profile-icon")
imageView.layer.borderColor = UIColor(red:0.00, green:0.50, blue:0.00, alpha:1.0).cgColor
imageView.clipsToBounds = true
return imageView
}()
Here is i made that frame width and height of image became circle
imageUserDetailProfileView.frame = CGRect(x: view.frame.midX, y: 20,width: 100, height: 100)
imageUserDetailProfileView.layer.cornerRadius = imageUserDetailProfileView.frame.height/2
Now i want image should stay in middle of screen like using NSLayoutConstraint which has method centerXAnchor.
How to solve this problem?


let midX = view.frame.size.width / 2
let midY = view.frame.size.height / 2


Try This Code.
Custom Method For Image Set In Center Of Any View. Just Call Method And Pass Image & View. Customize according to Use. Swift 4
func setImageInCenterOfView(image:UIImage,view:UIView) {
let imageWidth:CGFloat = 100
let myImageView = UIImageView.init(frame: CGRect.init(x: (view.frame.size.width/2)-imageWidth/2, y: (view.frame.size.height/2)-imageWidth/2, width: imageWidth, height: imageWidth))
myImageView.clipsToBounds = true
myImageView.layer.cornerRadius = myImageView.frame.size.height/2
myImageView.image = image
view.addSubview(myImageView)
view.layoutIfNeeded()
}

Related

Can I resize just the image of an imageView?

So I have this code:
override func viewDidLoad() {
super.viewDidLoad()
let imageView = UIImageView()
view.addSubview(imageView)
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.layer.borderWidth = 5
imageView.layer.borderColor = UIColor.green.cgColor
NSLayoutConstraint.activate([
imageView.heightAnchor.constraint(equalToConstant: 200),
imageView.widthAnchor.constraint(equalToConstant: 200),
imageView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 0),
imageView.centerXAnchor.constraint(equalTo: view.centerXAnchor, constant: 0),
])
let image = UIImage(named: "3")
//let image = UIImage(named: "3")?.resizeImageWith(newSize: CGSize(width: 5,height: 5))
imageView.image = image
}
That looks like this:
Im trying to resize just the image ( so like from the green border there is a margin) with this extension:
func resizeImageWith(newSize: CGSize) -> UIImage {
let horizontalRatio = newSize.width / size.width
let verticalRatio = newSize.height / size.height
let ratio = min(horizontalRatio, verticalRatio)
let newSize = CGSize(width: size.width * ratio, height: size.height * ratio)
UIGraphicsBeginImageContextWithOptions(newSize, false, 0)
draw(in: CGRect(origin: CGPoint(x: 0, y: 0), size: newSize))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage!
}
But when I use that like this:
let image = UIImage(named: "3")?.resizeImageWith(newSize: CGSize(width: 60,height: 60))
I get the following result:
And same with this:
let image = UIImage(named: "3")?.resizeImageWith(newSize: CGSize(width: 5,height: 5))
The image just get worst.
Is it possible to just resize the image in order to have a margin from the imageView? Thank you!

Change the image view content mode to Center:
imageView.contentMode = .center

I was able to produce what you wanted, but doing away with constraints. Using a container view that holds the imageView as a subview, you can use the container like a frame and set its border width and color.
With the frame in place, you can then resize the image as per your needs by just setting the frame of the imageView. The last 2 lines of the code are commented out, but if you uncomment them, you will see that the image will shrink to fit the new imageView frame size set to (50, 50).
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let containerView = UIView()
containerView.layer.borderWidth = 5
containerView.layer.borderColor = UIColor.green.cgColor
containerView.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
containerView.center = view.center
let imageView = UIImageView()
view.addSubview(containerView)
containerView.addSubview(imageView)
let image = UIImage(named: "3")!
imageView.frame = CGRect(origin: imageView.frame.origin, size: CGSize(width: 200, height: 200))
imageView.image = image
imageView.contentMode = .scaleAspectFit
imageView.center = view.convert(containerView.center, to: containerView)
print("Image Width: \(image.size.width)")
print("Image Height: \(image.size.height)")
print("ImageView Width: \(imageView.frame.width)")
print("ImageView Height: \(imageView.frame.height)")
print("Container Width: \(containerView.frame.width)")
print("Container Height: \(containerView.frame.height)")
print("View Center: \(view.center.x),\(view.center.y)")
print("Container Center: \(containerView.center.x),\(containerView.center.y)")
//imageView.frame.size = CGSize(width: 50, height: 50)
//imageView.center = view.convert(containerView.center, to: containerView)
}
}
I used .scaleAspectFit so that the image will be forced to fit whatever size you set the imageView to, while maintaining its original aspect ratio. You can of course change this to suit your needs as well. If you need to set the size of your image in different ways, you'll need to change the imageView's contentMode property as appropriate. More info here:
https://developer.apple.com/documentation/uikit/uiimageview
The convert function just helps to layout the imageView where you want it, within its parent view.
The print debug statements are helpful for checking your layout, but of course, unnecessary.

Centre image in navigation bar

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

Bar Button Item in header moves logo across in Swift 3

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

How do I make the border x distance away from image?

I want a border around my image, but I want the border to be a certain distance from the actual image. Right now it creates a border right around the image. How would I do this?
let image = UIImage(named: "WhitePeeyr")!
let imageView = UIImageView(image: image)
let padding = CGFloat(20)
let frame = CGRectMake(0, 0, 100 + 2*padding, 40 + 2*padding)
imageView.frame = CGRectInset(frame, padding, padding)
imageView.frame.origin.y = view.frame.size.height - 542
imageView.frame.origin.x = (self.view.bounds.size.width - imageView.frame.size.width) / 2.0
view.addSubview(imageView)
let borderView = UIView(frame: frame)
borderView.layer.borderWidth = 2.0
borderView.layer.borderColor = UIColor.whiteColor().CGColor
borderView.clipsToBounds = true
view.addSubview(borderView)

You will need two separate views (or layers):
let image = UIImage(named: "image")!
let padding = CGFloat(20)
let frame = CGRectMake(0, 0, image.size.width + 2*padding, image.size.height + 2*padding)
let borderView = UIView(frame: frame)
borderView.layer.borderWidth = 2.0
borderView.layer.borderColor = UIColor.whiteColor().CGColor
borderView.clipsToBounds = true
view.addSubview(borderView)
let imageView = UIImageView(image: image)
imageView.frame = CGRectInset(frame, padding, padding)
view.addSubview(imageView)

Navigation bar with UIImage for title

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

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