How do you create a UIImage View Programmatically - Swift - ios

Question

I'm trying to create a UIImage View programmatically, I have a new view and I tried doing this
let imageName = "yourImage.png"
yourview.backgroundColor = UIColor.colorWithPatternImage(UIImage(named:imageName))
this did not work because I don't know what this should be yourview in the second line.
Question:
How do I make a UIImageView appear on the screen by coding it instead of doing it in the storyboard

Answer 1

First you create a UIImage from your image file, then create a UIImageView from that:
let imageName = "yourImage.png"
let image = UIImage(named: imageName)
let imageView = UIImageView(image: image!)
Finally you'll need to give imageView a frame and add it your view for it to be visible:
imageView.frame = CGRect(x: 0, y: 0, width: 100, height: 200)
view.addSubview(imageView)

Answer 2

First create UIImageView then add image in UIImageView .
var imageView : UIImageView
imageView = UIImageView(frame:CGRectMake(10, 50, 100, 300));
imageView.image = UIImage(named:"image.jpg")
self.view.addSubview(imageView)

Answer 3

This answer is update to Swift 3.
This is how you can add an image view programmatically where you can control the constraints.
Class ViewController: UIViewController {
let someImageView: UIImageView = {
let theImageView = UIImageView()
theImageView.image = UIImage(named: "yourImage.png")
theImageView.translatesAutoresizingMaskIntoConstraints = false //You need to call this property so the image is added to your view
return theImageView
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(someImageView) //This add it the view controller without constraints
someImageViewConstraints() //This function is outside the viewDidLoad function that controls the constraints
}
// do not forget the `.isActive = true` after every constraint
func someImageViewConstraints() {
someImageView.widthAnchor.constraint(equalToConstant: 180).isActive = true
someImageView.heightAnchor.constraint(equalToConstant: 180).isActive = true
someImageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
someImageView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 28).isActive = true
}
}

Answer 4

You can use above in one line.
let imageView = UIImageView(image: UIImage(named: "yourImage.png")!)

Answer 5

In Swift 3.0 :
var imageView : UIImageView
imageView = UIImageView(frame:CGRect(x:10, y:50, width:100, height:300));
imageView.image = UIImage(named:"Test.jpeg")
self.view.addSubview(imageView)

Answer 6

In Swift 4.2 and Xcode 10.1
//Create image view simply like this.
let imgView = UIImageView()
imgView.frame = CGRect(x: 200, y: 200, width: 200, height: 200)
imgView.image = UIImage(named: "yourimagename")//Assign image to ImageView
imgView.imgViewCorners()
view.addSubview(imgView)//Add image to our view
//Add image view properties like this(This is one of the way to add properties).
extension UIImageView {
//If you want only round corners
func imgViewCorners() {
layer.cornerRadius = 10
layer.borderWidth = 1.0
layer.masksToBounds = true
}
}

Answer 7

Thanks, MEnnabah, just to add to your code where you are missing the = sign in the declaration statement:
let someImageView: UIImageView = {
let theImageView = UIImageView()
theImageView.image = UIImage(named: "yourImage.png")
theImageView.translatesAutoresizingMaskIntoConstraints = false //You need to call this property so the image is added to your view
return theImageView
}()
Everything else is, all perfect for Swift 3.

Answer 8

Make sure to put:
imageView.translatesAutoresizingMaskIntoConstraints = false
Your image view will not show if you don't put that, don't ask me why.

Answer 9

Swift 4:
First create an outlet for your UIImageView
#IBOutlet var infoImage: UIImageView!
Then use the image property in UIImageView
infoImage.image = UIImage(named: "icons8-info-white")