How to change button image in swift?

Question

I am working on an app which has a button. The button has no text, image or background.

So what I want to do is to give it an image in the viewDidLoad function.

Answer 1

now (swift 3 edition):

@IBOutlet var tapButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    tapButton.setImage(UIImage(named: "redTap")?.withRenderingMode(.alwaysOriginal), for: .normal)
    tapButton.setImage(UIImage(named: "redTap")?.withRenderingMode(.alwaysOriginal), for: .normal)
}