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

First set your button type as Custom in interface builder and set the image for normal state for your button.

Connect IBOutlet for button in class file as

@IBOutlet weak var btnCheckbox: UIButton!

in your class file in viewDidLoad set image for selected state as

btnCheckbox.setImage(UIImage.init(named: "name_of_image"), for: .selected)

Create @IBAction for in class file as

@IBAction func onTapCheckBox(_ sender: UIButton) {
    sender.isSelected = !sender.isSelected
}

Then connect @IBAction to your button's Touch up Inside event from interface builder