How to resize an image inside an UIButton programmatically?

Question

I have this UIButton and an image to fit in. I don't want that the image take all the space inside the button but just a little part of it right in the center, but if I resize the button it will resize the image too. How can I do that, is there an option to set whatever dimension I want independently from the size of the UIButton? Thanks!

Answer 1

This can be done through code in the following way:

    let imageSize:CGSize = CGSize(width: 20, height: 20)

    let button:UIButton = UIButton(type: UIButton.ButtonType.custom)
    button.frame = CGRect(x: 200, y: 200, width: 60, height: 60)
    button.backgroundColor = UIColor.yellow
    button.setImage(UIImage(named: "chat.png"), for: UIControl.State.normal)

    // The below line will give you what you want
    button.imageEdgeInsets = UIEdgeInsets(
        top: (button.frame.size.height - imageSize.height) / 2,
        left: (button.frame.size.width - imageSize.width) / 2,
        bottom: (button.frame.size.height - imageSize.height) / 2,
        right: (button.frame.size.width - imageSize.width) / 2)

    self.view.addSubview(button)

This way, you can achieve what you wanted.