How to set different font size for UIButton when it is pressed

Question

prandrei OP

Created Feb ’22

Replies 1

Boosts 1

Views 4.8k

Participants 2

I am trying to change font size of button itself after it was pressed.

class ViewController: UIViewController {
   @IBOutlet weak var buttonToResize: UIButton!

   @IBAction func buttonTapped(_ sender: UIButton) {
        buttonToResize.titleLabel!.font = UIFont(name: "Helvetica", size: 40)
// Also tried buttonToResize.titleLabel?.font = UIFont .systemFont(ofSize: 4)
}

However the changes are not applied. What is interesting, to me, that if I try to resize some other button (second one) after pressing on initial (first one), it works as expected.

Like this:

class ViewController: UIViewController {
    @IBOutlet weak var buttonToResize: UIButton!
    @IBOutlet weak var secondButtonToResize: UIButton!

    @IBAction func buttonTapped(_ sender: UIButton) {
        secondButtonToResize.titleLabel!.font = UIFont(name: "Helvetica", size: 40)
}

Other properties like backgroundColor seems to apply, however with font size I face problem.

Answered by Claude31 in 703679022

What is the button style ? It doesn't work with custom buttons.

With custom buttons, you need to use AttributedTitle:

        if let attrFont = UIFont(name: "Helvetica", size: 40) {
            let title = buttonToResize.titleLabel!.text!
            let attrTitle = NSAttributedString(string: title, attributes: [NSAttributedString.Key.font: attrFont])
            buttonToResize.setAttributedTitle(attrTitle, for: UIControl.State.normal)
        }

Note that this work also for non custom (system) button.

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Answer 1

Claude31 OP

Feb ’22

Accepted Answer

What is the button style ? It doesn't work with custom buttons.

With custom buttons, you need to use AttributedTitle:

        if let attrFont = UIFont(name: "Helvetica", size: 40) {
            let title = buttonToResize.titleLabel!.text!
            let attrTitle = NSAttributedString(string: title, attributes: [NSAttributedString.Key.font: attrFont])
            buttonToResize.setAttributedTitle(attrTitle, for: UIControl.State.normal)
        }

Note that this work also for non custom (system) button.

2