how to make effects on button in ios.On clicking on that button it should expand

Question

I want to apply effects on button.If click on that button,It should increase in size and other should remain in their original size.In the below image if clicked on jardine,it should expands.

Answer 1

Here is the code to animate and transform the button. It is run perfectly as you aspect

func changeButtons(selectedButton:UIButton)
{
    firstBtn.backgroundColor = .white
    firstBtn.setTitleColor(.black, for: .normal)
    animateButton(button: firstBtn, transformBy: .identity)

    secondBtn.backgroundColor = .white
    secondBtn.setTitleColor(.black, for: .normal)
    animateButton(button: secondBtn, transformBy: .identity)

    thirdBtn.backgroundColor = .white
    thirdBtn.setTitleColor(.black, for: .normal)
    animateButton(button: thirdBtn, transformBy: .identity)

    selectedButton.backgroundColor = .black
    selectedButton.setTitleColor(.white, for: .normal)
    animateButton(button: selectedButton, transformBy: CGAffineTransform(scaleX: 1.2, y: 1.2))
}
func animateButton(button : UIButton,transformBy:CGAffineTransform)
{
    UIView.animate(withDuration: 0.2) {
        button.transform = transformBy
        self.view.layoutIfNeeded()
    }
}
@IBAction func btnFirstPress(_ sender: UIButton)
{
    changeButtons(selectedButton: firstBtn)
}
@IBAction func btnSecondPress(_ sender: UIButton)
{
    changeButtons(selectedButton: secondBtn)
}
@IBAction func btnThirdPress(_ sender: UIButton)
{
    changeButtons(selectedButton: thirdBtn)
}