I have a button. I want to create on/off behaviour for this button. If user click first time I want to print off. If click second print off. How to do it?

for example I can add boolean value in my action. But if I have a lot of different actions I need to create new boolean variables. Is there another way?

var pressed = false
let button = UIButton()
button.addTarget(self, action: #selector(self.action), for: .touchUpInside)

@objc func action(sender: UIButton!) {
    if pressed = false { //if button click first
        pressed = true
        print("off")
    } else {//if button click again
        pressed = false
        print("on")
    }
}