UIBarButtonItem programmatically change color

Question

I have this left UIBarButtonItem that performs like a switch, so I would like to make it gray when its off and the normal tint color when its on but I can't figure out how

Here is the code used to assign the buttons:

    doneHomeworksButton = UIBarButtonItem(image: doneHomeworksButtonImage, style: .plain, target: self, action: #selector(doneHomeworksClicked))
    addButton = UIBarButtonItem(image: plusButtonImage, style: .plain, target: self, action: #selector(plusButtonClicked))

    self.navigationItem.rightBarButtonItem = addButton
    self.navigationItem.leftBarButtonItem = doneHomeworksButton

This is the simulator (I want to change the left button)

Answer 1

This is the way, I use text instead of icon. you can user FM symbols of fontawesome or any other. And also you can change the image when button click

class ViewController: UIViewController{


var btnTick:UIBarButtonItem?


override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = .white
    btnTick  = UIBarButtonItem(title: "2", style: .plain, target: self, action: #selector(didClickedBtn(_ :)))
    btnTick?.tintColor = .blue
    navigationItem.leftBarButtonItem = btnTick
}

@objc func didClickedBtn(_ sender : UIBarButtonItem){
    sender.tintColor = .red
    view.layoutIfNeeded()
}

}