iOS: adding buttons to Toolbar programmatically - swift

Question

I need to create Toolbar and add buttons programmatically. I will have different sets of buttons for diferent screens.
That's easy.
Also, I need to center those buttons. They should have equal space between them.
And also I need that all those buttons separate screen width only between themselfs. Like, I have 5 buttons, total screen width is 300, so each button will have width 60. I am not sure how to do that, i tried dirrenrt things but they wasn't centered or hadn't such width. Any ideas how to do that?
class OptionsView: UIView {
#IBOutlet weak var toolbar: UIToolbar!
var width: CGFloat {
return 0//UIScreen.main.bounds.width/5 //was trying to calculate width , but it did not work
}
override func awakeFromNib() {
super.awakeFromNib()
toolbar.isTranslucent = true
toolbar.setBackgroundImage(UIImage(), forToolbarPosition: UIBarPosition.any, barMetrics: UIBarMetrics.default)
toolbar.setShadowImage(UIImage(), forToolbarPosition: UIBarPosition.any)
toolbar.barTintColor = .white
backgroundColor = .clear
}
func addAirPlay(target: Any?, action: Selector) {
let normalImage = UIImage(named: "player-airplay")
let button = UIButton(type: .custom)
button.frame = CGRect(x: 0, y: 0, width: width, height: 100)
button.setImage(normalImage, for: UIControlState())
button.addTarget(target, action: action, for: .touchUpInside)
let item = UIBarButtonItem(customView: button)
//item.width = width //was trying to play with that
var items = toolbar.items
items?.append(item)
toolbar.items = items
toolbar.reload()
}
func addOrientation(target: Any?, action: Selector) {
let button = UIButton(type: .custom)
button.tag = orientationTag
button.frame = CGRect(x: 0, y: 0, width: width, height: 100)
button.addTarget(target, action: action, for: .touchUpInside)
let item = UIBarButtonItem(customView: button)
//item.width = width
var items = toolbar.items
items?.append(item)
toolbar.items = items
toolbar.reload()
reloadOrientation()
}
func addFlexibleSpace() {
let item = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
var items = toolbar.items
items?.append(item)
toolbar.items = items
toolbar.reload()
}
Creating:
optionsView = OptionsView.loadFromNib()
playerView.addSubview(optionsView)
optionsView.snp.makeConstraints { (make) in
make.leading.trailing.top.bottom.equalTo(self.optionsPlaceholderView)
}
// optionsView.addFlexibleSpace() //was trying that as well
optionsView.addAirPlay(target: self, action: #selector(airplayButtonAction(_:)))
optionsView.addFlexibleSpace()
optionsView.addOrientation(target: self, action: #selector(orientationButtonAction(_:)))
optionsView.addFlexibleSpace()
optionsView.addFave(target: self, action: #selector(faveButtonAction(_:)))
optionsView.addFlexibleSpace()
optionsView.addExtra(target: self, action: #selector(showExtraButtonAction(_:)))
optionsView.addFlexibleSpace()
optionsView.addScenes(target: self, action: #selector(sceneButtonAction(_:)))
// optionsView.addFlexibleSpace()