In iOS, how do I create a button that is always on top of all other view controllers?

Question

No matter if modals are presented or the user performs any type of segue.

Is there a way to keep the button \"always on top\" (not the top of the screen) throughout

Answer 1

Present it on this:

public static var topMostVC: UIViewController? {
    var presentedVC = UIApplication.sharedApplication().keyWindow?.rootViewController
    while let pVC = presentedVC?.presentedViewController {
        presentedVC = pVC
    }

    if presentedVC == nil {
        print("EZSwiftExtensions Error: You don't have any views set. You may be calling them in viewDidLoad. Try viewDidAppear instead.")
    }
    return presentedVC
}

topMostVC?.presentViewController(myAlertController, animated: true, completion: nil)

//or

let myView = UIView()
topMostVC?.view?.addSubview(myView)

These are included as a standard function in a project of mine: https://github.com/goktugyil/EZSwiftExtensions