static func showEverywhere(_ alert: UIAlertController) {
    if !exist() {
        let alertWindow = UIWindow(frame: UIScreen.main.bounds)
        alertWindow.rootViewController = UIViewController()
        alertWindow.windowLevel = UIWindowLevelAlert + 1;
        alertWindow.makeKeyAndVisible()
        alertWindow.rootViewController?.present(alert, animated: true, completion: nil)
    }
}

static func exist() -> Bool {
    if let _ = UIApplication.shared.keyWindow?.rootViewController?.presentedViewController as? UIAlertController {
        return true
    }

    return false
}