Shows message for given time in upper part of screen above all windows including status bar (swift)

gistfile1.txt

func showMessage(message : String, delay : NSTimeInterval, color : UIColor, completion: boolClosure?)
    {
        dispatch_async(self.GlobalMainQueue)
        {
            guard let window = appDelegate.window else
            {
                completion!(result: false,error: nil)
                return
            }
            
            guard let rootViewController = window.rootViewController else
            {
                completion!(result: false,error: nil)
                return
            }
            
            UIApplication.sharedApplication().delegate?.window!!.windowLevel = UIWindowLevelStatusBar + 1
            let view = UIView(frame: CGRectMake(0, -50, UIScreen.mainScreen().bounds.width, 50))
            view.backgroundColor = color
            view.tag = 8999
            
            let lbl = MLabel(frame: CGRectMake(5, 0, UIScreen.mainScreen().bounds.width - 10, 50))
            lbl.text = message
            lbl.font = UIFont(name: "Open Sans Semibold", size: 12)
            lbl.numberOfLines = 0
            lbl.lineBreakMode = NSLineBreakMode.ByWordWrapping
            lbl.textColor = UIColor.whiteColor()
            lbl.textAlignment = NSTextAlignment.Center
            view.addSubview(lbl)
            
            rootViewController.view.addSubview(view)
            UIView.animateWithDuration(0.4, delay: 0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.5, options: UIViewAnimationOptions.CurveEaseIn, animations: { () -> Void in
                
                var frame = view.frame
                frame.origin.y = 0
                view.frame = frame
                rootViewController.view.layoutSubviews()
            }) { (success) -> Void in
                UIView.animateWithDuration(0.3, delay: delay, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.5, options: UIViewAnimationOptions.CurveEaseIn, animations: { () -> Void in
                    
                    var frame = view.frame
                    frame.origin.y = -50
                    view.frame = frame
                    rootViewController.view.layoutSubviews()

                }) { (success) -> Void in
                    
                    rootViewController.view.viewWithTag(8999)?.removeFromSuperview()
                    UIApplication.sharedApplication().delegate?.window!!.windowLevel = UIWindowLevelNormal
                    
                    if(completion != nil)
                    {
                        completion!(result: true,error: nil)
                        
                    }
                }
            }
        }

    }