         }
     }
     
+    //action au clic du bouton du menu
     @IBAction func showMenu(sender: AnyObject) {
         rotateMenuButton(menuExpanded)
         if menuExpanded == false{ showButtons() }

            }, completion: nil)
    }
    
    func hideButtons(){
        UIView.animateWithDuration(0.2, delay: 0, options: [.CurveEaseOut],animations: {
            self.findMeButton.center.x += 90

        }
    }
    
    // fonction qui permet d'afficher les options du menu
    func showButtons(){
        UIView.animateWithDuration(0.2, delay: 0, options: [.CurveEaseOut],animations: {
            self.findMeButton.center.x -= 90
