Add toolbar in keyboard

toolbar.swift

    class func setUpToolBar(txtField:UITextField, vista:UIViewController){
        
        let btn1:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
        let btn2:UIBarButtonItem = UIBarButtonItem(title: "Listo", style: UIBarButtonItemStyle.Done, target: nil, action: "hideKeyboard")
        btn2.tintColor = UIColor.blackColor()
        
        let items:NSArray = [btn1,btn2]
        let toolBar: UIToolbar = UIToolbar(frame: CGRectMake(0,0,vista.view.frame.size.width,40))
        toolBar.barStyle = UIBarStyle.Default
        toolBar.barTintColor = UIColor.lightTextColor()
        toolBar.setItems(items as? [UIBarButtonItem], animated: true)
        
        txtField.inputAccessoryView = toolBar
        
        
    }