twitter button

        function onbtnYes()

            twitter = require ("twitter")

                                local del = {}
            function del.twitterSuccess(response)
             native.showAlert(_APP_NAME, lang('Tweet has been published!'), {lang('Cool')})
             end
            function del.twitterCancel(response)
            end
            function del.twitterError(response)
             ui.connectionError()
           end

           twitter:tweet(del, defaultField.text .. ' #letsplay #laserflow')