lockscroll dont work at IOS

[zdimaz]

        Dont work any more.......

        callbacks: {
            elementParse: function(item) {
                if(item.el.hasClass("popup_youtube")){
                    item.type = 'iframe';
                }else {
                    item.type = 'image';
                }
            },
            beforeOpen: function () {
                $(window).lockscroll(true);
            },
            open: function () {
                $(window).lockscroll(true);
            },
            close: function () {
                $(window).lockscroll(false);
            }
        },