是否可以突出显示Flexslider轮播中的当前项目,因此我可以为活动的类添加一个类？

我使用Flexslider轮播的基本设置.现在我想有一个脚本,它将在视口内可见的每个幻灯片中添加活动状态.

这个例子我使用：
http://flexslider.woothemes.com/basic-carousel.html

我现在如何在start函数中获取Flexslider属性.当我给函数我可以要求的参数 – ul中的项目总数,它将移动多少项,以及将有多少页面调度.我不知道是否有可能编写一个formule来计算哪一个对于给定的变量是活跃的,所以我可以突出显示它们.

$('.flexslider').flexslider({
        animation: "slide",
        animationLoop: false,
        slideshow: false,
        itemWidth: 460,
        itemMargin: 30,
        minItems: 2,
        maxItems: 6,
        controlNav: false,
        customDirectionNav: ".custom-direction li a",
        start: function(slider) {
            var pagingCount = slider.pagingCount;
            var move = slider.move;
            var visibleSlides = slider.visible;
            var totalSlides = slider.count;

            console.log(slider);
            console.log(slider.move);
            console.log(slider.update);


            if (totalSlides) {
                $('.slides li').addClass('active-slides');

            };
            // console.log(slider.count);
            // console.log(slider.currentSlide);
        }

    });

我已经开始了,但不知道if语句或for循环应该如何完成.

有任何想法吗？
提前致谢.

最佳答案 使用事件开始和’之后’来处理这个问题.见下面的例子.

$('.flexslider').flexslider({
    animation: "slide",
    animationLoop: false,
    slideshow: false,
    itemWidth: 460,
    itemMargin: 30,
    minItems: 2,
    maxItems: 6,
    controlNav: false,
    customDirectionNav: ".custom-direction li a",
    start: function (slider) {
        window.addCurrentSlidesClass(slider);
    },
    after: function (slider) {
        window.addCurrentSlidesClass(slider);
    }
});

window.addCurrentSlidesClass = function (slider) {
    //debugger;
    $('.flexslider li').removeClass("active-slides");
    var startli = (slider.move * (slider.currentSlide));
    var endli = (slider.move * (slider.currentSlide + 1));
    for (i = startli + 1; i <= endli; i++) {
        $('.flexslider li:nth-child(' + i + ')').addClass('active-slides');
    }
}

<div class="flexslider carousel">
    <div class="flex-viewport" style="overflow: hidden; position: relative;">
        <ul class="slides" style="width: 2400%; transition-duration: 0.6s; transform: translate3d(0px, 0px, 0px);">
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_cheesecake_brownie.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_lemon.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_donut.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_caramel.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_cheesecake_brownie.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_lemon.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_donut.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_caramel.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_cheesecake_brownie.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_lemon.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_donut.jpg" draggable="false">
            </li>
            <li style="width: 210px; float: left; display: block;">
                <img src="images/kitchen_adventurer_caramel.jpg" draggable="false">
            </li>
        </ul>
    </div>
    <ol class="flex-control-nav flex-control-paging">
        <li><a class="flex-active">1</a>

        </li>
        <li><a class="">2</a>

        </li>
        <li><a class="">3</a>

        </li>
    </ol>
    <ul class="flex-direction-nav">
        <li class="flex-nav-prev"><a class="flex-prev flex-disabled" href="#" tabindex="-1">Previous</a>

        </li>
        <li class="flex-nav-next"><a class="flex-next" href="#" tabindex="-1">Next</a>

        </li>
    </ul>
    <div class="flex-pauseplay"><a class="flex-pause">Pause</a>

    </div>
</div>

DEMO