如何在Flexslider旋转显示中突出显示活动幻灯片

Question

是否可以突出显示Flexslider carousel中的当前项，以便我可以向活动项添加类?

我使用Flexslider旋转木马的基本设置。现在我想有一个脚本，将添加活动到每个幻灯片内的viewport可见。

我用这个例子:http://flexslider.woothemes.com/basic-carousel.html

我现在如何在开始函数中获得Flexslider属性。当我给这个函数提供我可以请求的参数时——列表中项目的总数，它将移动多少个项目，以及将进行多少分页。我不知道是否可以编写一个公式来计算给定变量下哪一个是活动的，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);
        }
    });

我已经做了一个开始，但不知道if语句或for循环应该是什么样子来完成这个。

任何想法?

Answer 1

使用事件start和'after'来处理此问题。请看下面的例子。

$('.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>

Answer 2

使用了上面公认的答案，但需要做一些修改以使其适合我，如下所示。

主要是处理一些异常，处理半显示的幻灯片和当移动/可见是不同的。

window.addCurrentSlidesClass = function (slider) {
  jQuery('.flexslider li').removeClass("active-slide");
  // get visible by math rather than slider variable due to half shown slides not counting
  // var visible = slider.visible;
  var visible = Math.ceil(slider.w / slider.itemT);
  var startli = (slider.move * (slider.currentSlide));
  // var endli = (slider.move * (slider.currentSlide + 1));
  var endli = startli + visible;
  // Don't push past when you reach end of list
  if(endli > slider.count) {
    startli = startli - (endli - slider.count);
    endli = endli - (endli - slider.count);
  }
  for (i = startli + 1; i <= endli; i++) {
    jQuery('.flexslider li:nth-child(' + i + ')').addClass('active-slide');
  }
};