Bootstrap Carousel Lazy Load

Question

我正在尝试使用bootstrap Carousel延迟加载.看起来这应该是直截了当的,但我在这里甚至没有任何错误来排除故障.JS:

<script type="text/javascript">
    $('#bigCarousel').on("slid", function() {
        // load the next image after the current one slid
        var $nextImage = $('.active.item', this).next('.item').find('img');
        $nextImage.attr('src', $nextImage.data('lazy-load-src'));
    });

</script>

然后是html:

<div id="bigCarousel" class="carousel slide">
  <div class="carousel-inner">
    <div class="active item">
        <img src="assets/bigimage1.jpg" class="img-big">
    </div>
    <div class="item">
        <img data-lazy-load-src="assets/menu-header2.jpg" class="img-big">
    </div>
 </div>
</div>

在firebug中没有JS错误或其他任何我能弄明白的错误,但我的图像只是没有加载.这可能是一件非常简单的事......

Answer 1

最简单的解决方案是:

<div id="carousel" class="carousel slide lazy-load" data-ride="carousel" data-interval="false">
<div class="carousel-inner">
  <div class="item active"><img src="image1.jpg"></div>
  <div class="item"><img data-src="image2.jpg"></div>
  <div class="item"><img data-src="image3.jpg"></div>
</div>
<!-- controls -->
<ol class="carousel-indicators">
    <li data-target="#carousel" data-slide-to="0" class="active"></li>
    <li data-target="#carousel" data-slide-to="1"></li>
    <li data-target="#carousel" data-slide-to="2"></li>
  </ol>
</div>

<script>
$(function() {
    $('.carousel.lazy-load').bind('slide.bs.carousel', function (e) {
        var image = $(e.relatedTarget).find('img[data-src]');
        image.attr('src', image.data('src'));
        image.removeAttr('data-src');
    });
});
</script>

而已!

Answer 2

我认为问题是你的nextImage var中的$.除非你试图提前预装1张幻灯片,否则我也会切换到"幻灯片"事件而不是"滑动"事件.此外,您应该考虑向前滚动和向后滚动.这包括检查从第一张照片到最后一张照片的循环,反之亦然.

$('#myCarousel').on("slide", function(e) {

        //SCROLLING LEFT
        var prevItem = $('.active.item', this).prev('.item');

        //Account for looping to LAST image
        if(!prevItem.length){
            prevItem = $('.active.item', this).siblings(":last");
        }

        //Get image selector
        prevImage = prevItem.find('img');

        //Remove class to not load again - probably unnecessary
        if(prevImage.hasClass('lazy-load')){
            prevImage.removeClass('lazy-load');
            prevImage.attr('src', prevImage.data('lazy-load-src'));
        }

        //SCROLLING RIGHT
        var nextItem = $('.active.item', this).next('.item');

        //Account for looping to FIRST image
        if(!nextItem.length){
            nextItem = $('.active.item', this).siblings(":first");
        }

        //Get image selector
        nextImage = nextItem.find('img');

        //Remove class to not load again - probably unnecessary
        if(nextImage.hasClass('lazy-load')){
            nextImage.removeClass('lazy-load');
            nextImage.attr('src', nextImage.data('lazy-load-src'));
        }

    });

Answer 3

$('#myCarousel').on('slid', function() {
    var $nextImage = $('.active.item', this).next('.item').find('img');
    $nextImage.attr('src', $nextImage.data('data-lazy-load-src'));
});

您正在加载，$nextImage.data('lazy-load-src')但它应该$nextImage.data('data-lazy-load-src')根据脚本编写。