javascript - 在没有 for 循环的情况下调整大小时(使用 jquery)在单个元素中 Bootstrap 轮播多个图像

Question

我有一个 Bootstrap 轮播，当我根据轮播内部宽度调整页面大小时，我需要在单个元素中制作多个图像(没有 for 循环)。旋转木马内部宽度是在我调整页面大小时动态生成的。

实际代码:

<div class="carousel-inner" role="listbox">


    <div class="item active">
      <img src="img_flower1.jpg" alt="Chania">page 1
    </div>

    <div class="item">
      <img src="img_flower2.jpg" alt="Flower">page 2
    </div>

    <div class="item">
      <img src="img_flower3.jpg" alt="Flower">page 3 
    </div>

    <div class="item">
      <img src="img_flower4.jpg" alt="Flower">page 4 
    </div>
  </div>

预期代码:

    <div class="item active">
      <img src="img_flower1.jpg" alt="Chania">page 1
       <img src="img_flower2.jpg" alt="Flower">page 2
    </div>

    <div class="item">
     <img src="img_flower3.jpg" alt="Flower">page 3 
      <img src="img_flower4.jpg" alt="Flower">page 4 
    </div>

  </div>

Answer 1

首先，您需要像这样为轮播元素添加响应能力。

<div class="item">
  <div class="col-md-2 col-sm-6 col-xs-12">
     <a href="#">
       <img src="http://placehold.it/500/fcfcfc/333&amp;text=demo" class="img-responsive">
    </a>
   </div>
</div>

以便根据新的布局变化、中小型屏幕进行调整。

另一种选择是将另一个库用于轮播。我建议看看 slick .它拥有您需要的所有东西。

对于您的场景设置，就这么简单。

$('.responsive').slick({
  dots: true,
  infinite: false,
  speed: 300,
  slidesToShow: 4,
  slidesToScroll: 4,
  responsive: [
    {
      breakpoint: 1024,
      settings: {
        slidesToShow: 3,
        slidesToScroll: 3,
        infinite: true,
        dots: true
      }
    },
    {
      breakpoint: 600,
      settings: {
        slidesToShow: 2,
        slidesToScroll: 2
      }
    },
    {
      breakpoint: 480,
      settings: {
        slidesToShow: 1,
        slidesToScroll: 1
      }
    }
    // You can unslick at a given breakpoint now by adding:
    // settings: "unslick"
    // instead of a settings object
  ]
});

如果你想使用bootstrap轮播。这是一些要测试的示例代码。尝试在全尺寸窗口中打开，然后调整屏幕大小。

$('.carousel[data-type="multi"] .item').each(function(){
  var next = $(this).next();
  if (!next.length) {
    next = $(this).siblings(':first');
  }
  next.children(':first-child').clone().appendTo($(this));
  
  for (var i=0;i<4;i++) {
    next=next.next();
    if (!next.length) {
    	next = $(this).siblings(':first');
  	}
    
    next.children(':first-child').clone().appendTo($(this));
  }
});

.carousel-control 			 { width:  4%; }
.carousel-control.left,.carousel-control.right {margin-left:15px;background-image:none;}
@media (max-width: 767px) {
	.carousel-inner .active.left { left: -100%; }
	.carousel-inner .next        { left:  100%; }
	.carousel-inner .prev		 { left: -100%; }
	.active > div { display:none; }
	.active > div:first-child { display:block; }

}
@media (min-width: 767px) and (max-width: 992px ) {
	.carousel-inner .active.left { left: -50%; }
	.carousel-inner .next        { left:  50%; }
	.carousel-inner .prev		 { left: -50%; }
	.active > div { display:none; }
	.active > div:first-child { display:block; }
	.active > div:first-child + div { display:block; }
}
@media (min-width: 992px ) {
	.carousel-inner .active.left { left: -16.7%; }
	.carousel-inner .next        { left:  16.7%; }
	.carousel-inner .prev		 { left: -16.7%; }	
}

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="col-md-12 text-center"><h3>Testing Carousel</h3></div>
<div class="col-md-10 col-md-offset-1">
<div class="carousel slide" data-ride="carousel" data-type="multi" data-interval="3000" id="myCarousel">
  <div class="carousel-inner">
    <div class="item active">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/e499e4/fff&amp;text=1" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/e477e4/fff&amp;text=2" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/eeeeee&amp;text=3" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/f4f4f4&amp;text=4" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/f566f5/333&amp;text=5" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/f477f4/fff&amp;text=6" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/eeeeee&amp;text=7" class="img-responsive"></a></div>
    </div>
    <div class="item">
      <div class="col-md-2 col-sm-6 col-xs-12"><a href="#"><img src="http://placehold.it/500/fcfcfc/333&amp;text=8" class="img-responsive"></a></div>
    </div>
  </div>
  <a class="left carousel-control" href="#myCarousel" data-slide="prev"><i class="glyphicon glyphicon-chevron-left"></i></a>
  <a class="right carousel-control" href="#myCarousel" data-slide="next"><i class="glyphicon glyphicon-chevron-right"></i></a>
</div>
</div>