Bootstrap Carousel-在不同的范围内显示的项目数 [英] Bootstrap Carousel - Number of Items to Display on Different Resoultions
问题描述
我想使用引导轮播以不同的屏幕分辨率显示不同数量的项目。
I want to use the bootstrap carousel to display a different number of items at different screen resolutions.
例如:
-
我想在屏幕分辨率大于1000px时显示3个联系人的详细信息
I want to show details for a 3 contacts when the screen resolution is greater than 1000px
我想在屏幕分辨率介于600px和999px之间时显示2个联系人的详细信息
I want to show details for a 2 contacts when the screen resolution is between 600px and 999px
最后,我想在屏幕分辨率时显示单个联系人的详细信息小于600px
Finally I want to show details for a single contact when the screen resolution is less than 600px
谢谢您的帮助。我已经坚持了几天。
Thanks for any help in advance. I have been stuck on this for a few days now..
推荐答案
易于实现适用于Bootstrap 4的解决方案。
Easy to implement solution adapted to Bootstrap 4. Will get count of elements from "data-" and breakpoints from JS.
(function ($) {
function calcStepSize(optionNode) {
var breakM = 990;
var breakS = 768;
var width = $(window).innerWidth();
if(width < breakS) {
var key = 's';
} else if(width < breakM) {
key = 'm';
} else {
key = 'l';
}
var cnt = 1*optionNode.data("itemcount-"+key);
return cnt > 0? cnt : 1;
}
function repartition(container, items, count) {
container.children().remove();
for(var i = 0; i < items.length; i++) {
var cBlock = $('<div class="carousel-item" ></div').appendTo(container);
var cInnerBlock = $('<div class="row"></div>').appendTo(cBlock);
for(var j = 0; j < count; j++) {
var cIdx = (i + j) % items.length;
cInnerBlock.append($(items.get(cIdx)).clone());
}
}
container.children().first().addClass("active");
}
$('.carousel.multi').each(function(idx, El) {
var carousel = $(El);
var container = carousel.find('.carousel-inner');
if(!container.children().first().hasClass('carousel-item')) {
var items = container.children().clone();
var lastSize = calcStepSize(carousel);
repartition(container, items, lastSize);
$(window).resize(function () {
var cSize = calcStepSize(carousel);
if(cSize != lastSize) {
repartition(container, items, cSize);
lastSize = cSize;
}
});
} else {
container.children().first().addClass("active");
}
carousel.carousel({
interval: false
});
});
}(jQuery));
<link href="https://v4-alpha.getbootstrap.com/assets/css/docs.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/js/bootstrap.min.js"></script>
<script src="https://cdn.rawgit.com/imsky/holder/master/holder.js"></script>
<div class="container">
<div class="bd-example">
<div id="carousel-example-generic" class="carousel multi slide" data-ride="carousel" data-itemcount-l="4" data-itemcount-m="3" data-itemcount-s="2" autostart="0">
<ol class="carousel-indicators">
<li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
<li data-target="#carousel-example-generic" data-slide-to="1"></li>
<li data-target="#carousel-example-generic" data-slide-to="2"></li>
</ol>
<div class="carousel-inner" role="listbox">
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#ccc:#755" class="img-fluid" alt="First slide">
</div>
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#7dd:#7dd" class="img-fluid" alt="Second slide">
</div>
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#747:#444" class="img-fluid" alt="Third slide">
</div>
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#ccc:#755" class="img-fluid" alt="First slide">
</div>
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#7dd:#7dd" class="img-fluid" alt="Second slide">
</div>
<div class="col-xs-6 col-sm-6 col-md-4 col-lg-3">
<img src="holder.js/250x250/auto/#747:#444" class="img-fluid" alt="Third slide">
</div>
</div>
<a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
<span class="icon-prev" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
<span class="icon-next" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
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