将这个修改后的bootstrap 4轮播加倍，只能正常运行一半(滚动循环停止工作) [英] Doubling up this modified bootstrap 4 carousel only functions half correctly (scroll loop stops working)
本文介绍了将这个修改后的bootstrap 4轮播加倍，只能正常运行一半(滚动循环停止工作)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
因此，我在此处找到了一个很棒的轮播修改.但是，当我尝试将两个放在单个页面上时，滚动将按预期停止工作.我已经让他们对适当的轮播进行操作，但是当轮播结束时，它将不再正确地循环播放.它基本上循环为空，然后重新填充它们.但是我试图弄清楚如何使它们从1到8流畅地循环，然后无缝地回到1.
So I found this great carousel modification Here. When I try to put two on a single page however, the scroll stops working as intended. I've gotten them to act on the proper Carousel, BUT when it gets to the end, it no longer loops properly. It basically loops to empty then repopulates them all again. But I am trying to figure out how to get them to fluidly loop from 1 to 8 and back to 1 seamlessly.
注意:仅当不在单项视图(移动视图)中时，它才无法正常工作.寻找固定的功能，当3个项目以col-md尺寸显示时.如果您运行代码，请在全屏模式下进行测试，以查看我在说什么.
Note: It only functions improperly when not in the single item view (mobile view). Looking to fix how it functions when 3 items are shown at col-md size. If you run code, test in full screen mode to see what i'm talking about).
// JavaScript Document
$('#carouselExample').on('slide.bs.carousel', function (e) {
var $e = $(e.relatedTarget);
var idx = $e.index();
var itemsPerSlide = 3;
var totalItems = $('.carousel-item').length;
if (idx >= totalItems-(itemsPerSlide-1)) {
var it = itemsPerSlide - (totalItems - idx);
for (var i=0; i<it; i++) {
// append slides to end
if (e.direction=="left") {
$('.carousel-item').eq(i).appendTo('.carousel-inner');
}
else {
$('.carousel-item').eq(0).appendTo('.carousel-inner');
}
}
}
});
@media (min-width: 768px) {
/* show 3 items */
.carousel-inner .active,
.carousel-inner .active + .carousel-item,
.carousel-inner .active + .carousel-item + .carousel-item {
display: block;
}
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left),
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left) + .carousel-item,
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left) + .carousel-item + .carousel-item {
transition: none;
}
.carousel-inner .carousel-item-next,
.carousel-inner .carousel-item-prev {
position: relative;
transform: translate3d(0, 0, 0);
}
.carousel-inner .active.carousel-item + .carousel-item + .carousel-item + .carousel-item {
position: absolute;
top: 0;
right: -33.3333%;
z-index: -1;
display: block;
visibility: visible;
}
/* left or forward direction */
.active.carousel-item-left + .carousel-item-next.carousel-item-left,
.carousel-item-next.carousel-item-left + .carousel-item,
.carousel-item-next.carousel-item-left + .carousel-item + .carousel-item,
.carousel-item-next.carousel-item-left + .carousel-item + .carousel-item + .carousel-item {
position: relative;
transform: translate3d(-100%, 0, 0);
visibility: visible;
}
/* farthest right hidden item must be abso position for animations */
.carousel-inner .carousel-item-prev.carousel-item-right {
position: absolute;
top: 0;
left: 0;
z-index: -1;
display: block;
visibility: visible;
}
/* right or prev direction */
.active.carousel-item-right + .carousel-item-prev.carousel-item-right,
.carousel-item-prev.carousel-item-right + .carousel-item,
.carousel-item-prev.carousel-item-right + .carousel-item + .carousel-item,
.carousel-item-prev.carousel-item-right + .carousel-item + .carousel-item + .carousel-item {
position: relative;
transform: translate3d(100%, 0, 0);
visibility: visible;
display: block;
visibility: visible;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Untitled Document</title>
<!-- Font CDN -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Bootstrap -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<!-- MY CSS FILE-->
</head>
<body>
<div class="container">
<div id="carouselExample" class="carousel slide" data-ride="carousel" data-interval="9000">
<div class="carousel-inner row w-100 mx-auto" role="listbox">
<div class="carousel-item col-md-4 active">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400/000/fff?text=1" alt="slide 1">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=2" alt="slide 2">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=3" alt="slide 3">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=4" alt="slide 4">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=5" alt="slide 5">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=6" alt="slide 6">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=7" alt="slide 7">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=8" alt="slide 7">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExample" role="button" data-slide="prev">
<i class="fa fa-chevron-left fa-lg text-muted"></i>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next text-faded" href="#carouselExample" role="button" data-slide="next">
<i class="fa fa-chevron-right fa-lg text-muted"></i>
<span class="sr-only">Next</span>
</a>
</div>
</div> <!-- episodes carsoel div -->
<!------------------- START OF TOP RECENT CLIPS CAROUSELS CONTENT ----------------------------------->
<div class="container">
<div id="test" class="carousel slide" data-ride="carousel" data-interval="9000">
<div class="carousel-inner row w-100 mx-auto" role="listbox">
<div class="carousel-item col-md-4 active">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400/000/fff?text=1" alt="slide 1">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=2" alt="slide 2">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=3" alt="slide 3">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=4" alt="slide 4">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=5" alt="slide 5">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=6" alt="slide 6">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=7" alt="slide 7">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=8" alt="slide 7">
</div>
</div>
<a class="carousel-control-prev" href="#test" role="button" data-slide="prev">
<i class="fa fa-chevron-left fa-lg text-muted"></i>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next text-faded" href="#test" role="button" data-slide="next">
<i class="fa fa-chevron-right fa-lg text-muted"></i>
<span class="sr-only">Next</span>
</a>
</div>
</div> <!-- clips carsoel div -->
<script
src="https://code.jquery.com/jquery-3.3.1.min.js"
integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="../js/my_js_main.js" crossorigin="anonymous"></script>
</body>
</html>
推荐答案
如果您希望它在同一页面中的多个轮播实例上运行，则只需将代码应用于该轮播实例.为此，您需要将当前轮播保存到变量中(在下面的示例中为$c):
If you want it to work on multiple carousel instances in the same page, you need to only apply your code to that instance of carousel. For that purpose, you need to save current carousel in a variable ($c in the example below):
$c = $e.closest('.carousel-inner'),
并使用它将jQuery选择器限制为仅当前轮播，将$(selector)替换为$(selector, $c):
and use it to limit the jQuery selectors to current carousel only, replacing $(selector) with $(selector, $c):
// JavaScript Document
$('#carouselExample').on('slide.bs.carousel', modCarousel);
$('#test').on('slide.bs.carousel', modCarousel);
function modCarousel (e) {
var $e = $(e.relatedTarget),
idx = $e.index(),
itemsPerSlide = 3,
$c = $e.closest('.carousel-inner'),
totalItems = $('.carousel-item', $c).length;
if (idx >= totalItems-(itemsPerSlide-1)) {
var it = itemsPerSlide - (totalItems - idx);
for (var i=0; i<it; i++) {
// append slides to end
if (e.direction=="left") {
$('.carousel-item', $c).eq(i).appendTo($c);
}
else {
$('.carousel-item', $c).eq(0).appendTo($c);
}
}
}
};
@media (min-width: 768px) {
/* show 3 items */
.carousel-inner .active,
.carousel-inner .active+.carousel-item,
.carousel-inner .active+.carousel-item+.carousel-item {
display: block;
}
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left),
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left)+.carousel-item,
.carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left)+.carousel-item+.carousel-item {
transition: none;
}
.carousel-inner .carousel-item-next,
.carousel-inner .carousel-item-prev {
position: relative;
transform: translate3d(0, 0, 0);
}
.carousel-inner .active.carousel-item+.carousel-item+.carousel-item+.carousel-item {
position: absolute;
top: 0;
right: -33.3333%;
z-index: -1;
display: block;
visibility: visible;
}
/* left or forward direction */
.active.carousel-item-left+.carousel-item-next.carousel-item-left,
.carousel-item-next.carousel-item-left+.carousel-item,
.carousel-item-next.carousel-item-left+.carousel-item+.carousel-item,
.carousel-item-next.carousel-item-left+.carousel-item+.carousel-item+.carousel-item {
position: relative;
transform: translate3d(-100%, 0, 0);
visibility: visible;
}
/* farthest right hidden item must be abso position for animations */
.carousel-inner .carousel-item-prev.carousel-item-right {
position: absolute;
top: 0;
left: 0;
z-index: -1;
display: block;
visibility: visible;
}
/* right or prev direction */
.active.carousel-item-right+.carousel-item-prev.carousel-item-right,
.carousel-item-prev.carousel-item-right+.carousel-item,
.carousel-item-prev.carousel-item-right+.carousel-item+.carousel-item,
.carousel-item-prev.carousel-item-right+.carousel-item+.carousel-item+.carousel-item {
position: relative;
transform: translate3d(100%, 0, 0);
visibility: visible;
display: block;
visibility: visible;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Untitled Document</title>
<!-- Font CDN -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Bootstrap -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<!-- MY CSS FILE-->
</head>
<body>
<div class="container">
<div id="carouselExample" class="carousel slide" data-ride="carousel" data-interval="1850">
<div class="carousel-inner row w-100 mx-auto" role="listbox">
<div class="carousel-item col-md-4 active">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400/000/fff?text=1" alt="slide 1">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=2" alt="slide 2">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=3" alt="slide 3">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=4" alt="slide 4">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=5" alt="slide 5">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=6" alt="slide 6">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=7" alt="slide 7">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=8" alt="slide 7">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExample" role="button" data-slide="prev">
<i class="fa fa-chevron-left fa-lg text-muted"></i>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next text-faded" href="#carouselExample" role="button" data-slide="next">
<i class="fa fa-chevron-right fa-lg text-muted"></i>
<span class="sr-only">Next</span>
</a>
</div>
<div id="test" class="carousel slide" data-ride="carousel" data-interval="2100">
<div class="carousel-inner row w-100 mx-auto" role="listbox">
<div class="carousel-item col-md-4 active">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400/000/fff?text=1" alt="slide 1">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=2" alt="slide 2">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=3" alt="slide 3">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=4" alt="slide 4">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=5" alt="slide 5">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=6" alt="slide 6">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=7" alt="slide 7">
</div>
<div class="carousel-item col-md-4">
<img class="img-fluid mx-auto d-block" src="//placehold.it/600x400?text=8" alt="slide 7">
</div>
</div>
<a class="carousel-control-prev" href="#test" role="button" data-slide="prev">
<i class="fa fa-chevron-left fa-lg text-muted"></i>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next text-faded" href="#test" role="button" data-slide="next">
<i class="fa fa-chevron-right fa-lg text-muted"></i>
<span class="sr-only">Next</span>
</a>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="../js/my_js_main.js" crossorigin="anonymous"></script>
</body>
</html>
这篇关于将这个修改后的bootstrap 4轮播加倍，只能正常运行一半(滚动循环停止工作)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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