如何将多图片整合到单个Lightbox实现滑动效果？代码求助

嘿，我明白你的需求了——就是要把所有图片都整合进同一个Lightbox，点击任意一张都能打开，然后左右滑动切换所有图片对吧？你的现有代码其实已经搭好了Lightbox的核心框架，只需要调整图片的组织方式，把所有图片都纳入同一个滑动组里就行。下面是修改后的完整代码，我还加了第5张图片作为示例，你可以照着这个逻辑扩展更多图片：

<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Verdana, sans-serif;
margin: 0;
}
* {
box-sizing: border-box;
}
.row > .column {
padding: 0 8px;
}
.row:after {
content: "";
display: table;
clear: both;
}
/* 这里根据图片数量调整宽度，5张就设20%，6张设16.66%，以此类推 */
.column {
float: left;
width: 20%;
}
/* The Modal (background) */
.modal {
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: black;
}
/* Modal Content */
.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
width: 90%;
max-width: 1200px;
}
/* The Close Button */
.close {
color: white;
position: absolute;
top: 10px;
right: 25px;
font-size: 35px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: #999;
text-decoration: none;
cursor: pointer;
}
.mySlides {
display: none;
}
.cursor {
cursor: pointer
}
/* Next & previous buttons */
.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -50px;
color: white;
font-weight: bold;
font-size: 20px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
-webkit-user-select: none;
}
/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
img {
margin-bottom: -4px;
}
.caption-container {
text-align: center;
background-color: black;
padding: 2px 16px;
color: white;
}
.demo {
opacity: 0.6;
}
.active,
.demo:hover {
opacity: 1;
}
img.hover-shadow {
transition: 0.3s
}
.hover-shadow:hover {
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19)
}
</style>
<body>
<h2 style="text-align:center">Lightbox</h2>
<div class="row">
<!-- 第1张缩略图 -->
<div class="column">
<img src="img_nature.jpg" style="width:100%" onclick="openModal();currentSlide(1)" class="hover-shadow cursor">
</div>
<!-- 第2张缩略图 -->
<div class="column">
<img src="img_fjords.jpg" style="width:100%" onclick="openModal();currentSlide(2)" class="hover-shadow cursor">
</div>
<!-- 第3张缩略图 -->
<div class="column">
<img src="img_mountains.jpg" style="width:100%" onclick="openModal();currentSlide(3)" class="hover-shadow cursor">
</div>
<!-- 第4张缩略图 -->
<div class="column">
<img src="img_lights.jpg" style="width:100%" onclick="openModal();currentSlide(4)" class="hover-shadow cursor">
</div>
<!-- 新增第5张缩略图 -->
<div class="column">
<img src="img_forest.jpg" style="width:100%" onclick="openModal();currentSlide(5)" class="hover-shadow cursor">
</div>
</div>

<div id="myModal" class="modal">
<span class="close cursor" onclick="closeModal()">&times;</span>
<div class="modal-content">
<!-- 第1张大图 -->
<div class="mySlides">
<div class="numbertext">1 / 5</div>
<img src="img_nature_wide.jpg" style="width:100%">
</div>
<!-- 第2张大图 -->
<div class="mySlides">
<div class="numbertext">2 / 5</div>
<img src="img_fjords_wide.jpg" style="width:100%">
</div>
<!-- 第3张大图 -->
<div class="mySlides">
<div class="numbertext">3 / 5</div>
<img src="img_mountains_wide.jpg" style="width:100%">
</div>
<!-- 第4张大图 -->
<div class="mySlides">
<div class="numbertext">4 / 5</div>
<img src="img_lights_wide.jpg" style="width:100%">
</div>
<!-- 新增第5张大图 -->
<div class="mySlides">
<div class="numbertext">5 / 5</div>
<img src="img_forest_wide.jpg" style="width:100%">
</div>

<a class="prev" onclick="plusSlides(-1)">&#10094;</a>
<a class="next" onclick="plusSlides(1)">&#10095;</a>

<div class="caption-container">
<p id="caption"></p>
</div>

<!-- 底部缩略图导航 -->
<div class="column">
<img class="demo cursor" src="img_nature_wide.jpg" style="width:100%" onclick="currentSlide(1)" alt="Nature and sunrise">
</div>
<div class="column">
<img class="demo cursor" src="img_fjords_wide.jpg" style="width:100%" onclick="currentSlide(2)" alt="Trolltunga, Norway">
</div>
<div class="column">
<img class="demo cursor" src="img_mountains_wide.jpg" style="width:100%" onclick="currentSlide(3)" alt="Mountains and fjords">
</div>
<div class="column">
<img class="demo cursor" src="img_lights_wide.jpg" style="width:100%" onclick="currentSlide(4)" alt="Northern Lights">
</div>
<!-- 新增底部第5张缩略图 -->
<div class="column">
<img class="demo cursor" src="img_forest_wide.jpg" style="width:100%" onclick="currentSlide(5)" alt="Green Forest">
</div>
</div>
</div>

<script>
function openModal() {
document.getElementById('myModal').style.display = "block";
}
function closeModal() {
document.getElementById('myModal').style.display = "none";
}
var slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("demo");
var captionText = document.getElementById("caption");
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
slides[slideIndex-1].style.display = "block";
dots[slideIndex-1].className += " active";
captionText.innerHTML = dots[slideIndex-1].alt;
}
</script>
</body>
</html>

关键改动说明： #

1. 调整缩略图宽度：把.column的width从25%改成20%（对应5张图片），如果是6张就改成16.66%，确保所有缩略图能在一行排列。
2. 新增图片元素：在.row里添加新的缩略图，同时在modal-content里对应添加.mySlides大图容器，以及底部的缩略图导航项。
3. 统一序号关联：每张图片的currentSlide(n)里的序号n要和它对应的.mySlides、底部缩略图的序号完全一致，这样点击才能正确切换到对应图片。
4. 更新序号文本：比如第5张的numbertext改成5 / 5，保证显示的计数准确。

这样修改后，所有图片就都在同一个Lightbox里了，点击任意一张都能打开，然后通过左右箭头或者底部缩略图切换所有图片，完全符合你想要的效果~

内容的提问来源于stack exchange，提问作者user8558464