javascript - 轮播与图像大小相同
问题描述
当单击图像时,我正在尝试创建一个画廊,它会弹出一个轮播。
我快到了,但是全尺寸时图像很大,所以我需要它变小,但它会在旋转木马上留下背景。
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 = "inline";
dots[slideIndex - 1].className += " active";
captionText.innerHTML = dots[slideIndex - 1].alt;
}
body {
font-family: Verdana, sans-serif;
margin: 0;
}
* {
box-sizing: border-box;
}
.row>.column {
padding: 0 8px;
}
.row:after {
content: "";
display: table;
clear: both;
}
.column {
float: left;
width: 25%;
background-color: black;
}
/* The Modal (background) */
.modal {
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: auto;
height: 100%;
overflow: auto;
background-color: black;
}
/* Modal Content */
.modal-content {
position: relative;
background-color: red;
margin: auto;
padding: 0;
width: auto;
}
/* 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);
}
<h2 style="text-align:center">Lightbox</h2>
<div class="row">
<div class="column">
<img src="https://i.imgur.com/AD3MbBi.jpg" style="width:300px" onclick="openModal();currentSlide(1)" class="hover-shadow cursor">
</div>
<div class="column">
<img src="https://i.imgur.com/M19Z4BO.png" style="width:300px" onclick="openModal();currentSlide(2)" class="hover-shadow cursor">
</div>
<div class="column">
<img src="https://i.imgur.com/9O8BzsM.jpg" style="width:300px" onclick="openModal();currentSlide(3)" class="hover-shadow cursor">
</div>
<div class="column">
<img src="https://i.imgur.com/UJTT5GK.jpg" style="width:300px" onclick="openModal();currentSlide(4)" class="hover-shadow cursor">
</div>
</div>
<div id="myModal" class="modal">
<span class="close cursor" onclick="closeModal()">×</span>
<div class="modal-content">
<div class="mySlides">
<div class="numbertext">1 / 4</div>
<img src="https://i.imgur.com/AD3MbBi.jpg" style="width:300px">
</div>
<div class="mySlides">
<div class="numbertext">2 / 4</div>
<img src="https://i.imgur.com/M19Z4BO.png" style="width:300px">
</div>
<div class="mySlides">
<div class="numbertext">3 / 4</div>
<img src="https://i.imgur.com/9O8BzsM.jpg" style="width:300px">
</div>
<div class="mySlides">
<div class="numbertext">4 / 4</div>
<img src="https://i.imgur.com/UJTT5GK.jpg" style="width:300px">
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
<div class="caption-container">
<p id="caption"></p>
</div>
<div class="column">
<img class="demo cursor" src="../window/img/img1.png" style="width:100%" onclick="currentSlide(1)" alt="Nature and sunrise">
</div>
<div class="column">
<img class="demo cursor" src="../window/img/img2.png" style="width:100%" onclick="currentSlide(2)" alt="Snow">
</div>
<div class="column">
<img class="demo cursor" src="../window/img/img3.png" style="width:100%" onclick="currentSlide(3)" alt="Mountains and fjords">
</div>
<div class="column">
<img class="demo cursor" src="../window/img/img4.png" style="width:100%" onclick="currentSlide(4)" alt="Northern Lights">
</div>
</div>
</div>
所发生情况的图片: https ://imgur.com/lipg9nD
正如您在图像中看到的那样,照片不在下一个/上一个箭头内,并且当它应该缩小/增长到图像大小时,有很多空白空间(红色)。
提前感谢您的帮助。
解决方案
将此添加到您的 CSS 样式中:
.modal-content .mySlides img{
display:block;
margin:auto;
}
它将使图像居中。进一步移动<a class="prev">
之前<div class="mySlides">
将其放置在左边距上。
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