我是Web编码的新手,我不知道如何向w3school示例中添加另一个幻灯片显示...请参阅下文。我将不胜感激。
我了解,我必须在HTML中添加另一个幻灯片显示类,但是我不知道我需要在javaScript中进行什么更改,我试图添加另一个索引,但是它没有成功...
亲切的问候!
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box}
.mySlides1, .mySlides2 {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}
/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a grey background color */
.prev:hover, .next:hover {
background-color: #f1f1f1;
color: black;
}
</style>
</head>
<body>
<h2 style="text-align:center">Multiple Slideshows</h2>
<p>Slideshow 1:</p>
<div class="slideshow-container">
<div class="mySlides1">
<img src="img_nature_wide.jpg" style="width:100%">
</div>
<div class="mySlides1">
<img src="img_snow_wide.jpg" style="width:100%">
</div>
<div class="mySlides1">
<img src="img_mountains_wide.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 0)">❮</a>
<a class="next" onclick="plusSlides(1, 0)">❯</a>
</div>
<p>Slideshow 2:</p>
<div class="slideshow-container">
<div class="mySlides2">
<img src="img_band_chicago.jpg" style="width:100%">
</div>
<div class="mySlides2">
<img src="img_band_la.jpg" style="width:100%">
</div>
<div class="mySlides2">
<img src="img_band_ny.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 1)">❮</a>
<a class="next" onclick="plusSlides(1, 1)">❯</a>
</div>
<script>
var slideIndex = [1,1];
var slideId = ["mySlides1", "mySlides2"]
showSlides(1, 0);
showSlides(1, 1);
function plusSlides(n, no) {
showSlides(slideIndex[no] += n, no);
}
function showSlides(n, no) {
var i;
var x = document.getElementsByClassName(slideId[no]);
if (n > x.length) {slideIndex[no] = 1}
if (n < 1) {slideIndex[no] = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex[no]-1].style.display = "block";
}
</script>
</body>
</html>
我这样更改了代码,以实现第三次幻灯片播放。不幸的是,我的幻灯片只显示了一张图像,然后单击显示下一张图像,没有任何反应...有人可以帮我找到解决方案吗?
<p>Slideshow 3:</p>
<div class="slideshow-container">
<div class="mySlides3">
<img src="img_band_chicago.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_la.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_ny.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-3, 2)">❮</a>
<a class="next" onclick="plusSlides(3, 2)">❯</a>
</div>
<script>
var slideIndex = [3,3];
var slideId = ["mySlides1", "mySlides2", "mySlides3"]
showSlides(1, 0);
showSlides(1, 1);
showSlides(3, 2);
function plusSlides(n, no) {
showSlides(slideIndex[no] += n, no);
}
function showSlides(n, no) {
var i;
var x = document.getElementsByClassName(slideId[no]);
if (n > x.length) {slideIndex[no] = 1}
if (n < 1) {slideIndex[no] = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex[no]-1].style.display = "block";
}
</script>
答案 0 :(得分:1)
添加html:
<p>Slideshow 3:</p>
<div class="slideshow-container">
<div class="mySlides3">
<img src="img_band_chicago.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_la.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_ny.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 2)">❮</a>
<a class="next" onclick="plusSlides(1, 2)">❯</a>
</div>
将幻灯片ID更改为:
var slideId = ["mySlides1", "mySlides2", "mySlides3"]
添加此内容:
showSlides(1, 2);
更改为:
if (n < 2) {slideIndex[no] = x.length}
最终结果应为:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box}
.mySlides1, .mySlides2 {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}
/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a grey background color */
.prev:hover, .next:hover {
background-color: #f1f1f1;
color: black;
}
</style>
</head>
<body>
<h2 style="text-align:center">Multiple Slideshows</h2>
<p>Slideshow 1:</p>
<div class="slideshow-container">
<div class="mySlides1">
<img src="img_nature_wide.jpg" style="width:100%">
</div>
<div class="mySlides1">
<img src="img_snow_wide.jpg" style="width:100%">
</div>
<div class="mySlides1">
<img src="img_mountains_wide.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 0)">❮</a>
<a class="next" onclick="plusSlides(1, 0)">❯</a>
</div>
<p>Slideshow 2:</p>
<div class="slideshow-container">
<div class="mySlides2">
<img src="img_band_chicago.jpg" style="width:100%">
</div>
<div class="mySlides2">
<img src="img_band_la.jpg" style="width:100%">
</div>
<div class="mySlides2">
<img src="img_band_ny.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 1)">❮</a>
<a class="next" onclick="plusSlides(1, 1)">❯</a>
</div>
<p>Slideshow 3:</p>
<div class="slideshow-container">
<div class="mySlides3">
<img src="img_band_chicago.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_la.jpg" style="width:100%">
</div>
<div class="mySlides3">
<img src="img_band_ny.jpg" style="width:100%">
</div>
<a class="prev" onclick="plusSlides(-1, 2)">❮</a>
<a class="next" onclick="plusSlides(1, 2)">❯</a>
</div>
<script>
var slideIndex = [1,1];
var slideId = ["mySlides1", "mySlides2", "mySlides3"]
showSlides(1, 0);
showSlides(1, 1);
showSlides(1, 2);
function plusSlides(n, no) {
showSlides(slideIndex[no] += n, no);
}
function showSlides(n, no) {
var i;
var x = document.getElementsByClassName(slideId[no]);
if (n > x.length) {slideIndex[no] = 1}
if (n < 2) {slideIndex[no] = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex[no]-1].style.display = "block";
}
</script>
</body>
</html>