添加一个Carousel幻灯片库

Question

我正在学习HTML, CSS和Java。我试图添加到我的网站幻灯片，但我不明白为什么我没有看到什么，当我试图运行它。我找到了这个，我试着让它工作，但我看不到一个图像，我只能看到指针去下一个或返回。

<!-- Slideshow container -->
<div class="slideshow-container">
<!-- Full-width images with number and caption text -->
<div class="mySlides fade">
<div class="numbertext">1 / 9</div>
<img src="FotoGP.jpg" style="width:100%">

</div>

<div class="mySlides fade">
<div class="numbertext">2 / 9</div>
<img src="FotoSalaPesi.jpg" style="width:100%">
<div class="text">Sala Pesi</div>
</div>

<div class="mySlides fade">
<div class="numbertext">3 / 9</div>
<img src="FotoSalaCardio.jpg" style="width:100%">
<div class="text">Cardio</div>
</div>
<div class="mySlides fade">
<div class="numbertext">4 / 9</div>
<img src="FotoSalaCircuiti.jpg" style="width:100%">
<div class="text">Circuiti Funzionali</div>
</div>

<div class="mySlides fade">
<div class="numbertext">5 / 9</div>
<img src="FotoSalaAddominali.jpg" style="width:100%">
</div>
<div class="mySlides fade">
<div class="numbertext">6 / 9</div>
<img src="FotoSalaGambe.jpg" style="width:100%">
</div>
<div class="mySlides fade">
<div class="numbertext">7 / 9</div>
<img src="FotoSalaBilanceri.jpg" style="width:100%">
<div class="text">Sala Pesi</div>
</div>
<div class="mySlides fade">
<div class="numbertext">8 / 9</div>
<img src="FotoAperto.jpg" style="width:100%">
<div class="text">All'aperto</div>
</div>
<div class="mySlides fade">
<div class="numbertext">9 / 9</div>
<img src="FotoUfficio.jpg" style="width:100%">
</div>

<!-- Next and previous buttons -->
<a class="prev" onclick="plusSlides(-1)">&#10094;</a>
<a class="next" onclick="plusSlides(1)">&#10095;</a>
</div>
<br>

<!-- The dots/circles -->
<div style="text-align:center">
<span class="dot" onclick="currentSlide(1)"></span>
<span class="dot" onclick="currentSlide(2)"></span>
<span class="dot" onclick="currentSlide(3)"></span>
<span class="dot" onclick="currentSlide(4)"></span>
<span class="dot" onclick="currentSlide(5)"></span>
<span class="dot" onclick="currentSlide(6)"></span>
<span class="dot" onclick="currentSlide(7)"></span>
<span class="dot" onclick="currentSlide(8)"></span>
<span class="dot" onclick="currentSlide(9)"></span>
</div>

这是CSS部分

* {box-sizing:border-box}
/* Slideshow container */
.slideshow-container {
max-width: 100%;
position: relative;
margin: auto;
}
/* Hide the images by default */
.mySlides {
display: none;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
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 black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}
/* Caption text */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* The dots/bullets/indicators */
.dot {
cursor: pointer;
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active, .dot:hover {
background-color: #717171;
}
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

和JS

var slideIndex = 1;
showSlides(slideIndex);
// Next/previous controls
function plusSlides(n) {
showSlides(slideIndex += n);
}
// Thumbnail image controls
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
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";
}

var slideIndex = 0;
showSlides();
function showSlides() {
var i;
var slides = document.getElementsByClassName("mySlides");
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slideIndex++;
if (slideIndex > slides.length) {slideIndex = 1}
slides[slideIndex-1].style.display = "block";
setTimeout(showSlides, 2000); // Change image every 2 seconds
}

我错过了什么?谢谢你的帮助!

Answer 1

您的图片路径似乎不对

看，它与占位符一起工作

var slideIndex = 1;
showSlides(slideIndex);
// Next/previous controls
function plusSlides(n) {
showSlides(slideIndex += n);
}
// Thumbnail image controls
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
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";
}

var slideIndex = 0;
showSlides();
function showSlides() {
var i;
var slides = document.getElementsByClassName("mySlides");
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slideIndex++;
if (slideIndex > slides.length) {
slideIndex = 1
}
slides[slideIndex - 1].style.display = "block";
setTimeout(showSlides, 2000); // Change image every 2 seconds
}

* {
box-sizing: border-box
}

/* Slideshow container */
.slideshow-container {
max-width: 100%;
position: relative;
margin: auto;
}

/* Hide the images by default */
.mySlides {
display: none;
}

/* Next & previous buttons */
.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
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 black background color with a little bit see-through */
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}

/* Caption text */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}

/* The dots/bullets/indicators */
.dot {
cursor: pointer;
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active,
.dot:hover {
background-color: #717171;
}

/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}

<div class="slideshow-container">
<!-- Full-width images with number and caption text -->
<div class="mySlides fade">
<div class="numbertext">1 / 9</div>
<img src="https://via.placeholder.com/150" style="width:100%">
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 9</div>
<img src="https://via.placeholder.com/150" style="width:100%">
<div class="text">Sala Pesi</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 9</div>
<img src="https://via.placeholder.com/150" style="width:100%">
<div class="text">Cardio</div>
</div>
<div class="mySlides fade">
<div class="numbertext">4 / 9</div>
<img src="https://via.placeholder.com/150" style="width:100%">
<div class="text">Circuiti Funzionali</div>
</div>
<div class="mySlides fade">
<div class="numbertext">5 / 9</div>
<img src="https://via.placeholder.com/150" style="width:100%">
</div>
<div class="mySlides fade">
<div class="numbertext">6 / 9</div>
<img src="FotoSalaGambe.jpg" style="width:100%">
</div>
<div class="mySlides fade">
<div class="numbertext">7 / 9</div>
<img src="FotoSalaBilanceri.jpg" style="width:100%">
<div class="text">Sala Pesi</div>
</div>
<div class="mySlides fade">
<div class="numbertext">8 / 9</div>
<img src="FotoAperto.jpg" style="width:100%">
<div class="text">All'aperto</div>
</div>
<div class="mySlides fade">
<div class="numbertext">9 / 9</div>
<img src="FotoUfficio.jpg" style="width:100%">
</div>

<!-- Next and previous buttons -->
<a class="prev" onclick="plusSlides(-1)">&#10094;</a>
<a class="next" onclick="plusSlides(1)">&#10095;</a>
</div>
<br>
<!-- The dots/circles -->
<div style="text-align:center">
<span class="dot" onclick="currentSlide(1)"></span>
<span class="dot" onclick="currentSlide(2)"></span>
<span class="dot" onclick="currentSlide(3)"></span>
<span class="dot" onclick="currentSlide(4)"></span>
<span class="dot" onclick="currentSlide(5)"></span>
<span class="dot" onclick="currentSlide(6)"></span>
<span class="dot" onclick="currentSlide(7)"></span>
<span class="dot" onclick="currentSlide(8)"></span>
<span class="dot" onclick="currentSlide(9)"></span>
</div>

Answer 2

我不知道你对HTML有多陌生，但这里有一些常见的修复:

• 确保你的图像来源是正确的。如果它们在另一个目录中，则包括图像的相对路径。例:<img src="images/FotoAperto.jpg">

• 确保你的css导入正确。<link rel="stylesheet" href="style.css">

• 检查您的JS脚本是否导入正确，并将<script>标签放置在关闭</body>标签<script src="index.js"></script>之后。

我希望它有帮助:)