如何创建 - 幻灯片库
了解如何使用 CSS 和 JavaScript 创建响应式幻灯片库。
幻灯片库
幻灯片用于循环播放元素:
创建幻灯片库
步骤 1) 添加 HTML:
实例
<!-- 图片库的容器 -->
<div class="container">
<!-- 带有数字文本的全宽图像 -->
<div class="mySlides">
<div class="numbertext">1 / 6</div>
<img src="img_woods_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">2 / 6</div>
<img src="img_5terre_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">3 / 6</div>
<img src="img_mountains_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">4 / 6</div>
<img src="img_lights_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">5 / 6</div>
<img src="img_nature_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">6 / 6</div>
<img src="img_snow_wide.jpg"
style="width:100%">
</div>
<!--
Next and previous buttons -->
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
<!-- Image text -->
<div
class="caption-container">
<p id="caption"></p>
</div>
<!-- Thumbnail images -->
<div class="row">
<div
class="column">
<img class="demo cursor" src="img_woods.jpg"
style="width:100%" onclick="currentSlide(1)" alt="The Woods">
</div>
<div class="column">
<img class="demo cursor" src="img_5terre.jpg" style="width:100%" onclick="currentSlide(2)"
alt="Cinque Terre">
</div>
<div class="column">
<img class="demo
cursor" src="img_mountains.jpg" style="width:100%" onclick="currentSlide(3)"
alt="Mountains and fjords">
</div>
<div class="column">
<img class="demo
cursor" src="img_lights.jpg" style="width:100%" onclick="currentSlide(4)"
alt="Northern Lights">
</div>
<div
class="column">
<img class="demo cursor" src="img_nature.jpg"
style="width:100%" onclick="currentSlide(5)" alt="Nature and sunrise">
</div>
<div class="column">
<img class="demo cursor" src="img_snow.jpg" style="width:100%" onclick="currentSlide(6)"
alt="Snowy Mountains">
</div>
</div>
</div>
步骤 2) 添加 CSS:
为图片库、下一个和上一个按钮、标题文本和圆点设置样式:
实例
* {
box-sizing: border-box;
}
/* 定位图片容器（需要定位左右箭头） */
.container {
position: relative;
}
/* 默认隐藏图片 */
.mySlides {
display: none;
}
/* 将鼠标悬停在缩略图上时添加一个指针 */
.cursor {
cursor: pointer;
}
/* Next & previous 按钮 */
.prev,
.next {
cursor: pointer;
position:
absolute;
top: 40%;
width: auto;
padding: 16px;
margin-top: -50px;
color: white;
font-weight: bold;
font-size: 20px;
border-radius: 0 3px 3px 0;
user-select:
none;
-webkit-user-select: none;
}
/* 将 "next button" 定位到右侧 */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* 悬停时，添加黑色背景颜色，有点透视 */
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
/* 数字文本（1/3 等）*/
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* 图片文本的容器 */
.caption-container {
text-align: center;
background-color: #222;
padding: 2px 16px;
color: white;
}
.row:after
{
content: "";
display: table;
clear: both;
}
/* 六列并排 */
.column {
float: left;
width:
16.66%;
}
/* 为缩略图添加透明效果 */
.demo {
opacity: 0.6;
}
.active,
.demo:hover {
opacity: 1;
}
步骤 3) 添加 JavaScript:
实例
var slideIndex = 1;
showSlides(slideIndex);
// Next/previous 控件
function plusSlides(n) {
showSlides(slideIndex += n);
}
// 缩略图图像控件
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;
}
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