javascript - HTML 幻灯片代码

标签 javascript jquery html css slideshow

所以我正在学习使用 CSS 和 Javascript 创建 HTML 幻灯片。 :D

我尝试完成 W3School 提供的教程:http://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow

<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1">

<style>
* {box-sizing:border-box}
body {font-family: Verdana,sans-serif;margin:0}
.mySlides {display:none}

/* 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;
}

/* 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: 13px;
  width: 13px;
  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}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .prev, .next,.text {font-size: 11px}
}
</style>
<body>

<div class="slideshow-container">

<div class="mySlides fade">
  <div class="numbertext">1 / 3</div>
  <img src="http://i.imgur.com/7Bw2RfP.jpg?1" style="width:100%">
  <div class="text">50. Assetto Corsa<br>
Genre: Action RPG, Hack n Slash<br>
Year: 2013<br>
Platforms: Windows, Xbox One, PS4<br>
Developer: Kunos Simulazioni<br>
Mode: Single-Player, Multi-Player</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">2 / 3</div>
  <img src="http://i.imgur.com/8nEDMdN.jpg?1" style="width:100%">
  <div class="text">Caption Two</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">3 / 3</div>
  <img src="http://i.imgur.com/WM3Dmu4.jpg?1" style="width:100%">
  <div class="text">Caption Three</div>
</div>

<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>

</div>
<br>

<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> 
</div>

<script>
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("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";
}
</script>

</body>
</html> 

我将图像源更改为 Imgur 上的图像源,例如:http://i.imgur.com/WJnFiST.png

  1. 当我将代码复制到 WYSIWYG 编辑器时,它只显示下面的按钮,而不显示图像。这是为什么? http://i.imgur.com/WM3Dmu4.jpg?1

  2. 更重要的是,如何使文本显示在图像下方而不是图像内部,并在图像发生变化时动态更改文本?

最佳答案

尝试回答问题 2 的一部分。

}

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

尝试将此 bottom: 8px; 更改为负数以获得图片下方的标题。准备好调整幻灯片放映容器的大小,为字幕腾出空间。

关于javascript - HTML 幻灯片代码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40945447/

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