如何使用html将图片放在幻灯片上？ w3模板

编程问答 2022-06-10

问题描述

我正在使用Html和Css开发一个网站，并且我一直试图将图像放在幻灯片放映中，我搜索了整个堆栈溢出和无数其他网站，但仍然找不到任何解决方案或答案使用与我编写的代码相似的代码。

<title>W3.CSS</title>
<Meta name="viewport" content="width=device-width,initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none;}
</style>
<body>


<div class="w3-content w3-display-container">
  <img class="mySlides" src="pancakes.jpeg" style="width: 75%">
  <img class="mySlides" src="acai.jpg" style="width: 75%">
  <img class="mySlides" src="avocado.jpg" style="width: 75%">
  

  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1)">&#10095;</button>
</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  x[slideIndex-1].style.display = "block";  
}
</script>

(Screen Shot 2020-10-02 at 11.45.59 PM.png)

解决方法

尝试一下

<title>W3.CSS</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none;margin:auto}
</style>
<body>


<div class="w3-content w3-display-container">
  <img class="mySlides" src="pancakes.jpeg">
  <img class="mySlides" src="acai.jpg">
  <img class="mySlides" src="avocado.jpg">
  

  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1)">&#10095;</button>
</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  x[slideIndex-1].style.display = "block";  
}
</script>

我在margin:auto类中添加了.mySlides，并从img标签中删除了width:75%

,

尝试一下

<title>W3.CSS</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none;}
</style>
<body>


<div class="w3-content w3-display-container">
  <img class="mySlides" src="pancakes.jpeg" style="max-width: inherit; max-height: inherit">
  <img class="mySlides" src="acai.jpg" style="max-width: inherit; max-height: inherit">
  <img class="mySlides" src="avocado.jpg" style="max-width: inherit; max-height: inherit">
  

  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1)">&#10095;</button>
</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  x[slideIndex-1].style.display = "block";  
}
</script>

不要对图像标签应用特殊的宽度或高度，而应使img继承其容器，以便每个img都具有相同的大小并完全占据容器。

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