淡入淡出图像滑块单击上一步下一步按钮

时间：2017-09-27 00:29:55

标签： javascript css gallery

我正在创建一个包含缩略图和上一个和下一个按钮的图像滑块。当您单击与主图像不同的缩略图时，我希望它淡入新图像。前一个和下一个按钮也是如此。

我有一个淡入淡出的网络套件动画，但它不起作用。这是codepen。

$('#imgDetail li img').click(function(){
    $('#unidoor').attr('src',$(this).attr('src'));
});
$('#next').on('click',function(){
 var imgSrc = $('#unidoor').attr('src');
    var nextSrc = $('ul img[src="'+imgSrc+'"]').closest('li').next().find('img').attr('src');
    console.log(nextSrc);
    nextSrc ==undefined?$('#unidoor').attr('src',$('ul img:first').attr('src')): $('#unidoor').attr('src',nextSrc);
});
$('#prev').on('click',function(){
 var imgSrc = $('#unidoor').attr('src');
    var nextSrc = $('ul img[src="'+imgSrc+'"]').closest('li').prev().find('img').attr('src');
    console.log(nextSrc);
    nextSrc ==undefined?$('#unidoor').attr('src',$('ul img:last').attr('src')): $('#unidoor').attr('src',nextSrc);
});
* {
  margin: 0;
  padding: 0;
}

body{
  margin: 0;
  padding:0;
  font-size: 100%;
/*   line-height: 1.6; */
/*   font-family: Arial, Helvetica, sans-serif; */
}

.header{
  margin: 0 auto;
  width: 100%;
  background-color: #333;
  padding: 30px 0 0 0; 
}

.header h1{
  margin: 0;
  text-align: center;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
}

.header ul {
  list-style-type: none;
  margin: 0;
/*   padding: 0; */
  overflow: hidden;
  padding: 20px 0px 30px 0;
  text-align: center;
}

.header li {
  display: block;
  display: inline-block;
/*   border-right: 1px solid #bbb; */
  border-right: 1px solid #bbb;
  height: 25px;
}

.header li:last-child{
  border-right: none;
}

.header li a {
  display: block;
  color: white;
  text-align: center;
  text-decoration: none;
  padding: 0px 40px;
  font-size: 1em;
}

.header li a:hover{
  color: #7bbe9a;
/*   color: #80b198; */
}

#green-room {
  background: #333 !important;
}

.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

#unidoor {
/*   position: relative; */
  width: 90%;
  margin: 0 auto;
  display: block;
}

#prev {
  position: absolute;
  float: left;
  bottom: 55%;
  left: 5%;
  cursor: pointer;
  font-weight: bold;
}

#next {
  position: absolute;
  float: right;
  bottom: 55%;
  right: 5%;
  cursor: pointer;
  font-weight: bold;
  width: auto;
}

.previous {
  background-color: #fff;
  opacity: 0.5;
  color: black;
  width: auto;
}

.next {
  background-color: #fff;
  opacity: 0.5;
  color: black;
}

#imgDetail a {
    text-decoration: none;
    display: inline-block;
    padding: 8px 16px;
}

#imgDetail a:hover {
  background-color: #7bbe9a;
  color: white;
  opacity: 1;
}

#imgDetail ul {
  margin: 0 auto;
  display: block;
  width: 50%;
}

/* fade 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}
}

.thumb { 
  width: 25%; 
  height: auto; 
  margin: 15px 5px 0 5px;
}

#imgDetail li { 
  display: inline; margin-right: 10px; 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Daniel Pollack</title>
    <link rel="stylesheet" type="text/css" href="css/styles.css"/>
  </head>

  <body id="green-room">
  	<div class="header">
      <div id="title"><h1>Lorem Ipsum 3D Online Portfolio</h1></div>
      <nav id="menu">
        <ul>
          <li><a href="index.html">Home</a></li>
          <li><a href="index.html#portfolio">Portfolio</a></li>
          <li><a href="#about">About</a></li>
          <li><a href="#contact">Contact</a></li>
        </ul>
      </nav>
    </div>
    
<div class="slideshow-container">
<div id="imgDetail">
  <br>
    <img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_1.jpg" alt="" id="unidoor" />
  <a href="#" id="prev" class="prev-next-button previous">&#8249;</a>
<a href="#" id="next" class="prev-next-button next">&#8250;</a>
  
    <ul>
      <li><img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_1.jpg" id="fade" class="thumb" /></li>
      <li><img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_2.jpg" id="fade" class="thumb" /></li>
      <li><img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_3.jpg" id="fade" class="thumb" /></li>
    </ul>
</div>
    </div>
    
    <script src="https://unpkg.com/scrollreveal/dist/scrollreveal.min.js"></script>
    <script>
      window.sr = ScrollReveal({reset: true});
      sr.reveal('#unidoor');
    </script>
    
    </body>

</html>

1 个答案:

答案 0 :(得分：0)

在您的方法中，您需要执行一些代码，我在您的代码中进行了一些更改，您可以在代码示例中看到它。

首先，您需要根据需要滑动的图像创建缩略图。

其次，您不应该将每个图像的src属性设置为下一个src（图像URL），因为每次执行此操作时都要下载图像，您应该将所有图像保存在缓存中并下载他们一次。

第三，您应该只在一个函数中听取箭头previous和next的onclick事件，也许最好将它们分成两个函数来为下一个和上一个按钮分配单一的责任。

第四，你应该只使用css类来为每张幻灯片制作淡入淡出效果，不像动画那么复杂，在演示代码中我创建了active类，使其作为淡入淡出效果

我希望你能发现它有用。

$(document).ready(function(){
	// get all images loaded
  var images = $(".unidoor-class");
	// thumbnails containers
  var thumbnailContainer = $("#thumbnails");
    // generate thumbnail images
  generateThumbnails(images, thumbnailContainer);
  // listeners for controls arrows
	$(".prev-next-button").on("click", function() {
  	// get the images
    var currentImageIndex = $(".unidoor-class.active").index();
		var isPrevious = $(this).hasClass("previous");
    var nextIndex;
    if (isPrevious) {
    	if (currentImageIndex === 0) {
      	nextIndex = images.length - 1;
      }
      
      if (currentImageIndex > 0) {
      	nextIndex = currentImageIndex - 1;
      }
    } else {
    	if (currentImageIndex === images.length - 1) {
      	nextIndex = 0;
      }
      
      if (currentImageIndex < images.length - 1) {
      	nextIndex = currentImageIndex + 1;
      }
    }
		
    // remove any active class from images
		images.removeClass("active");
    // get the next active image and add active class to that next current image
    $(images[nextIndex]).addClass("active");
  });
  
  $(".thumb").on("click", function(event){
	  event.preventDefault();
    var indexSelected = $(this).data("img-index");
    var currentShown = $(".unidoor-class.active").index();
    if (currentShown === indexSelected) return false;
    images.removeClass("active");
    $(images[indexSelected]).addClass('active');
  });
  
  function generateThumbnails(images, container) {
  	var ul = $("<ul>");
  	images.each(function(index, element){
    	var currentThumb = $("<img>");
      var li = $("<li>");
      var src = $(this).attr("src");
      currentThumb.attr("src", src);
      currentThumb.attr("class", "thumb");
      currentThumb.data("img-index", index);
      li.append(currentThumb);
      ul.append(li);
    });
    container.append(ul);
  }
});
* {
  margin: 0;
  padding: 0;
}

body{
  margin: 0;
  padding:0;
  font-size: 100%;
/*   line-height: 1.6; */
/*   font-family: Arial, Helvetica, sans-serif; */
}

.header{
  margin: 0 auto;
  width: 100%;
  background-color: #333;
  padding: 30px 0 0 0; 
}

.header h1{
  margin: 0;
  text-align: center;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
}

.header ul {
  list-style-type: none;
  margin: 0;
/*   padding: 0; */
  overflow: hidden;
  padding: 20px 0px 30px 0;
  text-align: center;
}

.header li {
  display: block;
  display: inline-block;
/*   border-right: 1px solid #bbb; */
  border-right: 1px solid #bbb;
  height: 25px;
}

.header li:last-child{
  border-right: none;
}

.header li a {
  display: block;
  color: white;
  text-align: center;
  text-decoration: none;
  padding: 0px 40px;
  font-size: 1em;
}

.header li a:hover{
  color: #7bbe9a;
/*   color: #80b198; */
}

#green-room {
  background: #333 !important;
}

.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

#unidoor, .unidoor-class {
  position: absolute;
  width: 100%;
  margin: 0 auto;
  display: block;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity .5s;
}

.unidoor-class.active {
  position: relative;
  opacity: 1;
}

#prev {
  position: absolute;
  float: left;
  bottom: 55%;
  left: 5%;
  cursor: pointer;
  font-weight: bold;
}

#next {
  position: absolute;
  float: right;
  bottom: 55%;
  right: 5%;
  cursor: pointer;
  font-weight: bold;
  width: auto;
}

.previous {
  background-color: #fff;
  opacity: 0.5;
  color: black;
  width: auto;
}

.next {
  background-color: #fff;
  opacity: 0.5;
  color: black;
}

#imgDetail {
  position: relative;
  width: 90%;
  margin: 0 auto;
}

#imgDetail a {
    text-decoration: none;
    display: inline-block;
    padding: 8px 16px;
}

#imgDetail a:hover {
  background-color: #7bbe9a;
  color: white;
  opacity: 1;
}

#imgDetail ul {
  margin: 0 auto;
  display: block;
  width: 50%;
}

/* fade 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}
}

.thumb { 
  width: 25%; 
  height: auto; 
  margin: 15px 5px 0 5px;
}

#imgDetail li { 
  display: inline; margin-right: 10px; 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="slideshow-container">
  <div id="imgDetail">
    <img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_1.jpg" class="unidoor-class active" />
    <img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_2.jpg" class="unidoor-class" />
    <img src="http://www.davidwightman.net/_images_landscape/Behemot/Behemot_detail_3.jpg" class="unidoor-class" />
    <!--CONTROLS-->
    <a href="#" id="prev" class="prev-next-button previous">&#8249;</a>
    <a href="#" id="next" class="prev-next-button next">&#8250;</a>
    <!--Thumbnails-->
    <div id="thumbnails">
    </div>
  </div>
</div>

相关问题
最新问题