JavaScript实现图片切换效果

前端之家收集整理的这篇文章主要介绍了JavaScript实现图片切换效果前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。

本文实例为大家分享了JavaScript实现图片切换效果自定义属性的应用 供大家参考,具体内容如下

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<Meta charset="UTF-8"> <a href="/tag/tupian/" target="_blank" class="keywords">图片</a>切换实例@H_<a href="/tag/301/" target="_blank" class="keywords">301</a>_6@ <style> body{ background-color: #A9A9A9; margin:0px; } ul{ padding: 0; margin: 0; } li{ list-style: none; } #pic{ width:670px; height: 420px; position:relative; margin: 0 auto;/*整个div放到<a href="/tag/yemian/" target="_blank" class="keywords">页面</a>中间的位置*/ background:url(img/loading.png) no-repeat center; background-color:#fff; <pre><code> } #pic img{ width:670px; height: 420px; } #pic ul{ position: absolute; top: 0px; right: -50px; } #pic li{ width:40px; height:40px; margin-bottom: 4px; background:#666; } #pic .active{ background: cadetblue; } #pic span{ top:0px; } #pic p{ bottom:0px; margin:0; } #pic p,#pic span{ width: 670px; height: 30px; line-height: 30px; text-align: center; position:absolute; left:0px; color:#fff; background-color:#333; } </style> <script> window.onload = function(){ var oDiv = document.getElementById("pic"); var oImg = document.getElementsByTagName("img")[0];//有tag<a href="/tag/biaoqian/" target="_blank" class="keywords">标签</a>的地方就得有数组[0],否则不<a href="/tag/tishicuowu/" target="_blank" class="keywords">提示错误</a>,但却会加载不出来需要的<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>。 var oP = document.getElementsByTagName("p")[0]; var oNum = document.getElementsByTagName("span")[0]; var oUl = document.getElementsByTagName("ul")[0]; var aLi = oUl.getElementsByTagName("li");//通过父<a href="/tag/biaoqian/" target="_blank" class="keywords">标签</a>找到的子<a href="/tag/biaoqian/" target="_blank" class="keywords">标签</a>,这里不能加数组[0] var arrUrl = ["img/1.jpg","img/2.jpg","img/3.jpg","img/4.jpg","img/5.png"]; var arrText = ["中原工学院图书馆","中工宿舍楼","玫瑰花","小猫咪","绿色盆栽"]; for(var i=0;i<arrUrl.length;i++){ oUl.innerHTML += "<li></li>";//<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>用“+=”,该写用“=” } //初始化 //有数组的地方,大部分都有一个数字在静静的等待.数组配合数字以便找到需要的<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>。 var num = 0; oImg.src = arrUrl[num]; oP.innerHTML = arrText[num]; oNum.innerHTML = 1+num+'/'+arrUrl.length; //在ul中<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>li,根据数组的长度,为ul<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>li的<a href="/tag/shuliang/" target="_blank" class="keywords">数量</a> aLi[num].className = "active";//为<a href="/tag/biaoqian/" target="_blank" class="keywords">标签</a><a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>class<a href="/tag/shuxing/" target="_blank" class="keywords">属性</a>,需要用到className for(i=0;i<aLi.length;i++){ aLi[i].index = i;//索引值,需要<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>对应关系,就要想到<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>索引值 //定义的有数组,就不能忘记加[0] aLi[i].onclick = function(){ //点击按钮,找到与之对应的<a href="/tag/tupian/" target="_blank" class="keywords">图片</a> oImg.src = arrUrl[this.index]; oP.innerHTML = arrText[this.index]; oNum.innerHTML = 1+this.index+'/'+arrUrl.length; //<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>对应的点击时,li的图标发生变化,两种思路 //思路1:清空当前所有active样式,为当前<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>此class<a href="/tag/shuxing/" target="_blank" class="keywords">属性</a>(扩展性好,但是运行速度可能不好) for(var i=0; i<aLi.length; i++){ aLi[i].className = ""; } this.className = "active"; //思路2:清空前一个点击li的样式,为当前<a href="/tag/tianjia/" target="_blank" class="keywords">添加</a>class<a href="/tag/shuxing/" target="_blank" class="keywords">属性</a>(定点清除) } } } </script></code></pre> </head> <body> <div id="pic" > <pre><code> <img src=""/&gt; <span><a href="/tag/shuliang/" target="_blank" class="keywords">数量</a><a href="/tag/zhengzaijiazaizhong/" target="_blank" class="keywords">正在加载中</a>......</span> <p><a href="/tag/wenzi/" target="_blank" class="keywords">文字</a>说明<a href="/tag/zhengzaijiazaizhong/" target="_blank" class="keywords">正在加载中</a>......</p> <ul> </ul> </div></code></pre> </body> </html> </pre> </div> <p>JavaScript<a href="/tag/daima/" target="_blank" class="keywords">代码</a>片段可以简化成如下:</p> <p><div class="jb51code"><br /> <pre class="brush:js;"></p> <script> <pre><code> window.onload = function(){ var oDiv = document.getElementById("pic"); var oImg = document.getElementsByTagName("img")[0]; var oP = document.getElementsByTagName("p")[0]; var oNum = document.getElementsByTagName("span")[0]; var oUl = document.getElementsByTagName("ul")[0]; var aLi = oUl.getElementsByTagName("li"); var arrUrl = ["img/1.jpg","绿色盆栽"]; for(var i=0;i<arrUrl.length;i++){ oUl.innerHTML += "<li></li>"; } //初始化 var num = 0; function fnTab(){ oImg.src = arrUrl[num]; oP.innerHTML = arrText[num]; oNum.innerHTML = 1+num+'/'+arrUrl.length; aLi[num].className = ""; } fnTab(); for(i=0;i<aLi.length;i++){ aLi[i].index = i; aLi[i].onclick = function(){ num = this.index; fnTab(); } aLi[num].className = "active"; } } } </code></pre> </script> </pre> </div> <p><a href="/tag/xiaoguo/" target="_blank" class="keywords">效果</a>图: </p> <p style="text-align: center"><img id="theimg" src="https://files.jb51.cc/file_images/article/201708/201781290340338.jpg?20177129355" alt="" /></p> <p>不会做动图!明天再试试!</p> <p>以上就是本文的全部<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>,希望对大家的学习有所帮助,也希望大家多多<a href="/tag/zhichi/" target="_blank" class="keywords">支持</a>编程之家。</p></div> <div class="topcard-tags"><a href="/tag/jsp/" class="tag_link" target="_blank">js</a><a href="/tag/tupianqiehuan/" class="tag_link" target="_blank">图片切换</a></div> <ul class="list-group"> <li class="list-group-item"><a href="/js/37213.html" title="浅谈angularJS的$watch失效问题的解决方案">上一篇:浅谈angularJS的$watch失效问题的解</a><a href="/js/37206.html" title="浅谈angular2 组件的生命周期钩子" class="text-muted pull-right">下一篇:浅谈angular2 组件的生命周期钩子</a> </li> </ul> </div> </div> </div> <!-- row end --> <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-4605373693034661" data-ad-slot="9144498553"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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