网页制作 发布日期:2024/11/12 浏览次数:1
效果:
轮播图在向一个方向移动的同时,要对其每一个图片的大小,位置,透明度以及层级进行改变
原理:
轮播图向左移动时将第一个子元素剪切到末尾,轮播图向右移动时,将末尾子元素剪切到最前面,以此实现无缝轮播效果,再因为li剪切后,下一个li会补上(例如第一个子元素被剪切到最后时,第二个字元素会补上成为第一个子元素),所以li下标不变,以次来修改每一个位置的li的属性(大小,位置,透明度,层级)
HTML代码:
<body> <div class="smallBox"> <div class="arrowLeft">←</div> <div class="smallPicBox"> //用一个div存放一个ul,并对ul里的每一个li进行初始样式设置 <ul> <li id="li1" style="position: absolute;top:calc(50% - 200px);left: 0px;z-index:1;background-color: aqua;transform: scale(0.5);transition: 0.3s;opacity: 0.5;background-image: url(./images/01.jpg);background-size: cover;"></li> <li id="li2" style="position: absolute;top:calc(50% - 200px);left: 150px; z-index:2;background-color: red;transform: scale(0.7); transition: 0.3s;opacity: 0.7;background-image: url(./images/02.jpg);background-size: cover;"></li> <li id="li3" style="position: absolute;top:calc(50% - 200px);left: 300px; z-index:3;background-color: blue;transform: scale(0.9); transition: 0.3s;opacity: 0.9;background-image: url(./images/03.jpg);background-size: cover;"></li> <li id="li4" style="position: absolute;top:calc(50% - 200px);left: 450px; z-index:4;background-color: green;transform: scale(1); transition: 0.3s;opacity: 1;background-image: url(./images/04.jpg);background-size: cover;"></li> <li id="li5" style="position: absolute;top:calc(50% - 200px);left: 600px; z-index:3;background-color: yellow;transform: scale(0.9); transition: 0.3s;opacity: 0.9;background-image: url(./images/05.jpg);background-size: cover;"></li> <li id="li6" style="position: absolute;top:calc(50% - 200px);left: 750px; z-index:2;background-color: gray;transform: scale(0.7); transition: 0.3s;opacity: 0.7;background-image: url(./images/06.jpg);background-size: cover;"></li> <li id="li7" style="position: absolute;top:calc(50% - 200px);left: 900px; z-index:1;background-color: deeppink;transform: scale(0.5); transition: 0.3s;opacity: 0.5;background-image: url(./images/07.jpg);background-size: cover;"></li> </ul> </div> <div class="arrowRight">→</div> </div> </div> </body>
CSS代码:
<style> *{ margin: 0; padding: 0; list-style: none; } .albumBox{ width: 1200px; height: 400px; margin: 0 auto; border: 1px solid #000; } .smallBox{ height: 400px; line-height: 400px; position: relative; } .smallPicBox{ width: 1100px; height: 400px; float: left; position: relative; } .smallPicBox ul{ width: 100%; height: 400px; } .smallPicBox li{ width: 320px; height: 400px; float: left; border: 1px solid #000; box-sizing: border-box; } .smallBox .current::after{ content: "\25b2"; position: absolute; top: -31px; left: 70px; color: red; } .arrowLeft{ width: 50px; height: 400px; position: absolute; left: 0; border: 1px solid #000; box-sizing: border-box; background-color: gray; z-index: 10; } .arrowRight{ width: 50px; height: 400px; position: absolute; right: 0; border: 1px solid #000; box-sizing: border-box; background-color: gray; z-index: 10; } </style>
JS代码:
<script> var arrowLeft=document.querySelector(".arrowLeft") var arrowRight=document.querySelector(".arrowRight") var ul=document.querySelector(".smallPicBox ul") var li=document.querySelectorAll(".smallPicBox li") var timerId=0 arrowLeft.onclick=function(){ //左箭头点击事件 li=document.getElementsByTagName('li') ul.appendChild(li[0]) //将ul的第0个子元素剪切到末尾,实现无缝轮播 posi(li) //修改每一个li的属性 } arrowRight.onclick=function(){ //右箭头点击事件 li=document.getElementsByTagName('li') //重新获取li ul.insertBefore(li[6],li[0]) //将ul的最后一个子元素剪切到最前面,实现无缝轮播 posi(li) //修改每一个li的属性 } function posi(li){ //修改li属性函数 var n1=0 for(var x=0;x<li.length;x++){ //修改位置 li[x].style.left=n1+'px' n1=n1+150 } for(var i=0;i<li.length/2;i++){ //修改层级 li[i].style.zIndex=i+1 li[li.length-1-i].style.zIndex=i+1 } li[3].style.zIndex='4' var n2=0.3 for(var j=0;j<li.length/2;j++){ //缩放 n2=parseFloat(n2+0.2) li[j].style.transform='scale('+n2+')' li[li.length-1-j].style.transform='scale('+n2+')' } li[3].style.transform='scale(1)' var n3=0.3 for(var k=0;k<li.length/2;k++){ //修改透明度 n3=parseFloat(n3+0.2) li[k].style.opacity=n3 li[li.length-1-k].style.opacity=n3 } li[3].style.opacity='1' } //鼠标移入移出 temerId=setInterval(function(){ arrowLeft.click() }, 1000); arrowLeft.onmouseover=function(){ clearInterval(temerId) } arrowLeft.onmouseout=function(){ temerId=setInterval(function(){ arrowLeft.click() }, 1000); } arrowRight.onmouseover=function(){ clearInterval(temerId) } arrowRight.onmouseout=function(){ temerId=setInterval(function(){ arrowLeft.click() }, 1000); } </script>
注:本例js是直接写在body里的,也可以单独写一个js文件,在引入到html界面
效果图: