效果图如下： 哇咔咔，好low，并没有什么亮点～ 两份代码思路不同，但是感觉都差不多吧： 代码一： <!DOCTYPE html><html lang="en"><head> <meta c
效果图如下：
哇咔咔，好low，并没有什么亮点～
两份代码思路不同，但是感觉都差不多吧：
代码一：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>焦点轮播图Demo</title> <style type="text/css"> * { margin: 0; padding: 0; text-decoration: none; } body { padding: 20px; } #container { width: 600px; height: 400px; position: relative; overflow: hidden; border: 3px solid #333; } #list { width: 4200px; height: 400px; position: absolute; z-index: 1; left: -600px; } #list img { float: left; } #buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px; } #buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; -webkit-border-radius: 50%; -moz-border-radius: 50%; border-radius: 50%; background-color: #333; margin-right: 5px; } #buttons .on { background: orangered; } .arrow { cursor: pointer; text-align: center; position: absolute; z-index: 2; font-size: 36px; width: 40px; height: 40px; top: 180px; background-color: RGBA(0, 0, 0, .3); color: #fff; line-height: 45px; display: none; } .arrow:hover { background-color: RGBA(0, 0, 0, .7); } #container:hover .arrow { display: block; } #prev { left: 20px; } #next { right: 20px; } </style> <script type="text/javascript"> window.onload = function () { var container = document.getElementById('container'); var list = document.getElementById('list'); var buttons = document.getElementById('buttons').getElementsByTagName('span'); var prev = document.getElementById('prev'); var next = document.getElementById('next'); var animateComplete = true;//动画是否切换完成 var timer;//定时器 function setButtonClass(offset) { var index = Math.abs(offset / 600); for (var i = 0; i < buttons.length; i++) { if (buttons[i].className) { buttons[i].removeAttribute('class'); break; } } buttons[index - 1].setAttribute('class', 'on'); } function animated(offset) { animateComplete = false; var newLeft = parseInt(list.style.left) + offset; var time = 300;//位移总时间 var interval = 10;//位移的间隔时间 var speed = offset/(time/interval);//每次位移走的距离 function go(){ if((speed<0 && parseInt(list.style.left)>newLeft) || (speed>0 && parseInt(list.style.left)<newLeft)){ list.style.left = parseInt(list.style.left)+speed+'px'; setTimeout(go,interval); }else{ list.style.left = newLeft + 'px'; if (newLeft > -600) { list.style.left = -3000 + 'px'; } if (newLeft < -3000) { list.style.left = -600 + 'px'; } setButtonClass(parseInt(list.style.left)); animateComplete = true; } } go(); } function autoPlay(){ timer = setInterval(function(){ next.onclick(); },2000); } function stopAutoPlay(){ clearInterval(timer); } prev.onclick = function () { if(animateComplete){ animated(600); } }; next.onclick = function () { if(animateComplete){ animated(-600); } }; //按钮切换 for (var i = 0, length = buttons.length; i < length; i++) { buttons[i].onclick = function () { if (this.className === 'on') { return; } if(animateComplete){ var index = this.getAttribute('index'); var newLeft = index * (-600); if(parseInt(list.style.left) === -3000 && newLeft === -600){ animated(-600); }else if(parseInt(list.style.left) === -600 && newLeft === -3000){ animated(600); }else{ animated(newLeft-parseInt(list.style.left)); } } } } container.onmouseover = stopAutoPlay; container.onmouseout = autoPlay; autoPlay(); } </script></head><body><div id="container"> <div id="list" style="left: -600px"> <img src="img/5.jpg" alt="5"> <img src="img/1.jpg" alt="1"> <img src="img/2.jpg" alt="2"> <img src="img/3.jpg" alt="3"> <img src="img/4.jpg" alt="4"> <img src="img/5.jpg" alt="5"> <img src="img/1.jpg" alt="1"> </div> <div id="buttons"> <span index="1" class="on"></span> <span index="2"></span> <span index="3"></span> <span index="4"></span> <span index="5"></span> </div> <a href="javascript:;" id="prev" class="arrow"><</a> <a href="javascript:;" id="next" class="arrow">></a></div></body></html>代码二：
<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>焦点轮播图</title> <style type="text/css"> * { margin: 0; padding: 0; text-decoration: none; } body { padding: 20px; } #container { width: 600px; height: 400px; border: 3px solid #333; overflow: hidden; position: relative; } #list { width: 4200px; height: 400px; position: absolute; z-index: 1; } #list img { float: left; } #buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px; } #buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px; } #buttons .on { background: orangered; } .arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 180px; background-color: RGBA(0, 0, 0, .3); color: #fff; } .arrow:hover { background-color: RGBA(0, 0, 0, .7); } #container:hover .arrow { display: block; } #prev { left: 20px; } #next { right: 20px; } </style> <script type="text/javascript"> window.onload = function () { var container = document.getElementById('container'); var list = document.getElementById('list'); var buttons = document.getElementById('buttons').getElementsByTagName('span'); var prev = document.getElementById('prev'); var next = document.getElementById('next'); var index = 1; var len = 5; var animated = false; var interval = 3000; var timer; function animate(offset) { if (offset == 0) { return; } animated = true; var time = 300; var inteval = 10; var speed = offset / (time / inteval); var left = parseInt(list.style.left) + offset; var go = function () { if ((speed > 0 && parseInt(list.style.left) < left) || (speed < 0 && parseInt(list.style.left) > left)) { list.style.left = parseInt(list.style.left) + speed + 'px'; setTimeout(go, inteval); } else { list.style.left = left + 'px'; if (left > -200) { list.style.left = -600 * len + 'px'; } if (left < (-600 * len)) { list.style.left = '-600px'; } animated = false; } } go(); } function showButton() { for (var i = 0; i < buttons.length; i++) { if (buttons[i].className == 'on') { buttons[i].className = ''; break; } } buttons[index - 1].className = 'on'; } function play() { timer = setTimeout(function () { next.onclick(); play(); }, interval); } function stop() { clearTimeout(timer); } next.onclick = function () { if (animated) { return; } if (index == 5) { index = 1; } else { index += 1; } animate(-600); showButton(); } prev.onclick = function () { if (animated) { return; } if (index == 1) { index = 5; } else { index -= 1; } animate(600); showButton(); } for (var i = 0; i < buttons.length; i++) { buttons[i].onclick = function () { if (animated) { return; } if (this.className == 'on') { return; } var myIndex = parseInt(this.getAttribute('index')); var offset = -600 * (myIndex - index); animate(offset); index = myIndex; showButton(); } } container.onmouseover = stop; container.onmouseout = play; play(); } </script></head><body><div id="container"> <div id="list" style="left: -600px;"> <img src="img/5.jpg" alt="1"/> <img src="img/1.jpg" alt="1"/> <img src="img/2.jpg" alt="2"/> <img src="img/3.jpg" alt="3"/> <img src="img/4.jpg" alt="4"/> <img src="img/5.jpg" alt="5"/> <img src="img/1.jpg" alt="5"/> </div> <div id="buttons"> <span index="1" class="on"></span> <span index="2"></span> <span index="3"></span> <span index="4"></span> <span index="5"></span> </div> <a href="javascript:;" id="prev" class="arrow"><</a> <a href="javascript:;" id="next" class="arrow">></a></div></body></html>
