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HTML代码HTML的代码非常简单,只要为进度条提供一个容器就可以了。基本的HTML代码如下:
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/pmsj/)div class="wrapper" div class="load-bar"div class="load-bar-inner" data-loading="0" span id="counter"/span /div /div h1Loading/h1 pPlease wait...(By:a href="http://www.jiawin.com"www.jiawin.com/a)/p/divCSS样式表
接下来是为我们的进度条定义样式,这里主要运用了CSS3的linear-gradient的渐变属性、border-radius的圆角属性、box-shadow的阴影属性等等,来制作出进度条的初步模型。完成进度条的模型后我们利用animation属性,让进度条开始动起来,就其中的进度条动画设置代码如下:
.load-bar-inner {height: 99%;width: 0%;border-radius: inherit;position: relative;background: #c2d7ac;background: linear-gradient(#e0f6c8, #98ad84);box-shadow: inset 0 1px 0 rgba(255, 255, 255, 1), 0 1px 5px rgba(0, 0, 0, 0.3), 0 4px 5px rgba(0, 0, 0, 0.3);animation: loader 10s linear infinite;}
如果接触了CSS3的朋友,相信大多数人对这个属性都比较熟悉了,在这里大概的说明一下animation设置的参数:
设置对象所应用的动画名称:loader设置对象动画的持续时间:10s设置对象动画的过渡类型:linear (线性过渡,等同于贝塞尔曲线)设置对象动画的循环次数:infinite (无限循环)@keyframes loader
这个标签属性是用来被animation使用的,定义动画时,简单的动画可以直接使用关键字from
和to
,即从一种状态过渡到另一种状态:
@keyframes loader { from {width: 0%;}to {width: 100%;}}
下面是完整的CSS代码,大家可以多研究下,也可以自己修改其中的代码,看看是否制作出更加有趣的东西来:
* {box-sizing: border-box;}html {height: 100%;}body {background: #efeeea;background: linear-gradient(#f9f9f9, #cecbc4);background: -moz-linear-gradient(#f9f9f9, #cecbc4);background: -webkit-linear-gradient(#f9f9f9, #cecbc4);background: -o-linear-gradient(#f9f9f9, #cecbc4);color: #757575;font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;text-align: center;}h1, p {padding:0; margin:0;}.wrapper {width: 350px;margin: 200px auto;}.wrapper p a {color:#757575; text-decoration:none;}.wrapper .load-bar {width: 100%;height: 25px;border-radius: 30px;background: #dcdbd7;position: relative;box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8), inset 0 2px 3px rgba(0, 0, 0, 0.2);}.wrapper .load-bar:hover .load-bar-inner, .wrapper .load-bar:hover #counter {animation-play-state: paused;-moz-animation-play-state: paused;-o-animation-play-state: paused;-webkit-animation-play-state: paused;}.wrapper .load-bar-inner {height: 99%;width: 0%;border-radius: inherit;position: relative;background: #c2d7ac;background: linear-gradient(#e0f6c8, #98ad84);background: -moz-linear-gradient(#e0f6c8, #98ad84);background: -webkit-linear-gradient(#e0f6c8, #98ad84);background: -o-linear-gradient(#e0f6c8, #98ad84);box-shadow: inset 0 1px 0 rgba(255, 255, 255, 1), 0 1px 5px rgba(0, 0, 0, 0.3), 0 4px 5px rgba(0, 0, 0, 0.3);animation: loader 10s linear infinite;-moz-animation: loader 10s linear infinite;-webkit-animation: loader 10s linear infinite;-o-animation: loader 10s linear infinite;}.wrapper #counter {position: absolute;background: #eeeff3;background: linear-gradient(#eeeff3, #cbcbd3);background: -moz-linear-gradient(#eeeff3, #cbcbd3);background: -webkit-linear-gradient(#eeeff3, #cbcbd3);background: -o-linear-gradient(#eeeff3, #cbcbd3);padding: 5px 10px;border-radius: 0.4em;box-shadow: inset 0 1px 0 rgba(255, 255, 255, 1), 0 2px 4px 1px rgba(0, 0, 0, 0.2), 0 1px 3px 1px rgba(0, 0, 0, 0.1);left: -25px;top: -50px;font-size: 12px;font-weight: bold;width: 44px;animation: counter 10s linear infinite;-moz-animation: counter 10s linear infinite;-webkit-animation: counter 10s linear infinite;-o-animation: counter 10s linear infinite;}.wrapper #counter:after {content: "";position: absolute;width: 8px;height: 8px;background: #cbcbd3;transform: rotate(45deg);-moz-transform: rotate(45deg);-webkit-transform: rotate(45deg);-o-transform: rotate(45deg);left: 50%;margin-left: -4px;bottom: -4px;box-shadow: 3px 3px 4px rgba(0, 0, 0, 0.2), 1px 1px 1px 1px rgba(0, 0, 0, 0.1);border-radius: 0 0 3px 0;}.wrapper h1 {font-size: 28px;padding: 20px 0 8px 0;}.wrapper p {font-size: 13px;} @keyframes loader { from {width: 0%;}to {width: 100%;}} @-moz-keyframes loader { from {width: 0%;}to {width: 100%;}} @-webkit-keyframes loader { from {width: 0%;}to {width: 100%;}} @-o-keyframes loader { from {width: 0%;}to {width: 100%;}} @keyframes counter { from {left: -25px;}to {left: 323px;}} @-moz-keyframes counter { from {left: -25px;}to {left: 323px;}} @-webkit-keyframes counter { from {left: -25px;}to {left: 323px;}} @-o-keyframes counter { from {left: -25px;}to {left: 323px;}}
在这里其实有很多个CSS3的知识点,例如进度条上面的进度提示的小图标的下方有个小三角形,这个小三角主要是通过制作一个小的正方形,然后利用position来定位,调整好位置后,再通过transform来转换角度,使之最终成为一个三角形。大家可以多多看看里面的一些小细节,对于学习CSS3来说是很有帮助的。
Javascript完成了进度条的模型,而且进度条也通过CSS3的定义开始动起来了,那我们就接下来用jQuery来完善我们的进度条,让他成为一个不管外表还是内心都很强大的进度条。嘿嘿在这里主要做的是让进度条上面的数字随着进度而发生变化,从而客观的知道当前进度条的进度百分比,看下面的代码:
$(function(){ var interval = setInterval(increment,100); var current = 0; function increment(){current++;$('#counter').html(current+'%'); if(current == 100) { current = 0; } } $('.load-bar').mouseover(function(){clearInterval(interval); }).mouseout(function(){ interval = setInterval(increment,100); });});
这一步需要注意的是别忘了加入jQuery库,不然就看不到效果了。