今天分享使用html+css3+少量jquery实现鼠标移入移出图片生成随机动画,我们先看最终效果图(截图为静态效果,做出来可是动态的哟)
左右旋转
上下移动
缩放
由于时间关系我就不一步步解析各段代码所代表含义,我这里就给出一些思路及关键代码:
1、首先使用ul li展现4张图片
本示例中不仅使用了图片,在图片表面还放置了一段“WEB”字样文字,用于与图片实现隐藏或显示效果,故html中每张图片上方加入:
<div class="mytext">WEB</div>
2、CSS控制图片及文字透明度
本示例中一组图片与文字同时放在一个li里面,高度与宽度设置与li一样大,并使用绝对定位固定它们的位置:
#myimg ul li a div {position: absolute;top: 0;left: 0;width: 100%;height: 100%;text-align: center;font-size: 40px;}
默认将隐藏图片,只显示文字,鼠标放入li时显示图片,这里使用opacity透明度属性控制:
#myimg ul li a div.pic {opacity: 0;}#myimg ul li:hover a div.pic {opacity: 1;}
3、CSS3自定义动画
本示例中用css3定义了3种动画:
@keyframes rot /*自定义 旋转动画*/ { 0% 20% 40% 60% 80% 100% { transform-origin: top center; } 0% { transform: rotate(0deg) } 20% { transform: rotate(-20deg) } 40% { transform: rotate(15deg) } 60% { transform: rotate(-10deg) } 80% { transform: rotate(5deg) } 100% { transform: rotate(0deg) } } @keyframes top /*自定义 上下动画*/ { 0% { top: 0 } 20% { top: 20px } 40% { top: -15px } 60% { top: 10px } 80% { top: -5px } 100% { top: 0px } } @keyframes sca /*自定义 缩放动画*/ { 0% { transform: scale(1) } 20% { transform: scale(1.1) } 40% { transform: scale(0.9) } 60% { transform: scale(1.05) } 80% { transform: scale(0.95) } 100% { transform: scale(1) } }
使用css执行上述自定义动画:
#myimg ul li.rot {animation: rot 1s;}#myimg ul li.top {animation: top 1s;}#myimg ul li.sca {animation: sca 1s;}
4、Jquery生成随机动画
当鼠标移入ul li时,使用jquery随机产生上述3种自定义动画,这里使用hover事件
HTML代码如下:
CSS代码如下:
<style type="text/css"> * { padding: 0; margin: 0; } #myimg { width: 800px; margin: 20px auto; } #myimg ul li { list-style-type: none; position: relative; float: left; width: 350px; height: 200px; line-height: 200px; margin: 20px; } #myimg ul li.rot { animation: rot 1s; } #myimg ul li.top { animation: top 1s; } #myimg ul li.sca { animation: sca 1s; } #myimg ul li:hover a div.pic { opacity: 1; } #myimg ul li a { text-decoration: none; color: white; } #myimg ul li a div { position: absolute; top: 0; left: 0; width: 100%; height: 100%; text-align: center; font-size: 40px; } #myimg ul li a div.pic { opacity: 0; } #myimg ul li:nth-child(1) a div.mytext { background: black; } #myimg ul li:nth-child(2) a div.mytext { background: blue; } #myimg ul li:nth-child(3) a div.mytext { background: darkred; } #myimg ul li:nth-child(4) a div.mytext { background: orange; } @keyframes rot /*自定义 旋转动画*/ { 0% 20% 40% 60% 80% 100% { transform-origin: top center; } 0% { transform: rotate(0deg) } 20% { transform: rotate(-20deg) } 40% { transform: rotate(15deg) } 60% { transform: rotate(-10deg) } 80% { transform: rotate(5deg) } 100% { transform: rotate(0deg) } } @keyframes top /*自定义 上下动画*/ { 0% { top: 0 } 20% { top: 20px } 40% { top: -15px } 60% { top: 10px } 80% { top: -5px } 100% { top: 0px } } @keyframes sca /*自定义 缩放动画*/ { 0% { transform: scale(1) } 20% { transform: scale(1.1) } 40% { transform: scale(0.9) } 60% { transform: scale(1.05) } 80% { transform: scale(0.95) } 100% { transform: scale(1) } } </style>
Jquery代码如下:
<script type="text/javascript"> $(function() { var anim = ['rot', 'top', 'sca']; var a, b; $("#myimg ul li").hover(function() { //向下取0-2整数 a = anim[Math.floor(Math.random() * 3)]; while (b == a) { a = anim[Math.floor(Math.random() * 3)]; } $(this).addClass(a); b = a; }, function() { $(this).removeClass(a); }) }); </script>
注意事项:需要引入jquery文件,可以自行选择jquery版本
好了,今天分享就到这里,以后还有更多哟,请大家一起来交流下

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The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.

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