首页 > 代码库 > HTML5动画（一）：实现树叶飘落
HTML5动画（一）：实现树叶飘落
实现如图所示的东西效果（落叶下落）：
html代码：
<!DOCTYPE html><html><head> <title>HTML5树叶飘落动画</title> <meta charset="utf-8"> <meta name="viewport" content="width=500px, initial-scale=0.64"> <link rel="stylesheet" href="leaves.css" type="text/css"> <script src="leaves.js" type="text/javascript"></script></head><body> <div id="container"> <div id="leafContainer"></div> <div id="message"> <em>这是基于webkit的落叶动画</em> </div> </div> </body></html>
css代码：
body{ background-color: #4E4226;}#container { position: relative; height: 700px; width: 500px; margin: 10px auto; overflow: hidden; border: 4px solid #5C090A; background: #4E4226 url(‘images/backgroundLeaves.jpg‘) no-repeat top left;}#leafContainer { position: absolute; width: 100%; height: 100%;}#message{ position: absolute; top: 160px; width: 100%; height: 300px; background:transparent url(‘images/textBackground.png‘) repeat-x center; color: #5C090A; font-size: 220%; font-family: ‘Georgia‘; text-align: center; padding: 20px 10px; -webkit-box-sizing: border-box; -webkit-background-size: 100% 100%; z-index: 1;}em { font-weight: bold; font-style: normal;}#leafContainer > div { position: absolute; width: 100px; height: 100px; -webkit-animation-iteration-count: infinite; -webkit-animation-direction: normal; -webkit-animation-timing-function: linear;}#leafContainer > div > img { position: absolute; width: 100px; height: 100px; -webkit-animation-iteration-count: infinite; -webkit-animation-direction: alternate; -webkit-animation-timing-function: ease-in-out; -webkit-transform-origin: 50% -100%;}@-webkit-keyframes fade{ 0% { opacity: 1; } 95% { opacity: 1; } 100% { opacity: 0; }}@-webkit-keyframes drop{ 0% { -webkit-transform: translate(0px, -50px); } 100% { -webkit-transform: translate(0px, 650px); }}@-webkit-keyframes clockwiseSpin{ 0% { -webkit-transform: rotate(-50deg); } 100% { -webkit-transform: rotate(50deg); }}@-webkit-keyframes counterclockwiseSpinAndFlip { 0% { -webkit-transform: scale(-1, 1) rotate(50deg); } 100% { -webkit-transform: scale(-1, 1) rotate(-50deg); }}
js代码：
const NUMBER_OF_LEAVES = 30;function init(){ var container = document.getElementById(‘leafContainer‘); for (var i = 0; i < NUMBER_OF_LEAVES; i++) { container.appendChild(createALeaf()); }}function randomInteger(low, high){ return low + Math.floor(Math.random() * (high - low));}function randomFloat(low, high){ return low + Math.random() * (high - low);}function pixelValue(value){ return value + ‘px‘;}function durationValue(value){ return value + ‘s‘;}function createALeaf(){ var leafDiv = document.createElement(‘div‘); leafDiv.style.top = "-100px"; leafDiv.style.left = pixelValue(randomInteger(0, 500)); leafDiv.style.webkitAnimationName = ‘fade, drop‘; var fadeAndDropDuration = durationValue(randomFloat(5, 11)); leafDiv.style.webkitAnimationDuration = fadeAndDropDuration + ‘, ‘ + fadeAndDropDuration; var leafDelay = durationValue(randomFloat(0, 5)); leafDiv.style.webkitAnimationDelay = leafDelay + ‘, ‘ + leafDelay; var image = document.createElement(‘img‘); image.src = ‘images/realLeaf‘ + randomInteger(1, 5) + ‘.png‘; var spinAnimationName = (Math.random() < 0.5) ? ‘clockwiseSpin‘ : ‘counterclockwiseSpinAndFlip‘; image.style.webkitAnimationName = spinAnimationName; var spinDuration = durationValue(randomFloat(4, 8)); image.style.webkitAnimationDuration = spinDuration; leafDiv.appendChild(image); return leafDiv;}window.addEventListener(‘load‘, init, false);
转载地址：http://www.html5tricks.com/css3-fall-leaves.html
HTML5动画（一）：实现树叶飘落
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。