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代码写响应式时钟效果
只需3个文件，就可以实现钟表效果，还是先看图再来看代码效果
时间是用的北京时间
再来看它的源代
html文件
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>时钟</title><link rel="stylesheet" href="css/style.css" media="screen" type="text/css" /></head><body><div class="fill"> <div class="reference"></div> <div class="clock" id="utility-clock"> <div class="centre"> <div class="dynamic"></div> <div class="expand round circle-1"></div> <div class="anchor hour"> <div class="element thin-hand"></div> <div class="element fat-hand"></div> </div> <div class="anchor minute"> <div class="element thin-hand"></div> <div class="element fat-hand minute-hand"></div> </div> <div class="anchor second"> <div class="element second-hand"></div> </div> <div class="expand round circle-2"></div> <div class="expand round circle-3"></div> </div> </div></div><script type="text/javascript" src="js/script.js"></script></body></html>
css文件
body { background: black;}.clock { position: absolute; opacity: 1;}.fill .clock { left: 50%; top: 50%;}.centre { position: absolute; top: 50%; left: 50%; width: 0; height: 0;}.expand { position: absolute; top: 0; left: 0; transform: translate(-50%, -50%);}.anchor { position: absolute; top: 0; left: 0; width: 0; height: 0;}.element { position: absolute; top: 0; left: 0;}.round { border-radius: 296px;}.circle-1 { background: white; width: 12px; height: 12px;}.circle-2 { background: #FA9F22; width: 8px; height: 8px;}.circle-3 { background: black; width: 4px; height: 4px;}.second { transform: rotate(180deg);}.minute { transform: rotate(54deg);}.second-hand { width: 2px; height: 164px; background: #FA9F22; transform: translate(-50%,-100%) translateY(24px);}.hour { transform: rotate(304.5deg);}.thin-hand { width: 4px; height: 50px; background: white; transform: translate(-50%,-100%);}.fat-hand { width: 10px; height: 57px; border-radius: 10px; background: white; transform: translate(-50%,-100%) translateY(-18px);}.minute-hand { height: 112px;}.hour-text { position: absolute; font: 40px Hei, Helvetica, Arial, sans-serif; color: white; transform: translate(-50%,-50%);}.hour-10 { padding-left: 0.4ex;}.hour-11 { padding-left: 0.25ex;}.minute-text { position: absolute; font: 12px Avenir Next, Helvetica, Arial, sans-serif; color: white; transform: translate(-50%,-50%);}.minute-line { background: white; width: 1px; height: 9px; transform: translate(-50%,-100%) translateY(-131px); opacity: 0.34;}
js文件
var clock = document.querySelector(‘#utility-clock‘)utilityClock(clock)if (clock.parentNode.classList.contains(‘fill‘)) autoResize(clock, 295 + 32)function utilityClock(container) { var dynamic = container.querySelector(‘.dynamic‘) var hourElement = container.querySelector(‘.hour‘) var minuteElement = container.querySelector(‘.minute‘) var secondElement = container.querySelector(‘.second‘) var minute = function(n) { return n % 5 == 0 ? minuteText(n) : minuteLine(n) } var minuteText = function(n) { var element = document.createElement(‘div‘) element.className = ‘minute-text‘ element.innerHTML = (n < 10 ? ‘0‘ : ‘‘) + n position(element, n / 60, 135) dynamic.appendChild(element) } var minuteLine = function(n) { var anchor = document.createElement(‘div‘) anchor.className = ‘anchor‘ var element = document.createElement(‘div‘) element.className = ‘element minute-line‘ rotate(anchor, n) anchor.appendChild(element) dynamic.appendChild(anchor) } var hour = function(n) { var element = document.createElement(‘div‘) element.className = ‘hour-text hour-‘ + n element.innerHTML = n position(element, n / 12, 105) dynamic.appendChild(element) } var position = function(element, phase, r) { var theta = phase * 2 * Math.PI element.style.top = (-r * Math.cos(theta)).toFixed(1) + ‘px‘ element.style.left = (r * Math.sin(theta)).toFixed(1) + ‘px‘ } var rotate = function(element, second) { element.style.transform = element.style.webkitTransform = ‘rotate(‘ + (second * 6) + ‘deg)‘ } var animate = function() { var now = new Date() var time = now.getHours() * 3600 + now.getMinutes() * 60 + now.getSeconds() * 1 + now.getMilliseconds() / 1000 rotate(secondElement, time) rotate(minuteElement, time / 60) rotate(hourElement, time / 60 / 12) requestAnimationFrame(animate) } for (var i = 1; i <= 60; i ++) minute(i) for (var i = 1; i <= 12; i ++) hour(i) animate()}function autoResize(element, nativeSize) { var update = function() { var scale = Math.min(window.innerWidth, window.innerHeight) / nativeSize element.style.transform = element.style.webkitTransform = ‘scale(‘ + scale.toFixed(3) + ‘)‘ } update() window.addEventListener(‘resize‘, update)}
还是写的时候注意路径，这样效果就会出来了
代码写响应式时钟效果
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