代码写响应式时钟效果

Posted ChrissZhao

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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)
}

 

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