Rumah > Artikel > hujung hadapan web > 使用HTML5和CSS3制作简单的钟表

使用HTML5和CSS3制作简单的钟表

巴扎黑asal: 2017-09-14 09:47:492697semak imbas

利用html5，css实现钟摆效果，在项目中经常会遇到，今天小编把基于HTML5+CSS3实现简单的时钟效果的实现代码分享到脚本之家平台，需要的额朋友参考下吧

目的：

利用html5，css实现钟摆效果

知识点：

1）利用position/left/top和calc()实现元素的水平和垂直居中；

2）利用CSS3的animation/transform/transform-origin属性定义动画；

3）利用transform-origin实现旋转原点的圆心调整

废话不多说了，直接看代码吧，具体代码如下所示：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        li{
            list-style:none;
        }
        #box{
            width: 400px;
            height: 400px;
            position: absolute;
            top:calc(50% - 200px);
            left:calc(50% - 200px);
            border: 2px solid palegoldenrod;
        }
        #dial{
            width: 200px;
            height: 200px;
            position: absolute;
            top:calc(50% - 100px);
            left:calc(50% - 100px);
            border: 2px solid cyan;
            border-radius: 50%;
        }   
        .scaleIndex{
            width: 4px;
            height: 12px;
            position: absolute;
            top: 0;
            left: calc(50% - 2px);
            background-color: gray;
            transform-origin: 2px 100px;
        }
        .angle30{transform : rotate(30deg);}
        .angle60{transform : rotate(60deg);}
        .angle90{transform : rotate(90deg);}
        .angle120{transform : rotate(120deg);}
        .angle150{transform : rotate(150deg);}
        .angle180{transform : rotate(180deg);}
        .angle210{transform : rotate(210deg);}
        .angle240{transform : rotate(240deg);}
        .angle270{transform : rotate(270deg);}
        .angle300{transform : rotate(300deg);}
        .angle330{transform : rotate(330deg);}
        #fixPoint{
            width: 10px;
            height: 10px;
            position: absolute;
            top:calc(50% - 5px);
            left:calc(50% - 5px);
            background-color: cadetblue;
            border-radius: 50%;
        }
        #hourHand{
            width: 6px;
            height: 70px;
            position:absolute;
            top: 40px;
            left: calc(50% - 3px);
            background-color: darkblue;
            transform-origin: 50% 60px;
        }
        #minuteHand{
            width: 4px;
            height: 75px;
            position:absolute;
            top: 35px;
            left: calc(50% - 2px);
            background-color: yellow;
            transform-origin: 50% 65px;
        }
        #secondHand{
            width: 2px;
            height: 90px;
            position:absolute;
            top: 20px;
            left: calc(50% - 1px);
            background-color: red;
            transform-origin: 50% 80px;
        }
    </style>
</head>
<body>
    <p id = "box">
            <p id = &#39;dial&#39;>
                <ul id = "scale">
                    <li class = "scaleIndex"></li>
                    <li class = "scaleIndex angle30"></li>
                    <li class = "scaleIndex angle60"></li>
                    <li class = "scaleIndex angle90"></li>
                    <li class = "scaleIndex angle120"></li>
                    <li class = "scaleIndex angle150"></li>
                    <li class = "scaleIndex angle180"></li>
                    <li class = "scaleIndex angle210"></li>
                    <li class = "scaleIndex angle240"></li>
                    <li class = "scaleIndex angle270"></li>
                    <li class = "scaleIndex angle300"></li>
                    <li class = "scaleIndex angle330"></li>
                </ul>
                <p id = "fixPoint"></p>
                <p id = "hourHand"></p>
                <p id = "minuteHand"></p>
                <p id = "secondHand"></p>
            </p>
        </p>
<script type = &#39;text/javascript&#39; src = &#39;js/jquery-3.2.1.js&#39;></script>
<script type = "text/javascript">
window.onload = function(){
            var hourHand = document.getElementById(&#39;hourHand&#39;);
            var minuteHand = document.getElementById(&#39;minuteHand&#39;);
            var secondHand = document.getElementById(&#39;secondHand&#39;);
setInterval(function(){
                    var currentTime = new Date();
                    var hourValue = currentTime.getHours();
                    var hourAngle = hourValue / 24 * 360 + &#39;deg&#39;;
                    var minuteValue = currentTime.getMinutes();
                    var minuteAngle = minuteValue / 60 * 360 + &#39;deg&#39;;
                    var secondValue = currentTime.getSeconds();
                    var secondAngle = secondValue / 60 * 360 + &#39;deg&#39;;
                    console.log(hourAngle);
// 方法一：利用jquery的css()增加属性
var cmdHour = &#39;rotate(&#39;+ hourAngle +&#39;)&#39;;
$(&#39;#hourHand&#39;).css({transform:&#39;rotate(&#39;+ hourAngle +&#39;)&#39;});
var cmdMinute = &#39;rotate(&#39;+ minuteAngle +&#39;)&#39;;
$(&#39;#minuteHand&#39;).css({transform:cmdMinute});
var cmdSecond = &#39;rotate(&#39;+ secondAngle +&#39;)&#39;;
$(&#39;#secondHand&#39;).css({transform:cmdSecond});

// 方法二：利用DOM元素的style属性设置
//      hourHand.style.transform = &#39;rotate(&#39;+ hourAngle + &#39;)&#39;;
//      minuteHand.style.transform = &#39;rotate(&#39;+ minuteAngle + &#39;)&#39;;
//      secondHand.style.transform = &#39;rotate(&#39;+ secondAngle + &#39;)&#39;;  

},1000);
}
    </script>
</body>
</html>

Atas ialah kandungan terperinci 使用HTML5和CSS3制作简单的钟表. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!

Kenyataan：

Kandungan artikel ini disumbangkan secara sukarela oleh netizen, dan hak cipta adalah milik pengarang asal. Laman web ini tidak memikul tanggungjawab undang-undang yang sepadan. Jika anda menemui sebarang kandungan yang disyaki plagiarisme atau pelanggaran, sila hubungi admin@php.cn

Artikel sebelumnya：html5使用canvas制作弹幕功能实例讲解Artikel seterusnya：H5中如何获取和设置自定义属性

Artikel berkaitan

Lihat lagi