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基于HTML5+CSS3实现简单的时钟效果

程序员文章站 2023-11-20 17:09:10
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... 17-09-11...

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>
    <div id = "box">
            <div id = 'dial'>
                <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>
                <div id = "fixpoint"></div>
                <div id = "hourhand"></div>
                <div id = "minutehand"></div>
                <div id = "secondhand"></div>
            </div>
        </div>
<script type = 'text/javascript' src = 'js/jquery-3.2.1.js'></script>
<script type = "text/javascript">
window.onload = function(){
            var hourhand = document.getelementbyid('hourhand');
            var minutehand = document.getelementbyid('minutehand');
            var secondhand = document.getelementbyid('secondhand');
setinterval(function(){
                    var currenttime = new date();
                    var hourvalue = currenttime.gethours();
                    var hourangle = hourvalue / 24 * 360 + 'deg';
                    var minutevalue = currenttime.getminutes();
                    var minuteangle = minutevalue / 60 * 360 + 'deg';
                    var secondvalue = currenttime.getseconds();
                    var secondangle = secondvalue / 60 * 360 + 'deg';
                    console.log(hourangle);
// 方法一:利用jquery的css()增加属性
var cmdhour = 'rotate('+ hourangle +')';
$('#hourhand').css({transform:'rotate('+ hourangle +')'});
var cmdminute = 'rotate('+ minuteangle +')';
$('#minutehand').css({transform:cmdminute});
var cmdsecond = 'rotate('+ secondangle +')';
$('#secondhand').css({transform:cmdsecond});

// 方法二:利用dom元素的style属性设置
//      hourhand.style.transform = 'rotate('+ hourangle + ')';
//      minutehand.style.transform = 'rotate('+ minuteangle + ')';
//      secondhand.style.transform = 'rotate('+ secondangle + ')';  

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

总结

以上所述是小编给大家介绍的基于html5+css3实现简单的时钟效果,希望对大家有所帮助