根据HTML5+CSS3完成简易的数字时钟实际效果

2021-02-23 21:12 jianzhan

目地:

运用html5,css完成钟摆实际效果

专业知识点:

1) 运用position/left/top和calc()完成元素的水平静竖直垂直居中;

2) 运用CSS3的animation/transform/transform-origin特性界定动漫;

3) 运用transform-origin完成转动原点的圆心调剂

空话很少说了,立即看编码吧,实际编码以下所示:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF⑻">
    <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/jquery⑶.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);
// 方式1:运用jquery的css()提升特性
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});

// 方式2:运用DOM元素的style特性设定
//      hourHand.style.transform = 'rotate('+ hourAngle + ')';
//      minuteHand.style.transform = 'rotate('+ minuteAngle + ')';
//      secondHand.style.transform = 'rotate('+ secondAngle + ')';  

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

总结

以上所述是网编给大伙儿详细介绍的根据HTML5+CSS3完成简易的数字时钟实际效果,期待对大伙儿有一定的协助,假如大伙儿有任何疑惑请给我留言,网编会立即回应大伙儿的。在此也十分谢谢大伙儿对脚本制作之家网站的适用!