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This time I will bring you H5+C3 to achieve the clock effect. What are the precautions for H5+C3 to achieve the clock effect? The following is a practical case, let’s take a look.
Purpose:
Use html5 and css to achieve the pendulum effectKnowledge points:
1) Use position/left/top and calc() to achieve horizontal and vertical centering of elements; 2) Use CSS3 animation/transform/transform-origin attribute definition Animation; 3) Use transform-origin to adjust the center of the rotation origin No more nonsense, let’s look at the code directly. The specific code is as follows:<!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 = '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>
<p id = "fixPoint"></p>
<p id = "hourHand"></p>
<p id = "minuteHand"></p>
<p id = "secondHand"></p>
</p>
</p>
<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> I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website! Recommended reading:
H5 implements scalable clock animation
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