Background: The recent study CSS3, saw a small case, through their own learning, hands to achieve it, to share it out now.
Renderings
Implementation process
1. First we need to write a static watch the effect on the page. First, we need a dial div wrap its simple styling, with border-radius property to be arranged in a circle.
<div id="wrap"></div>
#wrap{width:200px; height:200px; border:2px solid #000; margin:100px auto;border- radius:50%; position:relative;}
2. Next we use ul li to write and dial in scale, its simple styling. Which should be noted is that we -webkit-transform-origin: center 100px ; to set up our rotation basis points. Then use -webkit-transform: rotate (0) ; Let li corresponding angle of rotation to form the corresponding scale.
<ul id="list">
<li></li> <!--刻度-->
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
#wrap ul{margin:0; padding:0; height:200px; position:relative; list-style:none;}
#wrap ul li{width:2px; height:6px; background:#000; position:absolute; left:99px; top: 0;-webkit-transform-origin:center 100px;}
#wrap ul li:nth-of-type(1){-webkit-transform: rotate(0);}
#wrap ul li:nth-of-type(2){-webkit-transform: rotate(6deg);}
#wrap ul li:nth-of-type(3){-webkit-transform: rotate(12deg);}
#wrap ul li:nth-of-type(4){-webkit-transform: rotate(18deg);}
#wrap ul li:nth-of-type(5){-webkit-transform: rotate(24deg);}
#wrap ul li:nth-of-type(6){-webkit-transform: rotate(30deg);}
#wrap ul li:nth-of-type(7){-webkit-transform: rotate(36deg);}
#wrap ul li:nth-of-type(8){-webkit-transform: rotate(42deg);}
#wrap ul li:nth-of-type(5n+1){ height:12px;}
3. We designed wherein css3 selector to the nth-of-type (), which provides several li element belonging to its parent element.
Of course, we can not have all the scale dial to set li style to complete. We need to use js to render behind it.
Before rendering, we need to write our second, minute, hour. Are div hour, min, sec, and we carry style setting. In order to beautify it, we write a div icon, dot. And its simple style settings.
<div id="hour"></div>
<div id="min"></div>
<div id="sec"></div>
<div class="icon"></div>
#hour{width:6px; height:45px; background:#000; position:absolute; left:97px; top:55px;-webkit-transform-origin:bottom ;}
#min{width:4px; height:65px; background:#999; position:absolute; left:98px; top:35px;-webkit-transform-origin:bottom ;}
#sec{width:2px; height:80px; background:red; position:absolute; left:99px; top:20px;-webkit-transform-origin:bottom ;}
.icon{width:20px; height:20px; background:#000; border-radius:50%; position:absolute; left:90px; top: 90px;}
4. Next we come to write about the watch moving up JavaScript, first with js to acquire each div.
var oList=document.getElementById("list");//获取到刻度
var oCss=document.getElementById("css");
var oHour=document.getElementById("hour");//获取时针
var oMin=document.getElementById("min");//获取分针
var oSec=document.getElementById("sec");//获取秒针
var oLi="";
var sCss="";
5. Next to exaggerate the scale of the dial.
for (var i=0;i<60;i++) { //一个表盘总共是60个刻度
sCss+="#wrap ul li:nth-of-type("+(i+1)+"){-webkit-transform: rotate("+i*6+"deg);}";
oLi+="<li></li>";
};
oList.innerHTML=oLi;
oCss.innerHTML+=sCss;//表盘刻度渲染完成
6. Next we watch hands to write a function of time according to changes, first use new Date () Gets the time, and then change the style of hands by going to allow hands to rotate based on time, 6 seconds one second corresponds to the rotation degrees, minutes 6 considerable degree rotation of one second, one second-clockwise rotation of 30 degrees corresponds.
function toTime(){
var oDate=new Date();//获取当前时间
var iSec=oDate.getSeconds();//获取当前秒
var iMin=oDate.getMinutes()+iSec/60;//获取当前分
var iHour=oDate.getHours()+iMin/60;//获取当前时
oSec.style.WebkitTransform="rotate("+iSec*6+"deg)";//秒针转动角度1秒6度 (表盘一圈360度一圈60秒所以一秒6度)
oMin.style.WebkitTransform="rotate("+iMin*6+"deg)";//分钟转动角度1分6度 (表盘一圈360度一圈60分所以一分6度)
oHour.style.WebkitTransform="rotate("+iHour*30+"deg)";//时针转动角度一小时30度(表盘一圈360度一圈12小时所以一小时30度)
};
7. Finally, we opened a timer, so that the function of one second once.
toTime();
setInterval(toTime,1000);
At this point a watch on the finished effect, the following is the full source code
Effect Source
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<title>钟表</title>
<style id="css">
#wrap{width:200px; height:200px; border:2px solid #000; margin:100px auto;border-radius:50%; position:relative;}
#wrap ul{margin:0; padding:0; height:200px; position:relative; list-style:none;}
#wrap ul li{width:2px; height:6px; background:#000; position:absolute; left:99px; top: 0;-webkit-transform-origin:center 100px;}
/*#wrap ul li:nth-of-type(1){-webkit-transform: rotate(0);}
#wrap ul li:nth-of-type(2){-webkit-transform: rotate(6deg);}
#wrap ul li:nth-of-type(3){-webkit-transform: rotate(12deg);}
#wrap ul li:nth-of-type(4){-webkit-transform: rotate(18deg);}
#wrap ul li:nth-of-type(5){-webkit-transform: rotate(24deg);}
#wrap ul li:nth-of-type(6){-webkit-transform: rotate(30deg);}
#wrap ul li:nth-of-type(7){-webkit-transform: rotate(36deg);}
#wrap ul li:nth-of-type(8){-webkit-transform: rotate(42deg);}*/
#wrap ul li:nth-of-type(5n+1){ height:12px;}
#hour{width:6px; height:45px; background:#000; position:absolute; left:97px; top:55px;-webkit-transform-origin:bottom ;}
#min{width:4px; height:65px; background:#999; position:absolute; left:98px; top:35px;-webkit-transform-origin:bottom ;}
#sec{width:2px; height:80px; background:red; position:absolute; left:99px; top:20px;-webkit-transform-origin:bottom ;}
.icon{width:20px; height:20px; background:#000; border-radius:50%; position:absolute; left:90px; top: 90px;}
</style>
</head>
<body>
<div id="wrap">
<ul id="list">
<!--<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>-->
</ul>
<div id="hour"></div>
<div id="min"></div>
<div id="sec"></div>
<div class="icon"></div>
</div>
<script>
var oList=document.getElementById("list");//获取到刻度
var oCss=document.getElementById("css");
var oHour=document.getElementById("hour");//获取时针
var oMin=document.getElementById("min");//获取分针
var oSec=document.getElementById("sec");//获取秒针
var oLi="";
var sCss="";
for (var i=0;i<60;i++) { //一个表盘总共是60个刻度
sCss+="#wrap ul li:nth-of-type("+(i+1)+"){-webkit-transform: rotate("+i*6+"deg);}";
oLi+="<li></li>";
};
oList.innerHTML=oLi;
oCss.innerHTML+=sCss;//表盘刻度渲染完成
toTime();
setInterval(toTime,1000);
function toTime(){
var oDate=new Date();//获取当前时间
var iSec=oDate.getSeconds();//获取当前秒
var iMin=oDate.getMinutes()+iSec/60;//获取当前分
var iHour=oDate.getHours()+iMin/60;//获取当前时
oSec.style.WebkitTransform="rotate("+iSec*6+"deg)";//秒针转动角度1秒6度 (表盘一圈360度一圈60秒所以一秒6度)
oMin.style.WebkitTransform="rotate("+iMin*6+"deg)";//分钟转动角度1分6度 (表盘一圈360度一圈60分所以一分6度)
oHour.style.WebkitTransform="rotate("+iHour*30+"deg)";//时针转动角度一小时30度(表盘一圈360度一圈12小时所以一小时30度)
};
</script>
</body>
</html>