标签：
<!DOCTYPE html>
<html charset="utf-8">
<head>
<title>时钟</title>
<style>
body{background:#42426F;}
#c1{background:white;}
span{color:white;}
</style>
<script>
window.onload = function(){
var oC = document.getElementById(‘c1‘);
var oGC = oC.getContext(‘2d‘);
function toDraw(){
var x = 200;
var y = 200;
var r = 150;
oGC.clearRect(0,0,oC.width,oC.height);
//获取时间
var oDate = new Date();
var oHours = oDate.getHours();
var oMin = oDate.getMinutes();
var oSen = oDate.getSeconds();
var oHoursValue = (-90 + oHours*30 + oMin/2) * Math.PI/180;
var oMinValue = (-90 + oMin*6) * Math.PI/180;
var oSenValue = (-90 + oSen*6) * Math.PI/180;
var osen2Value = oSenValue+Math.PI;
oGC.beginPath();
for(var i = 0; i < 60; i++){
oGC.moveTo(x,y);
oGC.arc(x,y,r,6*i*Math.PI/180,6*(i+1)*Math.PI/180,false);
}
oGC.closePath();
oGC.stroke();
oGC.fillStyle = ‘white‘;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*19/20,0,360*(i+1)*Math.PI/180,false);
oGC.closePath();
oGC.fill();
oGC.lineWidth=3;
oGC.beginPath();
for(var i = 0; i < 12; i++){
oGC.moveTo(x,y);
oGC.arc(x,y,r,30*i*Math.PI/180,30*(i+1)*Math.PI/180,false);
}
oGC.closePath();
oGC.stroke();
oGC.fillStyle = ‘white‘;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*18/20,0,360*(i+1)*Math.PI/180,false);
oGC.closePath();
oGC.fill();
//时针
oGC.lineWidth = 5;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*10/20,oHoursValue,oHoursValue,false);
oGC.closePath();
oGC.stroke();
//分针
oGC.lineWidth = 3;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*15/20,oMinValue,oMinValue,false);
oGC.closePath();
oGC.stroke();
//秒针
oGC.lineWidth = 1;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*17/20,oSenValue,oSenValue,false);
oGC.closePath();
oGC.stroke();
oGC.lineWidth = 1;
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*5/20,osen2Value,osen2Value,false);
oGC.closePath();
oGC.stroke();
oGC.beginPath();
oGC.moveTo(x,y);
oGC.arc(x,y,r*1/20,0,2*Math.PI,false);
oGC.fillStyle=‘black‘;
oGC.closePath();
oGC.fill();
}
setInterval(toDraw,1000);
toDraw();
};
</script>
</head>
<body>
<canvas id="c1" width="500" height="500">
<span>不支持canvas浏览器</span>
</canvas><!--默认宽300，高150-->
</body>
</html>
标签：
原文地址：http://www.cnblogs.com/huangf714/p/5907977.html
