效果图:
图(1)
图(2)
代码如下:
代码如下 | 复制代码 |
*{margin:0; padding:0;} body{ background:#000; text-align:center;} canvas{ background:#fff;} function toDou(iNum){ return iNum<10?'0'+iNum:''+iNum; } function d2a(n){ return n*Math.PI/180; } window.onload=function(){ varoC=document.getElementById('c1'); vargd=oC.getContext('2d'); varcx=oC.width/2, cy=oC.height/2; function clock(){ gd.clearRect(0,0,oC.width,oC.height); varoDate=newDate(); varH=oDate.getHours()%12; varM=oDate.getMinutes(); varS=oDate.getSeconds(); varMS=oDate.getMilliseconds(); drawArc(60,0,(H*30+M/60*30),'orange'); drawArc(80,0,(M*6+S/60*6),'purple'); drawArc(100,0,(S*6+MS/1000*6),'aqua'); varstr=toDou(H)+':'+toDou(M)+':'+toDou(S); gd.font='20px 微软雅黑'; gd.textAlign='center'; gd.textBaseline='middle'; gd.fillText(str,cx,cy); } clock() setInterval(clock,1); function drawArc(r,s,e,color){ color= color||'black'; gd.beginPath(); gd.arc(cx,cy,r,d2a(s-90),d2a(e-90),false); gd.strokeStyle=color; gd.lineWidth=20; gd.stroke(); } }; |