canvas仿iwatch时钟效果
程序员文章站
2023-11-20 12:20:22
效果图:
图(1)
图(2)
代码如下:
&...
效果图:
图(1)
图(2)
代码如下:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>title</title> <style> *{margin:0; padding:0;} body{ background:#000; text-align:center;} canvas{ background:#fff;} </style> <script> function todou(inum){ return inum<10?'0'+inum:''+inum; } function d2a(n){ return n*math.pi/180; } window.onload = function(){ var oc = document.getelementbyid('c1'); var gd = oc.getcontext('2d'); var cx = oc.width/2, cy = oc.height/2; function clock(){ gd.clearrect(0,0,oc.width,oc.height); var odate = new date(); var h = odate.gethours()%12; var m = odate.getminutes(); var s = odate.getseconds(); var ms = 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'); var str = 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(); } }; </script> </head> <body> <canvas id="c1" width="800" height="600"></canvas> </body> </html>
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