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JavaScript Canvas編寫炫彩的網(wǎng)頁(yè)時(shí)鐘

更新時(shí)間：2019年10月16日 08:32:08 作者：進(jìn)階的JFarmer

這篇文章主要為大家詳細(xì)介紹了JavaScript Canvas編寫炫彩的網(wǎng)頁(yè)時(shí)鐘，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了JavaScript Canvas編寫炫彩網(wǎng)頁(yè)時(shí)鐘的具體代碼，供大家參考，具體內(nèi)容如下

只是利用了Canvas制作的。

示意圖如下：

<!DOCTYPE html>
<html>
<head>
 <meta http-equiv = "Content-Type" content = "text/html"; charsert = "utf-8" />
 <title> 網(wǎng)頁(yè)時(shí)鐘 </title>
</head>
<body>
 <h2> Web時(shí)鐘 </h2>
 <canvas id = "hello" width = "400" height = "400"
 style = "border:1px solid black"> </canvas>
 <script languagetype = "text/javascript">
 var myCavas = document.getElementById('hello');
 var c = myCavas.getContext('2d');
 function clock() {
  c.clearRect(0, 0, 400, 400);
  //獲取當(dāng)前時(shí)間
  var data = new Date();
  //獲取秒
  var sec = data.getSeconds();
  //獲取分鐘
  var min = data.getMinutes();
  //獲取小時(shí)
  var hour = data.getHours();
  c.save();
  c.translate(200, 200);
  c.rotate(-Math.PI/2);
  //分針刻度線
  for (var i = 0; i < 60; i++) { //畫60個(gè)刻度線
  c.beginPath();
  c.strokeStyle = "yellowgreen";
  c.lineWidth = 5;
  c.moveTo(117, 0);
  c.lineTo(120, 0);
  c.stroke();
  //每6deg畫一個(gè)分鐘刻度線
  c.rotate(Math.PI/30);
  c.closePath();
  }
  //時(shí)鐘刻度線
  for (var i = 0; i < 12; i++) { //畫60個(gè)刻度線
  c.beginPath();
  c.strokeStyle = "green";
  c.lineWidth = 8;
  c.moveTo(100, 0);
  c.lineTo(120, 0);
  c.stroke();
  //每6deg畫一個(gè)分鐘刻度線
  c.rotate(Math.PI/6);
  c.closePath();
  }
  //外表盤
  c.beginPath();
  c.strokeStyle = "pink";
  c.arc(0, 0, 145, 0, Math.PI*2);
  c.lineWidth = 12;
  c.stroke();
  c.closePath();
  //畫時(shí)針
  hour = hour > 12 ? hour-12 : hour;
  //console.log(hour);
  c.beginPath();
  c.save();
  //設(shè)置旋轉(zhuǎn)角度，參數(shù)是弧度，角度0-360 弧度角度*Math.PI/180
  c.rotate(Math.PI/6*hour + Math.PI/6*min/60 + Math.PI/6*sec/3600);
  c.strokeStyle = "yellowgreen";
  c.lineWidth = 4;
  c.moveTo(-20, 0);
  c.lineTo(50, 0);
  c.stroke();
  c.restore();
  c.closePath();
  //畫分針
  //console.log(min);
  c.beginPath();
  c.save();
  c.rotate(Math.PI/30*min + Math.PI/30*sec/60);
  c.strokeStyle = "springgreen";
  c.lineWidth = 3;
  c.moveTo(-30, 0);
  c.lineTo(70, 0);
  c.stroke();
  c.restore();
  c.closePath();
  //畫秒針
  c.beginPath();
  c.save();
  c.rotate(Math.PI/30*sec);
  c.strokeStyle = "red";
  c.lineWidth = 2;
  c.moveTo(-40, 0);
  c.lineTo(120, 0);
  c.stroke();
  c.restore();
  c.closePath();
  c.restore();
 }
 clock();
 setInterval(clock, 1000);
 </script>
</body>
</html>

更多JavaScript時(shí)鐘特效點(diǎn)擊查看：JavaScript時(shí)鐘特效專題

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