复制代码代码如下:
<!DOCTYPE html>
<html>
<head>
<title>html5时钟</title>
</head>
<body>
<canvas id = "canvas"></canvas></p>
<p> <script>
var Clock = function (canvas, options) {
this.canvas = canvas;
this.ctx = this.canvas.getContext("2d");
this.options = options;
};</p>
<p> Clock.prototype = {
constructor: Clock,
drawCircle: function () {
var ctx = this.ctx;
ctx.strokeStyle = "black";
ctx.arc(this.canvas.width / 2, this.canvas.height / 2, 50, 0, 2 * Math.PI, false);
ctx.stroke();
},
drawNum: function () {
var ctx = this.ctx;
var angle = Math.PI * 2 / 12;
for (var i = 1; i <= 12; i += 1) {
ctx.font = "20px Georgia";
ctx.textAlign = "center";
ctx.textBaseline = 'middle';
ctx.fillText(String(i), this.canvas.width / 2 + Math.cos(3 *Math.PI / 2 + angle * i) * 40, this.canvas.height / 2 + Math.sin(3 * Math.PI / 2 + angle * i) * 40);
}
},
drawPointer: function () {
var ctx = this.ctx;
var that = this;
var date, hour, minute, second;
date = new Date();
hour = date.getHours();
if (hour > 12) {
hour = hour % 12;
}
minute = date.getMinutes();
second = date.getSeconds();</p>
<p> var b = minute * Math.PI / 30;
var c = second * Math.PI / 30;
var a = hour * Math.PI / 6 + Math.PI / 6 * minute / 60;
var minuteAngle = Math.PI * 2 / 3600;
var secondAngle = Math.PI * 2 / 60;
var hourAngle = Math.PI * 2 / 12 / 3600;</p>
<p> ctx.beginPath();
ctx.save();
ctx.translate(that.canvas.width / 2, that.canvas.height / 2);
ctx.arc(0, 0, 3, 0, 2 * Math.PI, false);
ctx.fill();
ctx.closePath();
ctx.beginPath();
a += hourAngle;
ctx.rotate(a);
ctx.fillRect(-2, -22, 4, 30);
ctx.closePath();
ctx.beginPath();
b += minuteAngle;
ctx.rotate(b - a);
ctx.fillRect(-1.5, -26, 3, 35);
ctx.closePath();
ctx.beginPath();
c += secondAngle;
ctx.rotate(c - b);
ctx.fillRect(-1, -30, 2, 40);
ctx.closePath();
ctx.restore();
},
rePaint: function () {
this.drawPointer();
this.drawCircle();
this.drawNum();
},
tik: function () {
var that = this;
var ctx = this.ctx;
this.rePaint();
window.timer = setInterval(function () {
ctx.clearRect(0, 0, that.canvas.width, that.canvas.height);
that.rePaint();
}, 1000);
}
};</p>
<p> var options;
var clock = new Clock(document.getElementById("canvas"), options);
clock.tik();
</script>
</body>
</html>
保存后使用浏览器运行,可以看到走动的圆形时钟,大家试试看吧
html5时钟
免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件! 如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
更新日志
- 群星.2010-《第13届汕头音响展纪念CD》非卖品[FLAC+CUE]
- 群星.2010-《第13届汕头音响展纪念CD》非卖品[FLAC+CUE]
- 吉尔·沙汉姆-《梁祝柴科夫斯基小提琴协奏曲(GilShaham)》[WAV分轨]
- 《101系列:香港影視傳奇6CD 101首家喻户晓的影视金曲》[WAV+CUE][2.9GB]
- 蔡依林《蔡依林歌曲合集》[320k/MP3][431.6MB]
- 陈宁《破晓 HQⅡ》2024头版限量编号 [WAV+CUE][500MB]
- 瑞鸣音乐《中国音乐地图之听见河南豫剧经典唱段》2020[WAV分轨]
- 【伊比萨沙发】VA-2024-IbizaSpring2024(LoungeCocktailsfromtheHeart)[FLAC]
- 群星《世界顶级汽车音响试音王》4K金碟16CD[WAV+CUE]
- 群星-音效环绕天碟《极致环绕人声天碟天品》7CD[WAV]
- 泰拉克SACD古典试音碟7SACD-ISO
- 群星《红歌宝典》20CD[WAV/分轨]
- 《101系列:好歌101首 细听年代精选》[WAV+CUE][3.6GB]
- 《101系列 6CD 国语经典101首歌曲 张学友 王菲代表作》[APE+CUE][2.8GB]
- 《101系列:国语经典101 VOL2 6CD 精选最经典101首》[WAV+CUE][2.3GB]