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
更新日志
- 廖也欧《面朝大海》[Hi-Res][24bit 48kHz][FLAC/分轨][170.14MB]
- s13T1夺冠五人名单都有谁 s13T1夺冠五人名单一览
- 英雄联盟T1战队队长都有谁 T1战队所有队长介绍
- skt历届战队成员都有哪些 skt历届战队成员名单盘点
- 妙音唱片《大热唱片3》[WAV+CUE]
- 费玉清《跟着地球旋转》滚石时代经典复刻[正版原抓WAV+CUE]
- 罗文甄妮-射雕英雄传(AMCD)(限量版)[WAV+CUE]
- 《巫师4》定档2025再添佐证:参演人员曝光 老将回归
- 辣眼睛 美女COS《黑神话:悟空》比基尼版金池长老
- 外媒称PS5pro违背承诺:《蜘蛛侠2》根本没法4K60帧
- 令晴 Lynn《The Make》[320K/MP3][44.47MB]
- 令晴 Lynn《The Make》[Hi-Res][24bit 48kHz][FLAC/分轨][295.42MB]
- 雷婷《移情别恋HQⅡ》头版限量编号[低速原抓WAV+CUE][1G]
- FUNDAMENTAL.1989-感觉号渡轮【SONY】【WAV+CUE】
- 上山安娜.1986-上山安娜【EMI百代】【WAV+CUE】