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學習css3ing，正在學習transfomr，突發(fā)奇想用此做個小時鐘，開始吧：

準備前期工作，把時鐘的表盤，時分秒針，實時時間標簽 的大概樣子做好，效果如圖：

html代碼如下：

代碼如下:

<div class="main">

<div id="timeLabel"></div>

<div id="hour"></div>

<div id="minute"></div>

<div id="second"></div>

</div>

css 代碼如下：

代碼如下:

<style>

* {

margin: 0;

padding: 0;

}

.main {

position: relative;

margin: 100px auto;

width: 300px;

height: 300px;

border-radius: 300px;

border: 1px solid #000;

box-shadow:2px 5px;

}

#timeLabel {

position: absolute;

background-color:pink;

width:100px;

height:30px;

left:100px;

top:180px;

}

#hour {

width: 100px;

height: 10px;

background-color: red;

position:absolute;

left:150px;

top:145px;

}

#minute {

width:120px;

height:8px;

background-color:blue;

position:absolute;

left:150px;

top:146px;

}

#second {

width: 140px;

height: 4px;

background-color: green;

position: absolute;

left: 150px;

top: 148px;

}

</style>

2. 初始化默認時間，和表盤刻度 ，效果如下：

更改后的css代碼：

代碼如下:

<style>

* {

margin: 0;

padding: 0;

}

.main {

position: relative;

margin: 100px auto;

width: 300px;

height: 300px;

border-radius: 300px;

border: 1px solid #000;

box-shadow: 2px 5px #808080;

}

#timeLabel {

position: absolute;

background-color: pink;

width: 80px;

height: 25px;

left: 110px;

top: 180px;

color: #fff;

line-height: 25px;

text-align: center;

}

#hour {

width: 100px;

height: 10px;

background-color: red;

position: absolute;

left: 150px;

top: 145px;

transform-origin: 0 50%;

}

#minute {

width: 120px;

height: 8px;

background-color: blue;

position: absolute;

left: 150px;

top: 146px;

transform-origin: 0 50%;

}

#second {

width: 140px;

height: 4px;

background-color: green;

position: absolute;

left: 150px;

top: 148px;

transform-origin: 0 50%;

}

.hourPointer, .minuterPointer, .secondPointer {

position: absolute;

transform-origin: 0 50%;

}

.hourPointer {

height: 10px;

width: 12px;

left: 150px;

top: 145px;

background-color: #f00;

z-index:3;

}

.minuterPointer {

height: 8px;

width: 10px;

left: 150px;

top: 146px;

background-color: #b6ff00;

z-index: 2;

}

.secondPointer {

height: 6px;

width: 8px;

left: 150px;

top: 147px;

background-color: #fa8;

z-index: 1;

}

</style>

初始化 js代碼：

代碼如下:

window.onload = function () {

initClock();

}

var timer = null;

function $(id) {

return document.getElementById(id)

}

function CreateKeDu(pElement, className, deg, translateWidth) {

var Pointer = document.createElement("div");

Pointer.className = className

Pointer.style.transform = "rotate(" + deg + "deg) translate(" + translateWidth + "px)";

pElement.appendChild(Pointer);

}

function initClock() {

var main = $("biaopan");

var timeLabel = $("timeLabel");

var hour = $("hour");

var minute = $("minute");

var second = $("second");

var now = new Date();

var nowHour = now.getHours();

var nowMinute = now.getMinutes();

var nowSecond = now.getSeconds();

//初始化timeLabel

timeLabel.innerHTML = nowHour + ":" + nowMinute + ":" + nowSecond;

//初始化表盤

for (var index = 0; index < 4; index++) {

CreateKeDu(main, "hourPointer", index * 90, 138);

}

for (var index = 0; index < 12; index++) {

CreateKeDu(main, "minuterPointer",index*30, 140);

}

for (var index = 0; index < 60; index++) {

CreateKeDu(main, "secondPointer", index * 6, 142);

}

//初始化時分秒針

second.style.transform = "rotate(" + (nowSecond * 6 - 90) + "deg)";

minute.style.transform = "rotate(" + (nowMinute * 6 + 1 / 10 * nowSecond - 90) + "deg)";

hour.style.transform = "rotate(" + (nowHour * 30 + 1 / 2 * nowMinute + 1 / 120 * nowSecond - 90) + "deg)";

}

3.添加定時器：

js代碼如下：

代碼如下:

//定時器

function startMove() {

clearInterval(timer);

timer = setInterval(function () {

var now = new Date();

var nowSecond = now.getSeconds();

var nowMinute = now.getMinutes();

var nowHour = now.getHours();

second.style.transform = "rotate(" + (nowSecond * 6 - 90) + "deg)";

minute.style.transform = "rotate(" + (nowMinute * 6 + 1 / 10 * nowSecond - 90) + "deg)";

hour.style.transform = "rotate(" + (nowHour * 30 + 1 / 2 * nowMinute + 1 / 120 * nowSecond - 90) + "deg)";

timeLabel.innerHTML = nowHour + ":" + nowMinute + ":" + nowSecond;

}, 1000);

}

4.使用OOP方式更改：

修改后的js代碼如下：

代碼如下:

function Clock() {

//定義屬性

this.main = this.$("biaopan");

this.timeLabel = this.$("timeLabel");

this.hour = this.$("hour");

this.minute = this.$("minute");

this.second = this.$("second");

this.nowHour = null;

this.nowMinute = null;

this.nowSecond = null;

this.timer = null;

var _this = this;

//初始化函數(shù)

var init = function () {

_this.getNowTime();

_this.initClock();

_this.InterVal();

}

init();

}

Clock.prototype.$ = function (id) {

return document.getElementById(id)

}

Clock.prototype.CreateKeDu = function (className, deg, translateWidth) {

var Pointer = document.createElement("div");

Pointer.className = className

Pointer.style.transform = "rotate(" + deg + "deg) translate(" + translateWidth + "px)";

this.main.appendChild(Pointer);

}

Clock.prototype.getNowTime = function () {

var now = new Date();

this.nowHour = now.getHours();

this.nowMinute = now.getMinutes();

this.nowSecond = now.getSeconds();

}

Clock.prototype.setPosition = function () {

this.second.style.transform = "rotate(" + (this.nowSecond * 6 - 90) + "deg)";

this.minute.style.transform = "rotate(" + (this.nowMinute * 6 + 1 / 10 * this.nowSecond - 90) + "deg)";

this.hour.style.transform = "rotate(" + (this.nowHour * 30 + 1 / 2 * this.nowMinute + 1 / 120 * this.nowSecond - 90) + "deg)";

}

Clock.prototype.initClock = function () {

//初始化timeLabel

this.timeLabel.innerHTML = this.nowHour + ":" + this.nowMinute + ":" + this.nowSecond;

//初始化表盤

for (var index = 0; index < 4; index++) {

this.CreateKeDu("hourPointer", index * 90, 138);

}

for (var index = 0; index < 12; index++) {

this.CreateKeDu("minuterPointer", index * 30, 140);

}

for (var index = 0; index < 60; index++) {

this.CreateKeDu("secondPointer", index * 6, 142);

}

this.setPosition();

}

Clock.prototype.InterVal = function () {

clearInterval(this.timer);

var _this = this;

this.timer = setInterval(function () {

_this.getNowTime();

_this.second.style.transform = "rotate(" + (_this.nowSecond * 6 - 90) + "deg)";

_this.minute.style.transform = "rotate(" + (_this.nowMinute * 6 + 1 / 10 * _this.nowSecond - 90) + "deg)";

_this.hour.style.transform = "rotate(" + (_this.nowHour * 30 + 1 / 2 * _this.nowMinute + 1 / 120 * _this.nowSecond - 90) + "deg)";

_this.timeLabel.innerHTML = _this.nowHour + ":" + _this.nowMinute + ":" + _this.nowSecond;

}, 1000);

}

最后調用如下：

代碼如下:

window.onload = function () {

new Clock();

}

最終頁面代碼：

代碼如下:

<!DOCTYPE html>

<html xmlns="<a href="

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title></title>

<style>

* {

margin: 0;

padding: 0;

}

.main {

position: relative;

margin: 100px auto;

width: 300px;

height: 300px;

border-radius: 300px;

border: 1px solid #000;

box-shadow: 2px 5px #808080;

}

#timeLabel {

position: absolute;

background-color: pink;

width: 80px;

height: 25px;

left: 110px;

top: 180px;

color: #fff;

line-height: 25px;

text-align: center;

}

#hour {

width: 100px;

height: 10px;

background-color: red;

position: absolute;

left: 150px;

top: 145px;

transform-origin: 0 50%;

}

#minute {

width: 120px;

height: 8px;

background-color: blue;

position: absolute;

left: 150px;

top: 146px;

transform-origin: 0 50%;

}

#second {

width: 140px;

height: 4px;

background-color: green;

position: absolute;

left: 150px;

top: 148px;

transform-origin: 0 50%;

}

.hourPointer, .minuterPointer, .secondPointer {

position: absolute;

transform-origin: 0 50%;

}

.hourPointer {

height: 10px;

width: 12px;

left: 150px;

top: 145px;

background-color: #f00;

z-index: 3;

}

.minuterPointer {

height: 8px;

width: 10px;

left: 150px;

top: 146px;

background-color: #b6ff00;

z-index: 2;

}

.secondPointer {

height: 6px;

width: 8px;

left: 150px;

top: 147px;

background-color: #fa8;

z-index: 1;

}

</style>

<script>

function Clock() {

//定義屬性

this.main = this.$("biaopan");

this.timeLabel = this.$("timeLabel");

this.hour = this.$("hour");

this.minute = this.$("minute");

this.second = this.$("second");

this.nowHour = null;

this.nowMinute = null;

this.nowSecond = null;

this.timer = null;

var _this = this;

//初始化函數(shù)

var init = function () {

_this.getNowTime();

_this.initClock();

_this.InterVal();

}

init();

}

Clock.prototype.$ = function (id) {

return document.getElementById(id)

}

Clock.prototype.CreateKeDu = function (className, deg, translateWidth) {

var Pointer = document.createElement("div");

Pointer.className = className

Pointer.style.transform = "rotate(" + deg + "deg) translate(" + translateWidth + "px)";

this.main.appendChild(Pointer);

}

Clock.prototype.getNowTime = function () {

var now = new Date();

this.nowHour = now.getHours();

this.nowMinute = now.getMinutes();

this.nowSecond = now.getSeconds();

}

Clock.prototype.setPosition = function () {

this.second.style.transform = "rotate(" + (this.nowSecond * 6 - 90) + "deg)";

this.minute.style.transform = "rotate(" + (this.nowMinute * 6 + 1 / 10 * this.nowSecond - 90) + "deg)";

this.hour.style.transform = "rotate(" + (this.nowHour * 30 + 1 / 2 * this.nowMinute + 1 / 120 * this.nowSecond - 90) + "deg)";

}

Clock.prototype.initClock = function () {

//初始化timeLabel

this.timeLabel.innerHTML = this.nowHour + ":" + this.nowMinute + ":" + this.nowSecond;

//初始化表盤

for (var index = 0; index < 4; index++) {

this.CreateKeDu("hourPointer", index * 90, 138);

}

for (var index = 0; index < 12; index++) {

this.CreateKeDu("minuterPointer", index * 30, 140);

}

for (var index = 0; index < 60; index++) {

this.CreateKeDu("secondPointer", index * 6, 142);

}

this.setPosition();

}

Clock.prototype.InterVal = function () {

clearInterval(this.timer);

var _this = this;

this.timer = setInterval(function () {

_this.getNowTime();

_this.second.style.transform = "rotate(" + (_this.nowSecond * 6 - 90) + "deg)";

_this.minute.style.transform = "rotate(" + (_this.nowMinute * 6 + 1 / 10 * _this.nowSecond - 90) + "deg)";

_this.hour.style.transform = "rotate(" + (_this.nowHour * 30 + 1 / 2 * _this.nowMinute + 1 / 120 * _this.nowSecond - 90) + "deg)";

_this.timeLabel.innerHTML = _this.nowHour + ":" + _this.nowMinute + ":" + _this.nowSecond;

}, 1000);

}

window.onload = function () {

new Clock();

}

</script>

</head>

<body>

<div class="main" id="biaopan">

<div id="timeLabel"></div>

<div id="hour"></div>

<div id="minute"></div>

<div id="second"></div>

</div>

</body>

</html>

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