css3-手把手 transform 小时钟
学习css3ing，正在学习transfomr，突发奇想用此做个小时钟，开始吧：
- 准备前期工作，把时钟的表盘，时分秒针，实时时间标签 的大概样子做好，效果如图：
html代码如下：
<div class="main">
<div id="timeLabel"></div>
<div id="hour"></div>
<div id="minute"></div>
<div id="second"></div>
</div>
css 代码如下：
1 <style>
2 * {
3 margin: 0;
4 padding: 0;
5 }
6 .main {
7 position: relative;
8 margin: 100px auto;
9 width: 300px;
10 height: 300px;
11 border-radius: 300px;
12 border: 1px solid #000;
13 box-shadow:2px 5px;
14 }
15 #timeLabel {
16 position: absolute;
17 background-color:pink;
18 width:100px;
19 height:30px;
20 left:100px;
21 top:180px;
22 }
23
24 #hour {
25 width: 100px;
26 height: 10px;
27 background-color: red;
28 position:absolute;
29 left:150px;
30 top:145px;
31 }
32 #minute {
33 width:120px;
34 height:8px;
35 background-color:blue;
36 position:absolute;
37 left:150px;
38 top:146px;
39 }
40 #second {
41 width: 140px;
42 height: 4px;
43 background-color: green;
44 position: absolute;
45 left: 150px;
46 top: 148px;
47 }
48 </style>
2. 初始化默认时间，和表盘刻度 ，效果如下：
更改后的css代码：
<style>
* {
margin:;
padding:;
} .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:;
}
.minuterPointer {
height: 8px;
width: 10px;
left: 150px;
top: 146px;
background-color: #b6ff00;
z-index:;
}
.secondPointer {
height: 6px;
width: 8px;
left: 150px;
top: 147px;
background-color: #fa8;
z-index:;
}
</style>
初始化 js代码：
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 = $("second");
var now = new Date();
var nowHour = now.getHours();
var nowMinute = now.getMinutes();
var nowSecond = now.getSeconds();
//初始化timeLabel
timeLabel.innerHTML = nowHour + ":" + nowMinute + ":" + nowSecond;
//初始化表盘
for (var index = 0; index < 4; index++) {
CreateKeDu(main, "hourPointer", index * 90, 138);
}
for (var index = 0; index < 12; index++) {
CreateKeDu(main, "minuterPointer",index*30, 140);
}
for (var index = 0; index < 60; index++) {
CreateKeDu(main, "secondPointer", index * 6, 142);
}
//初始化时分秒针
second.style.transform = "rotate(" + (nowSecond * 6 - 90) + "deg)";
minute.style.transform = "rotate(" + (nowMinute * 6 + 1 / 10 * nowSecond - 90) + "deg)";
hour.style.transform = "rotate(" + (nowHour * 30 + 1 / 2 * nowMinute + 1 / 120 * nowSecond - 90) + "deg)";
}
3.添加定时器：
js代码如下：
//定时器
function startMove() {
clearInterval(timer);
timer = setInterval(function () {
var now = new Date();
var nowSecond = now.getSeconds();
var nowMinute = now.getMinutes();
var nowHour = now.getHours(); second.style.transform = "rotate(" + (nowSecond * 6 - 90) + "deg)";
minute.style.transform = "rotate(" + (nowMinute * 6 + 1 / 10 * nowSecond - 90) + "deg)";
hour.style.transform = "rotate(" + (nowHour * 30 + 1 / 2 * nowMinute + 1 / 120 * nowSecond - 90) + "deg)";
timeLabel.innerHTML = nowHour + ":" + nowMinute + ":" + nowSecond;
}, 1000);
}
4.使用OOP方式更改：
修改后的js代码如下：
function Clock() {
//定义属性
this.main = this.$("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;
//初始化函数
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;
//初始化表盘
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);
}
最后调用如下：
window.onload = function () {
new Clock();
}
最终页面代码：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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() {
//定义属性
this.main = this.$("biaopan");
this.timeLabel = this.$("timeLabel");
this.hour = this.$("hour");
this.minute = this.$("minute");
this.second = this.$("second");
this.nowHour = null;
this.nowMinute = null;
this.nowSecond = null;
this.timer = null; var _this = this; //初始化函数
var init = function () {
_this.getNowTime();
_this.initClock();
_this.InterVal();
}
init();
} Clock.prototype.$ = 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; //初始化表盘
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>
总结：本例中使用了css3 的transform属性中的 rotate的旋转效果和translate的位移效果，关于transform的使用 请参考 http://www.w3school.com.cn/cssref/pr_transform.asp
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