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每日CSS_实时时钟效果

2020-12-22 10:42 1141 查看

每日CSS_实时时钟效果

2020_12_22

源码链接
附: 时钟照片地址如下 (http://cdn.xiaxiang.tech/E:/frondend/travel/css/每日CSS/2020__12/clock2.png)

1. 代码解析

1.1 html 代码片段

<div class="clock">
<div class="hour">
<div class="hr" id="hr"></div>
</div>
<div class="min">
<div class="mn" id="mn"></div>
</div>
<div class="sec">
<div class="sc" id="sc"></div>
</div>
</div>

如类名所示, clock 容纳整个时钟, 其子类 hour, min, sec 为各个指针的容纳块, 而 hr, mn, sc 代表了各个指针.

1.2 script 代码片段

<script>
const deg = 6;
const hr = document.querySelector('#hr');
const mn = document.querySelector('#mn');
const sc = document.querySelector('#sc');

setInterval(()=>{
let day = new Date();
// 一个小时转 30 度
let hh = day.getHours() * 30;
let mm = day.getMinutes() * deg;
let ss = day.getSeconds() * deg;
hr.style.transform = `rotateZ(${(hh)+(mm/12)}deg)`;
mn.style.transform = `rotateZ(${mm}deg)`;
// ``是模板运算符, 可以自动执行
sc.style.transform = `rotateZ(${ss}deg)`;
})
</script>

需要注意的代码有两个,

hr.style.transform =

rotateZ(${(hh)+(mm/12)}deg)

60分钟时钟转30度, 所以, 分钟和时钟转的度数有个两倍关系, 此时的 mm 是分钟 * 6, 因此, 时钟转的度数是, mm / (2*6).

const deg = 6;

时钟有 60 个小格, 360度, 因此每格 6 度.

1.3 css 代码片段

基础设置

*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #98889c;
}

时钟背景设置

.clock{
width: 350px;
height: 350px;
display: flex;
justify-content: center;
align-items: center;
background: url("clock2.png");
background-size: cover;
border: 4px solid #0f1621;
border-radius: 50%;
box-shadow: 0 -15px 15px rgba(255, 255, 255, 0.05),
inset 0 -15px 15px rgba(255, 255, 255, 0.05),
0 15px 15px rgba(0, 0, 0, 0.3),
inset 0 15px 15px rgba(0, 0, 0, 0.3);
}

中心小圆点设置

.clock:before{
content: "";
position: absolute;
width: 15px;
height: 15px;
background: #fff;
border-radius: 50%;
z-index: 10;
}

时钟, 分钟, 秒钟区域设置

.clock .hour,
.clock .min,
.clock .sec{
position: absolute;
}
.clock .hour, .hr{
width: 160px;
height: 160px;
}
.clock .min, .mn{
width: 190px;
height: 190px;
}
.clock .sec, .sc{
width: 230px;
height: 230px;
}
.hr, .mn, .sc{
display: flex;
justify-content: center;
border-radius: 50%;
}

时钟, 分钟, 秒钟的指针创建

.hr:before{
content: "";
position: absolute;
width: 8px;
height: 80px;
background: #ff105e;
z-index: 1;
border-radius: 6px 6px 0 0;
}
.mn:before{
content: "";
position: absolute;
width: 4px;
height: 90px;
background: #fff;
z-index: 2;
border-radius: 6px 6px 0 0;
}
.sc:before{
content: "";
position: absolute;
width: 2px;
height: 150px;
background: #fff;
z-index: 3;
border-radius: 6px 6px 0 0;
}

2. 源码

2.1 html 源码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="2020_12_21.css">
</head>
<body>
<div class="clock">
<div class="hour">
<div class="hr" id="hr"></div>
</div>
<div class="min">
<div class="mn" id="mn"></div>
</div>
<div class="sec">
<div class="sc" id="sc"></div>
</div>
</div><script>
const deg = 6;
const hr = document.querySelector('#hr');
const mn = document.querySelector('#mn');
const sc = document.querySel
ad8
ector('#sc');

setInterval(()=>{
let day = new Date();
// 一个小时转 30 度
let hh = day.getHours() * 30;
let mm = day.getMinutes() * deg;
let ss = day.getSeconds() * deg;

// console.log(hh);

hr.style.transform = `rotateZ(${(hh)+(mm/12)}deg)`;
mn.style.transform = `rotateZ(${mm}deg)`;
sc.style.transform = `rotateZ(${ss}deg)`;
})

</script>
</body>
</html>

2.2 css 源码

*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #98889c;
}.clock{
width: 350px;
height: 350px;
display: flex;
justify-content: center;
align-items: center;
background: url("clock2.png");
background-size: cover;
border: 4px solid #0f1621;
border-radius: 50%;
box-shadow: 0 -15px 15px rgba(255, 255, 255, 0.05),
inset 0 -15px 15px rgba(255, 255, 255, 0.05),
0 15px 15px rgba(0, 0, 0, 0.3),
inset 0 15px 15px rgba(0, 0, 0, 0.3);
}.clock:before{
content: "";
position: absolute;
width: 15px;
height: 15px;
background: #fff;
border-radius: 50%;
z-index: 10;
}.clock .hour,
.clock .min,
.clock .sec{
position: absolute;
}
.clock .hour, .hr{
width: 160px;
height: 160px;
}
.clock .min, .mn{
width: 190px;
height: 190px;
}
.clock .sec, .sc{
width: 230px;
height: 230px;
}
.hr, .mn, .sc{
display: flex;
justify-content: center;
border-radius: 50%;
}.hr:before{
content: "";
position: absolute;
width: 8px;
height: 80px;
background: #ff105e;
z-index: 1;
border-radius: 6px 6px 0 0;
}
.mn:before{
content: "";
position: absolute;
width: 4px;
height: 90px;
background: #fff;
z-index: 2;
border-radius: 6px 6px 0 0;
}
.sc:before{
content: "";
position: absolute;
width: 2px;
height: 150px;
background: #fff;
z-index: 3;
border-radius: 6px 6px 0 0;
}

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