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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
*{
padding: 0;
margin: 0;
list-style: none;
}
html{
background: #333;
color: #fff;
}
.box{
position: relative;
top: 100px;
margin: 0 auto;
width: 300px;
height: 300px;
/* border: 1px solid #fff; */
}
.pin{
position: absolute;
top: -50px;
left: 50%;
margin-left: -2px;
width: 4px;
height: 50px;
background: #fff;
}
.ten{
position: absolute;
top: 50%;
left: 50%;
margin-left: -100px;
margin-top: -100px;
width: 200px;
height: 200px;
}
.h, .l{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: #fff;
}
.ten .h{
width: 2px;
height: 200px;
}
.ten .l{
width: 200px;
height: 2px;
}
ul{
width: 300px;
height: 300px;
border-radius: 50%;
transition: all 10ms linear;
}
li{
position: absolute;
top: 0;
left: 50%;
margin-left: -1px;
width: 2px;
height: 20px;
background: red;
transform-origin: 1px 150px;
}
span{
position: absolute;
top: -20px;
left: 50%;
transform: translate(-50%, -50%);
color: #fff;
}
</style>
</head>
<body>
<p>方向：<div id="heading">0</div></p>
<div class="box">
<div class="pin"></div>
<div class="ten">
<div class="l"></div>
<div class="h"></div>
</div>
<ul>
<li><span style="color:red">0</span></li>
<li><span>330</span></li>
<li><span>300</span></li>
<li><span>270</span></li>
<li><span>240</span></li>
<li><span>210</span></li>
<li><span>180</span></li>
<li><span>150</span></li>
<li><span>120</span></li>
<li><span>90</span></li>
<li><span>60</span></li>
<li><span>30</span></li>
</ul>
</div>
<script>
function lineDraw() {
var li = document.getElementsByTagName('li');
var span = document.getElementsByTagName('span');
var len = li.length;
for(var i = 0; i < len; i++) {
// span[i].style.transform = 'rotate('+ -30 * i+'deg)';
li[i].style.transform = 'rotate('+30*i+'deg)';
}
}
lineDraw();
function move(ang) {
var ul = document.getElementsByTagName('ul')[0];
ul.style.transform= 'rotate('+ang+'deg)';
}
function DeviceOrientationHandler(event){
var webkitCompassHeading = event.webkitCompassHeading;
// if(webkitCompassHeading != null){
//判断屏幕方向
var head = '';
var headNum = Math.round(Math.round(webkitCompassHeading/45) + 7)%8;
switch (headNum) {
case 0:
head = '东北';
break;
case 1:
head = '东';
break;
case 2:
head = '东南';
break;
case 3:
head = '南';
break;
case 4:
head = '西南';
break;
case 5:
head = '西';
break;
case 6:
head = '西北';
break;
case 7:
head = '北';
}
move(webkitCompassHeading);
document.getElementById('heading').innerHTML = head + ' ' + Math.round(webkitCompassHeading);
// }else{
// document.body.innerHTML = "当前浏览器不支持DeviceOrientation";
// }
}
if(window.DeviceOrientationEvent){
window.addEventListener('deviceorientation',DeviceOrientationHandler, false);
}else{
alert("您的浏览器不支持DeviceOrientation");
}
</script>
</body>
</html>