西安网站推广助理天津seo公司
问题：devicemotion 或者 deviceorientation 在window.addEventListener 事件中不生效，没有输出内容
原因：
1、必须在Https协议下才可使用
2、必须用户手动点击click事件中调用 ，进行权限申请
源码：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=375,user-scalable=0"><title>deviceorientation</title>
</head>
<body><button onclick="start()">start</button>
<script>(function () { var script = document.createElement('script'); script.src="https://cdn.jsdelivr.net/npm/eruda"; document.body.appendChild(script); script.onload = function () { eruda.init() } })();function start(){if(!DeviceMotionEvent){console.error('暂时不支持')}else{if(DeviceMotionEvent.requestPermission){DeviceMotionEvent.requestPermission().then(permissionState => {console.log(permissionState)if (permissionState === 'granted') {// window.addEventListener('devicemotion', function(e) { console.log('devicemotion', e)}, true);window.addEventListener('deviceorientation', function(event) { console.log('deviceorientation', event) ; console.log(`${event.alpha} : ${event.beta} : ${event.gamma}`);}, true);}}).catch((err) => {console.error(err);});}else{// window.addEventListener('devicemotion', function(e) { console.log('devicemotion', e)}, true);window.addEventListener('deviceorientation', function(event) { console.log('deviceorientation', event) ; console.log(`${event.alpha} : ${event.beta} : ${event.gamma}`);}, true);}}}window.onload=function(){start() //此处调用无效，没有内容输出}
</script></body>
</html>