指北针demo 

<html>
<head>
  <title>DeviceOrientationEvent</title>
  <meta charset="UTF-8" />
</head>
<body>
  <p>左右：<span id="alpha">0</span></p>
  <p>前后：<span id="beta">0</span></p>
  <p>扭转：<span id="gamma">0</span></p>
  <p>指北针指向：<span id="heading">0</span>度</p>
  <p>指北针精度：<span id="accuracy">0</span>度</p>
</body>
<script>
    //检查手机是否支持
 if(window.DeviceOrientationEvent){
    window.addEventListener('deviceorientation',DeviceOrientationHandler,false);
}else{
    alert("您的浏览器不支持DeviceOrientation");
}
//事件处理逻辑
function DeviceOrientationHandler(event){
      document.getElementById("alpha").innerHTML = event.alpha;
      document.getElementById("beta").innerHTML = event.beta;
      document.getElementById("gamma").innerHTML = event.gamma;
      document.getElementById("heading").innerHTML = event.webkitCompassHeading;
      document.getElementById("accuracy").innerHTML = event.webkitCompassAccuracy;
}
</script>
</html>

 

posted on 2018-04-28 14:16  要一份黄焖鸡  阅读(163)  评论(0)    收藏  举报

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