HTML5 重力感应效果，实现摇一摇效果

时间：2023-12-25 14:28:13
<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">

    <meta name="format-detection" content="telephone=no" />

    <title> HTML5 重力感应效果，实现摇一摇效果 </title>

    <style>

        html,body,div,ul,li{

            margin: 0;

            padding: 0;

        }

        ul,li{

            list-style: none;

        }

        body{

            width:100%;

        }

        #box{

            width:90%;

            height:80px;

            background-color:orange;

            margin:0 auto;

            color:#fff;

            background-position: center -50px;

        }

    </style>

</head>

<body>

    <div id="box"></div>

<script>

        //摇晃的力度

        var SHAKE_THRESHOLD = 2000;

        var last_update = 0;

        //初始化重力感应位置

        var x = y = z = last_x = last_y = last_z = 0;  

        function deviceMotionHandler(eventData) {

            var acceleration = eventData.accelerationIncludingGravity;

            var curTime = new Date().getTime();

            if ( (curTime - last_update) > 100 ) {

                var diffTime = curTime - last_update;

                last_update = curTime;

                x = acceleration.x;

                y = acceleration.y;

                z = acceleration.z;

                var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;

                last_x = x;

                last_y = y;

                last_z = z; 

                //获取 X Y Z 的数值

                document.getElementById('box').innerHTML = 'X:'+last_x+'<br> Y:'+last_y+'<br> Z:'+last_z; 

                //如果速度大于摇晃的力度那么执行alert

                if (speed > SHAKE_THRESHOLD) {

                    alert('摇一摇');

                }

            }

        }

        //判断是否支持重力感应

        if (window.DeviceMotionEvent) {

            window.addEventListener('devicemotion', deviceMotionHandler, false);

        } else {

            alert('not support mobile event');

        }  

</script>

</body>

</html>

　　

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