基于HTML5实现类似微信手机摇一摇功能(计算摇动次数)

 var jsonObject=null; // 当页面加载完以后会执行window.onload window.onload = function() { var times = -1; // 记录摇动次数 var last_time = 0; var borderSpeed = 800;  // 加速度变化临界值 var x = y = z = last_x = last_y = last_z = 0; if (window.DeviceMotionEvent) { window.addEventListener('devicemotion',shake,false); } else { alert('您的设备不支持摇一摇哦'); } // 每次手机移动的时候都会执行下面shake函数的代码 function shake(eventData) { var acceleration = eventData.accelerationIncludingGravity; var curTime = new Date().getTime(); var diffTime  = curTime-last_time; // 每隔100ms进行判断 if (diffTime>100) { x = acceleration.x; y = acceleration.y; z = acceleration.z; var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000; // 判断手机确实发生了摇动而不是正常的移动 if (speed>borderSpeed) { times++; document.getElementById("text").innerHTML=times+" times"; // 用户的微信昵称和头像连接发送一次即可，不需要每次都发送 if (times==0) { document.forms["insertForm"].headimg.value =img ; document.forms["insertForm"].user.value = nickname; } document.forms["insertForm"].time.value = times; } last_time = curTime; last_x = x; last_y = y; last_z = z; } } }