首先对DeviceMotionEvent进行优化；
去除无用的代码，重新封装DeviceMotionEven
复制代码代码如下: if(window.DeviceMotionEvent) { var speed = 25;//定义一个数值 var x = y = z = lastX = lastY = lastZ = 0;//重置所有数值 window.addEventListener(‘devicemotion’, function(){ var acceleration =event.accelerationIncludingGravity;//将传感值赋给acceleration x
