html5利用重力感应实现摇一摇换颜色可用来做抽奖等等_html5教程技巧

1、必须要ios或者是安卓4.0以上的才能实现功能应用。

2、如果加如z坐标的判断，就会出现屏幕乱变颜色的情况，估计太敏感了…………或者是没找到对的用法，希望大家能给指正

3、这个功能稍微改改，就可以变成抽奖的方法，比大转盘、刮刮卡要时尚些，哈哈

代码如下:

var color = new Array('red', 'blue', 'yellow', 'green', '#00f', '#0ff');
if(window.DeviceMotionEvent) {
var speed = 25;
var x = y = z = lastX = lastY = lastZ = 0;
window.addEventListener('devicemotion', function(){
var acceleration =event.accelerationIncludingGravity;
x = acceleration.x;
y = acceleration.y;
//z = acceleration.z;
if(Math.abs(x-lastX) > speed || Math.abs(y-lastY) > speed ) {
document.body.style.backgroundColor = color[Math.round(Math.random()*10)%6];
}
lastX = x;
lastY = y;
//lastZ = z;
}, false);
}