在iOS Safari中使用Javascript检测抖动?
答
看到这个真棒博客文章:http://www.jeffreyharrell.com/blog/2010/11/creating-a-shake-event-in-mobile-safari/
这说明这个例子:
if (typeof window.DeviceMotionEvent != 'undefined') {
// Shake sensitivity (a lower number is more)
var sensitivity = 20;
// Position variables
var x1 = 0, y1 = 0, z1 = 0, x2 = 0, y2 = 0, z2 = 0;
// Listen to motion events and update the position
window.addEventListener('devicemotion', function (e) {
x1 = e.accelerationIncludingGravity.x;
y1 = e.accelerationIncludingGravity.y;
z1 = e.accelerationIncludingGravity.z;
}, false);
// Periodically check the position and fire
// if the change is greater than the sensitivity
setInterval(function() {
var change = Math.abs(x1-x2+y1-y2+z1-z2);
if (change > sensitivity) {
alert('Shake!');
}
// Update new position
x2 = x1;
y2 = y1;
z2 = z1;
}, 150);
}
优秀。感谢您添加代码提取。应该有帮助! – tbeseda 2010-12-17 22:33:50
只是一个警告:accelerationIncludingGravity将永远不会有所有三个组件零。如果重力直接作用于一个轴,则该轴的值将为9.81。另外,为什么不在活动中检查震动,而不是在间隔中检查? – ughoavgfhw 2010-12-17 22:39:30
@ughoavgfhw你能提出一段代码吗? – andi 2013-04-10 10:25:43