直接看代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes" />
<title>移动端，判断滑动方向</title>
<script src="http://apps.bdimg.com/libs/jquery/1.10.1/jquery.min.js"></script>
</head>
<body>
<script type="text/javascript">
var windowHeight = $(window).height();
$("body").css("height", windowHeight);
var startX, startY, moveEndX, moveEndY, X, Y;
$("body").on("touchstart", function(e) {
e.preventDefault();
startX = e.originalEvent.changedTouches[0].pageX, startY = e.originalEvent.changedTouches[0].pageY;
});
$("body").on("touchmove", function(e) {
e.preventDefault();
moveEndX = e.originalEvent.changedTouches[0].pageX, moveEndY = e.originalEvent.changedTouches[0].pageY, X = moveEndX - startX, Y = moveEndY - startY;
if (Math.abs(X) > Math.abs(Y) && X > 0) {
alert("left to right");
} else if (Math.abs(X) > Math.abs(Y) && X < 0) {
alert("right to left");
} else if (Math.abs(Y) > Math.abs(X) && Y > 0) {
alert("top to bottom");
} else if (Math.abs(Y) > Math.abs(X) && Y < 0) {
alert("bottom to top");
} else {
alert("just touch");
}
});
</script>
</body>
</html>