javascript 手机手势动作touch触屏原理分析,h5触摸下拉刷新上拉加载数据原理
<!DOCTYPE>
<html>
<head>
<meta id="viewport" name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<meta name="MobileOptimized" content="320"/>
<title>触屏特效,手机网页</title>
<style type="text/css">
html{-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;}
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td,hr,button,article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section {margin:0;padding:0;}
.dragme{background:#000;width:60px;height:60px; color:#fff; position:absolute; left:40px; top:40px; text-align:center; line-height:60px;}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<div id="moveid" class="dragme">
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</div>
<script type="text/javascript">
var isdrag=false;
var tx,x,ty,y;
$(function(){
document.getElementById("moveid").addEventListener("touchstart",touchStart);
document.getElementById("moveid").addEventListener("touchmove",touchMove);
document.getElementById("moveid").addEventListener("touchend",function(){
isdrag = false;
});
});
function touchStart(e){
isdrag = true;
e.preventDefault();
tx = parseInt($("#moveid").css("left"));
ty = parseInt($("#moveid").css("top"));
x = e.touches[0].pageX;
y = e.touches[0].pageY;
}
function touchMove(e){
if (isdrag){
e.preventDefault();
var n = tx + e.touches[0].pageX - x;
var h = ty + e.touches[0].pageY - y;
$("#moveid").css("left",n);
$("#moveid").css("top",h);
}
}
</script>
</body>
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