SOLUTION
我考虑了滚动位置并最终得到以下结果：
var touchHeight = $('.mobile-touch-overflow').height(),
screenHeight = utils.getScreenHeight() - (utils.notStandalone()?44:0);
// touchOverflow: hide adressbar when scrolling
if(touchHeight > screenHeight && utils.supportTouchOverflow())
{
$('.mobile-touch-overflow').bind('touchmove',function(){
if($('.page-content').offset().top < 0)
{
utils.windowScroll(1);
}
return true;
});
}
这里是测试文件：
<!DOCTYPE html>
<html>
<head>
<title>title</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<!-- viewport -->
<meta content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" />
<!-- webapp -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style type='text/css'>
body {
background: #E0E0E0;
margin: 0;
padding: 0;
overflow-x: hidden;
}
.page-wrapper {
width: auto;
}
/* native overflow scrolling */
.mobile-touch-overflow {
overflow: auto;
-webkit-overflow-scrolling: touch;
}
.mobile-touch-overflow,
.mobile-touch-overflow * {
/* some level of transform keeps elements from blinking out of visibility on iOS */
-webkit-transform: rotateY(0);
}
.page-header {
display: block;
background: gray;
border-bottom: 1px solid #CDCDCD;
padding: 10px;
}
.page-content {
padding: 10px;
}
.page-footer {
display: block;
border-top: 1px solid #CDCDCD;
margin-left: 10px;
margin-right: 10px;
padding: 10px;
padding-left: 0;
padding-right: 0;
text-align: center;
font-size: 12px;
color: #FFF;
}
</style>
<script src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
<script type="text/javascript">
/*
* utils
*/
var utils = {
init : function(){
var touchHeight = $('.mobile-touch-overflow').height(),
screenHeight = utils.getScreenHeight() - (utils.notStandalone()?44:0);
// touchOverflow: hide adressbar when scrolling
if(touchHeight > screenHeight && utils.supportTouchOverflow())
{
$('.mobile-touch-overflow').bind('touchmove',function(){
if($('.page-content').offset().top < 0)
{
utils.windowScroll(1);
}
return true;
});
}
},
supportTouchOverflow : function(){
return !!utils.propExists( "overflowScrolling" );
},
supportOrientation : function(){
return ("orientation" in window && "onorientationchange" in window);
},
//simply set the active page's minimum height to screen height, depending on orientation
getScreenHeight : function(){
var orientation = utils.getOrientation(),
port = orientation === "portrait",
winMin = port ? 480 : 320,
screenHeight = port ? screen.availHeight : screen.availWidth,
winHeight = Math.max( winMin, $(window).height() ),
pageMin = Math.min( screenHeight, winHeight);
return pageMin;
},
getWindowHeight : function(){
return window.innerHeight ? window.innerHeight : $(window).height();
},
// Get the current page orientation. This method is exposed publicly, should it
// be needed, as jQuery.event.special.orientationchange.orientation()
getOrientation : function() {
var isPortrait = true,
elem = document.documentElement,
portrait_map = { "0": true, "180": true };
// prefer window orientation to the calculation based on screensize as
// the actual screen resize takes place before or after the orientation change event
// has been fired depending on implementation (eg android 2.3 is before, iphone after).
// More testing is required to determine if a more reliable method of determining the new screensize
// is possible when orientationchange is fired. (eg, use media queries + element + opacity)
if ( utils.supportOrientation() ) {
// if the window orientation registers as 0 or 180 degrees report
// portrait, otherwise landscape
isPortrait = portrait_map[ window.orientation ];
} else {
isPortrait = elem && elem.clientWidth / elem.clientHeight < 1.1;
}
return isPortrait ? "portrait" : "landscape";
},
windowScroll : function(ypos) {
setTimeout(function() {
window.scrollTo( 0, ypos );
}, 20 );
},
setTouchHeight : function(time) {
setTimeout(function() {
var footerHeight = (utils.notStandalone())?44:0;
$('.mobile-touch-overflow').height( utils.getScreenHeight() - footerHeight );
}, time );
},
notStandalone : function(){
return (("standalone" in window.navigator) && !window.navigator.standalone);
},
propExists : function(prop) {
var fakeBody = $( "<body>" ).prependTo( "html" ),
fbCSS = fakeBody[ 0 ].style,
vendors = [ "Webkit", "Moz", "O" ],
uc_prop = prop.charAt( 0 ).toUpperCase() + prop.substr( 1 ),
props = ( prop + " " + vendors.join( uc_prop + " " ) + uc_prop ).split( " " );
for ( var v in props ){
if ( fbCSS[ props[ v ] ] !== undefined ) {
fakeBody.remove();
return true;
}
}
},
hideAdressbar : function(){
if(utils.supportTouchOverflow()){
utils.setTouchHeight(0);
}
utils.windowScroll(1);
}
};//utils end
// WINDOW LOAD
$(window).load(function(){
utils.hideAdressbar();
});
$(document).ready(function(){
utils.init();
});
</script>
</head>
<body>
<div class="page-wrapper mobile-touch-overflow">
<header class="page-header">Header</header>
<div class="page-content">
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</div>
<footer class="page-footer">Footer</footer>
</div>
</body>
</html>
