iscroll上拉下滑加载数据.doc

第一步：页面展示第一页数据
<div id="wrapper">
<div id="scroller" class="food_d">
<div id="pullDown">
<span class="pullDownIcon"></span><span class="pullDownLabel" style="display: block;">向下滑动刷新...</span>
</div>
<ul id="foodUl">
<c:forEach var="cate" items="${list }" >
${cate.goodstitle }
</c:forEach>
</ul>
<div id="pullUp" style="width:100%;float:left;">
<span class="pullUpIcon"></span><span class="pullUpLabel" style="margin-top:-40px; height: 30px; float:left; width: 100%; text-align: center;">向上滑动加载更多...</span>
</div>
</div>
</div>

第二部：
<script type="text/javascript" src="<%=path %>/js/iscroll.js"></script>

第三部：
/* 滑动 */
#wrapper {
position:absolute; z-index:1;
top:45px; bottom:48px; left:auto;
width:100%;
overflow:auto;
}
#myFrame {
position:absolute;
top:0; left:0;
}
/**
*
* Pull down styles
*
*/
#pullDown, #pullUp {
background:#fff;
height:40px;
line-height:40px;
padding:5px 10px;
border-bottom:1px solid #ccc;
font-weight:bold;
font-size:14px;
color:#888;
}
#pullDown .pullDownIcon, #pullUp .pullUpIcon {
display:block; float:left;
width:40px; height:40px;
background:url([e-mail]) 0 0 no-repeat;
-webkit-background-size:40px 80px; background-size:40px 80px;
-webkit-transition-property:-webkit-transform;
-webkit-transition-duration:250ms;
}
#pullDown .pullDownIcon {
-webkit-transform:rotate(0deg) translateZ(0);
}
#pullUp .pullUpIcon {
-webkit-transform:rotate(-180deg) translateZ(0);
}

#pullDown.flip .pullDownIcon {
-webkit-transform:rotate(-180deg) translateZ(0);
}

#pullUp.flip .pullUpIcon {
-webkit-transform:rotate(0deg) translateZ(0);
}

#pullDown.loading .pullDownIcon, #pullUp.loading .pullUpIcon {
background-position:0 100%;
-webkit-transform:rotate(0deg) translateZ(0);
-webkit-transition-duration:0ms;

-webkit-animation-name:loading;
-webkit-animation-duration:2s;
-webkit-animation-iteration-count:infinite;
-webkit-animation-timing-function:linear;
}

@-webkit-keyframes loading {
from { -webkit-transform:rotate(0deg) translateZ(0); }
to { -webkit-transform:rotate(360deg) translateZ(0); }
}

第四部：
var myScroll,
pullDownEl, pullDownOffset,
pullUpEl, pullUpOffset,
generatedCount = 0;
//计算pageSize
var pageSize = 0;
//初始化
$(document).ready(function() { $(".rating-kv").rating();

pageSize = $("#pageSize").val();
loaded();

document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);
document.addEventListener('DOMContentLoaded', function () { setTimeout(loaded, 200); }, false);
});

//加载
function loaded() {
pullDownEl = document.getElementById('pullDown');
pullDownOffset = pullDownEl.offsetHeight;
pullUpEl = document.getElementById('pullUp');
pullUpOffset = pullUpEl.offsetHeight;

myScroll = new iScroll('wrapper', {
useTransition: true,
topOffset: pullDownOffset,
onRefresh: function () {
if (pullDownEl.className.match('loading')) {
pullDownEl.className = '';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '向下滑动刷新...';
} else if (pullUpEl.className.match('loading')) {
pullUpEl.className = '';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '向上滑动加载更多...';
}
},
onScrollMove: function () {
if (this.y > 5 && !pullDownEl.className.match('flip')) {
pullDownEl.className = 'flip';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Release to refresh...';
this.minScrollY = 0;
} else if (this.y < 5 && pullDownEl.className.match('flip')) {
pullDownEl.className = '';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '向下滑动刷新...';
this.minScrollY = -pullDownOffset;
} else if (this.y < (this.maxScrollY - 5) && !pullUpEl.className.match('flip')) {
pullUpEl.className = 'flip';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '松开...';
this.y = this.maxScrollY;
} else if (this.y > (this.maxScrollY + 5) && pullUpEl.className.match('flip')) {
pullUpEl.className = '';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '向上滑动加载更多...';
this.maxScrollY = pullUpOffset;
}
},
onScrollEnd: function () {
if (pullDownEl.className.match('flip')) {
pullDownEl.className = 'loading';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Loading...';
pullDownAction(); // Execute custom function (ajax call?)
} else if (pullUpEl.className.match('flip')) {
pullUpEl.className = 'loading';
pullUpEl.querySelector('.pullUpLabel').innerHTML = 'Loading...';
pullUpAction(); // Execute custom function (ajax call?)
}
}
});

setTimeout(function () { document.getElementById('wrapper').style.left = '0'; }, 800);
}

//向下滑动
function pullDownAction () {
setTimeout(function () { // <-- Simulate network congestion, remove setTimeout from production!
$.ajax({
type:"post",
url: ,
data:downObj,
success:function(iRet){
var ct= (new Function("", "return " + iRet))();
if(null != iRet && "" != iRet && null != ct){

//先清空ul
$("#foodUl").html("");

//append拼接下一页数据 }
}
});

myScroll.refresh(); // Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}

//向上滑动
function pullUpAction () {
setTimeout(function () { // <-- Simulate network congestion, remove setTimeout from production!

//计算起始条数
var tonum = parseInt($("#tonum").val()) + parseInt(pageSize);
$("#fromnum").val(parseInt($("#tonum").val()) + parseInt(1));
$("#tonum").val(tonum);

$.ajax({
type:"post",
url: ,
data:upObj,
success:function(iRet){
var ct= (new Function("", "return " + iRet))();
if(null != ct){
//append拼接下一页数据
}else{
var tnum = parseInt($("#fromnum").val()) - parseInt(pageSize);

$("#tonum").val(parseInt($("#fromnum").val())- parseInt(1));
$("#fromnum").val(tnum);

$(".pullUpLabel").html("无更多数据");
}
}
});

myScroll.refresh(); // Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}