基于HTML5上使用iScroll实现下拉刷新，上拉加载更多

var  myScroll, pullDownEl, pullDownOffset, pullUpEl, pullUpOffset, generatedCount = 0;/** * 下拉刷新 （自定义实现此方法） * myScroll.refresh(); 数据加载完成后，调用界面更新方法 */function pullDownAction () { setTimeout(function () {  var el, li, i; el = document.getElementById('thelist'); for (i=0; i<3; i++) { li = document.createElement('li'); li.innerText = 'Generated row ' + (++generatedCount); el.insertBefore(li, el.childNodes[0]); }  myScroll.refresh(); //数据加载完成后，调用界面更新方法  }, 1000); }/** * 滚动翻页 （自定义实现此方法） * myScroll.refresh(); // 数据加载完成后，调用界面更新方法 */function pullUpAction () { setTimeout(function () { // <-- Simulate network congestion, remove setTimeout from production! var el, li, i; el = document.getElementById('thelist'); for (i=0; i<3; i++) { li = document.createElement('li'); li.innerText = 'Generated row ' + (++generatedCount); el.appendChild(li, el.childNodes[0]); }  myScroll.refresh(); //数据加载完成后，调用界面更新方法  }, 1000); }/** * 初始化iScroll控件 */function loaded() { pullDownEl = document.getElementById('pullDown'); pullDownOffset = pullDownEl.offsetHeight; pullUpEl = document.getElementById('pullUp');  pullUpOffset = pullUpEl.offsetHeight;  myScroll = new iScroll('wrapper', { scrollbarClass: 'myScrollbar',  useTransition: false,  topOffset: pullDownOffset, onRefresh: function () { if (pullDownEl.className.match('loading')) { pullDownEl.className = ''; pullDownEl.querySelector('.pullDownLabel').innerHTML = '下拉刷新...'; } else if (pullUpEl.className.match('loading')) { pullUpEl.className = ''; pullUpEl.querySelector('.pullUpLabel').innerHTML = '上拉加载更多...'; } }, onScrollMove: function () { if (this.y > 5 && !pullDownEl.className.match('flip')) { pullDownEl.className = 'flip'; pullDownEl.querySelector('.pullDownLabel').innerHTML = '松手开始更新...'; this.minScrollY = 0; } else if (this.y < 5 && pullDownEl.className.match('flip')) { pullDownEl.className = ''; pullDownEl.querySelector('.pullDownLabel').innerHTML = '下拉刷新...'; this.minScrollY = -pullDownOffset; } else if (this.y < (this.maxScrollY - 5) && !pullUpEl.className.match('flip')) { pullUpEl.className = 'flip'; pullUpEl.querySelector('.pullUpLabel').innerHTML = '松手开始更新...'; this.maxScrollY = this.maxScrollY; } else if (this.y > (this.maxScrollY + 5) && pullUpEl.className.match('flip')) { pullUpEl.className = ''; pullUpEl.querySelector('.pullUpLabel').innerHTML = '上拉加载更多...'; this.maxScrollY = pullUpOffset; } }, onScrollEnd: function () { if (pullDownEl.className.match('flip')) { pullDownEl.className = 'loading'; pullDownEl.querySelector('.pullDownLabel').innerHTML = '加载中...';  pullDownAction(); // ajax call } else if (pullUpEl.className.match('flip')) { pullUpEl.className = 'loading'; pullUpEl.querySelector('.pullUpLabel').innerHTML = '加载中...';  pullUpAction(); // ajax call } } });  setTimeout(function () { document.getElementById('wrapper').style.left = '0'; }, 800);}//初始化绑定iScroll控件 document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);document.addEventListener('DOMContentLoaded', loaded, false);