声明：虽然本文章为原创，但是很大部分参考了博客园博主MRxia的一篇iscroll的下拉刷新的实现方式，我个人把demo简化了一下。
实现效果：类似网易新闻加载新闻列表（好吧，我的只能算是基础版，如要添加动图或者css样式或者canvas效果请自行脑补）
外部引入js文件，必须是iscroll-probe.js，这点是很重要的，因为基础版的 iscroll.js 插件并不支持实例化的IScroll对象的on事件绑定，当然还是要引入jQuery简化一下开发
以下是全局的css样式，当然你也可以直接复制过去，前面的是默认的iscroll的demo的样式，后面的pulldown-tips样式是作为绝对定位，当用户下拉不超过40px时显示“下拉刷新”的提示，下拉刷新后会被隐藏起来
<style type="text/css"> * { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } html { -ms-touch-action: none; } body,ul,li { padding: 0; margin: 0; border: 0; } body { font-size: 12px; font-family: ubuntu, helvetica, arial; overflow: hidden; /* this is important to prevent the whole page to bounce */ } #header { position: absolute; z-index: 2; top: 0; left: 0; width: 100%; height: 45px; line-height: 45px; background: #CD235C; padding: 0; color: #eee; font-size: 20px; text-align: center; font-weight: bold; } #footer { position: absolute; z-index: 2; bottom: 0; left: 0; width: 100%; height: 48px; background: #444; padding: 0; border-top: 1px solid #444; } #wrapper { position: absolute; z-index: 1; top: 45px; bottom: 48px; left: 0; width: 100%; background: #ccc; overflow: hidden; } #scroller { position: absolute; z-index: 1; -webkit-tap-highlight-color: rgba(0,0,0,0); width: 100%; -webkit-transform: translateZ(0); -moz-transform: translateZ(0); -ms-transform: translateZ(0); -o-transform: translateZ(0); transform: translateZ(0); -webkit-touch-callout: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; -webkit-text-size-adjust: none; -moz-text-size-adjust: none; -ms-text-size-adjust: none; -o-text-size-adjust: none; text-size-adjust: none; } #scroller ul { list-style: none; padding: 0; margin: 0; width: 100%; text-align: left; } #scroller li { padding: 0 10px; height: 40px; line-height: 40px; border-bottom: 1px solid #ccc; border-top: 1px solid #fff; background-color: #fafafa; font-size: 14px; } #pullDown,#pullUp,.pulldown-tips{ height:40px; line-height:40px; text-align:center; } .pulldown-tips{ position:absolute; top:-40px; left:0; width:100%; } </style>
html结构在默认demo的基础上在scoller里面添加刷新/加载数据提示
<body> <div>iScroll</div> <div> <div> <div><div></div></div> <div>下拉刷新</div> <ul> <li>Pretty row 1</li> <li>Pretty row 2</li> <li>Pretty row 3</li> <li>Pretty row 4</li> <li>Pretty row 5</li> <li>Pretty row 6</li> <li>Pretty row 7</li> <li>Pretty row 8</li> <li>Pretty row 9</li> <li>Pretty row 10</li> <li>Pretty row 11</li> <li>Pretty row 12</li> <li>Pretty row 13</li> <li>Pretty row 14</li> <li>Pretty row 15</li> <li>Pretty row 16</li> <li>Pretty row 17</li> <li>Pretty row 18</li> <li>Pretty row 19</li> <li>Pretty row 20</li> </ul> <div> <div>加载更多</div> </div> </div> </div> <div></div> </body>
js需要说明的是，这里的scroll事件当然不是原生dom的scroll事件，而是IScroll对象的滚动事件，类似touchmove事件，scrollEnd事件也类似touchend事件，在滚动结束后执行
<script type="text/javascript"> function load () { var myScroll, pullDown = $("#pullDown"), pullUp = $("#pullUp"), pullDownLabel = $(".pullDownLabel"), pullUpLabel = $(".pullUpLabel"), container = $('#list'), loadingStep = 0;//加载状态0默认，1显示加载状态，2执行加载数据，只有当为0时才能再次加载，这是防止过快拉动刷新 pullDown.hide(); pullUp.hide(); myScroll = new IScroll("#wrapper", { scrollbars: true, mouseWheel: false, interactiveScrollbars: true, shrinkScrollbars: 'scale', fadeScrollbars: true, scrollY:true, probeType: 2, bindToWrapper:true }); myScroll.on("scroll",function(){ if(loadingStep == 0 && !pullDown.attr("class").match('refresh|loading') && !pullUp.attr("class").match('refresh')){ if(this.y > 40){//下拉刷新操作 $(".pulldown-tips").hide(); pullDown.addClass("refresh").show(); pullDownLabel.text("松手刷新数据"); loadingStep = 1; myScroll.refresh(); }else if(this.y < (this.maxScrollY - 14)){//上拉加载更多 pullUp.addClass("refresh").show(); pullUpLabel.text("正在载入"); loadingStep = 1; pullUpAction(); } } }); myScroll.on("scrollEnd",function(){ if(loadingStep == 1){ if( pullDown.attr("class").match("refresh") ){//下拉刷新操作 pullDown.removeClass("refresh").addClass("loading"); pullDownLabel.text("正在刷新"); loadingStep = 2; pullDownAction(); } } }); function pullDownAction(){ setTimeout(function(){ var li, i; for (i = 0,li = ""; i < 3; i++) { li += "<li>" + "new Add " + new Date().toLocaleString() + " ！" + "</li>"; } container.prepend(li); pullDown.attr('class','').hide(); myScroll.refresh(); loadingStep = 0; $(".pulldown-tips").show(); },1000); } function pullUpAction(){ setTimeout(function(){ var li, i; for (i = 0,li = ""; i < 3; i++) { li += "<li>" + "new Add " + new Date().toLocaleString() + " ！" + "</li>"; } container.append(li); pullUp.attr('class','').hide(); myScroll.refresh(); loadingStep = 0; },1000); } document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false); } </script>
如有出错，欢迎指正 PS：测试环境在firefox的响应式开发环境下运行