<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
  <title>html5+css3实现上拉和下拉刷新</title>

  <style type="text/css" media="all">
    body,ul,li {
      padding:0;
      margin:0;
      border:0;
    }

    body {
      font-size:12px;
      -webkit-user-select:none;
      -webkit-text-size-adjust:none;
      font-family:helvetica;
    }

    #header {
      position:absolute; z-index:2;
      top:0; left:0;
      width:100%;
      height:45px;
      line-height:45px;
      background-color:#d51875;
      background-image:-webkit-gradient(linear, 0 0, 0 100%, color-stop(0, #fe96c9), color-stop(0.05, #d51875), color-stop(1, #7b0a2e));
      background-image:-moz-linear-gradient(top, #fe96c9, #d51875 5%, #7b0a2e);
      background-image:-o-linear-gradient(top, #fe96c9, #d51875 5%, #7b0a2e);
      padding:0;
      color:#eee;
      font-size:20px;
      text-align:center;
    }

    #header a {
      color:#f3f3f3;
      text-decoration:none;
      font-weight:bold;
      text-shadow:0 -1px 0 rgba(0,0,0,0.5);
    }

    #footer {
      position:absolute; z-index:2;
      bottom:0; left:0;
      width:100%;
      height:48px;
      background-color:#222;
      background-image:-webkit-gradient(linear, 0 0, 0 100%, color-stop(0, #999), color-stop(0.02, #666), color-stop(1, #222));
      background-image:-moz-linear-gradient(top, #999, #666 2%, #222);
      background-image:-o-linear-gradient(top, #999, #666 2%, #222);
      padding:0;
      border-top:1px solid #444;
    }

    #wrapper {
      position:absolute; z-index:1;
      top:45px; bottom:48px; left:-9999px;
      width:100%;
      background:#aaa;
      overflow:auto;
    }

    #scroller {
      position:absolute; z-index:1;
      /*    -webkit-touch-callout:none;*/
      -webkit-tap-highlight-color:rgba(0,0,0,0);
      width:100%;
      padding:0;
    }

    #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;
    }

    #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(http://statics.webkfa.com/img/pull-icon@2x.png) 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); }
    }

  </style>
</head>
<body>

<div id="header"><a href="http://cubiq.org/iscroll">iScroll</a></div>
<div id="wrapper">
  <div id="scroller">
    <div id="pullDown">
      <span class="pullDownIcon"></span><span class="pullDownLabel">Pull down to refresh...</span>
    </div>

    <ul id="thelist">
      <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>
      <li>Pretty row 21</li>
      <li>Pretty row 22</li>
      <li>Pretty row 23</li>
      <li>Pretty row 24</li>
      <li>Pretty row 25</li>
      <li>Pretty row 26</li>
      <li>Pretty row 27</li>
      <li>Pretty row 28</li>
      <li>Pretty row 29</li>
      <li>Pretty row 30</li>
      <li>Pretty row 31</li>
      <li>Pretty row 32</li>
      <li>Pretty row 33</li>
      <li>Pretty row 34</li>
      <li>Pretty row 35</li>
      <li>Pretty row 36</li>
      <li>Pretty row 37</li>
      <li>Pretty row 38</li>
      <li>Pretty row 39</li>
      <li>Pretty row 40</li>
    </ul>
    <div id="pullUp">
      <span class="pullUpIcon"></span><span class="pullUpLabel">Pull up to refresh...</span>
    </div>
  </div>
</div>
<div id="footer"></div>
<script type="text/javascript" src="/static/js/iscroll.js"></script>

<script type="text/javascript">

  var myScroll,
          pullDownEl,
          pullDownOffset,
          pullUpEl,
          pullUpOffset,
          generatedCount = 0;

  function pullDownAction () {
    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.insertBefore(li, el.childNodes[0]);
      }

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

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

  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 = 'Pull down to refresh...';
        } else if (pullUpEl.className.match('loading')) {
          pullUpEl.className = '';
          pullUpEl.querySelector('.pullUpLabel').innerHTML = 'Pull up to load more...';
        }
      },
      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 = 'Pull down to refresh...';
          this.minScrollY = -pullDownOffset;
        } else if (this.y < (this.maxScrollY - 5) && !pullUpEl.className.match('flip')) {
          pullUpEl.className = 'flip';
          pullUpEl.querySelector('.pullUpLabel').innerHTML = 'Release to refresh...';
          this.maxScrollY = this.maxScrollY;
        } else if (this.y > (this.maxScrollY + 5) && pullUpEl.className.match('flip')) {
          pullUpEl.className = '';
          pullUpEl.querySelector('.pullUpLabel').innerHTML = 'Pull up to load more...';
          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);
  }

  document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);

  document.addEventListener('DOMContentLoaded', function () { setTimeout(loaded, 200); }, false);
</script>
</body>
</html>

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