iscroll实现下拉刷新功能

本文实例为大家分享了Android九宫格图片展示的具体代码，供大家参考，具体内容如下
版本号：iscroll4.2.5.js
iscroll 版本很有关系在线： demo链接有出现白屏的bug,将iscroll版本改成iscroll4.2.5就可以了
html
<!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>iScroll demo: simple</title>

<script type="text/javascript" src="../../src/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>

<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(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" rel="external nofollow" >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>

</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持呐喊教程。
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