基于iscroll.js实现下拉刷新和上拉加载效果

楼主^#

更多发布于：2018-12-02 19:47

现在已经不是纯Android独霸天下的时代了，H5嵌入Android的Hybrid混合开发是大势所趋。今天给大家带来的就是移动端中常见的“上拉刷新，下拉加载”特效，这个特效将会基于H5来实现。
先看下运行效果：

是不是有点小小的‘鸡冻' ，它就是由我们今天要介绍的主人公‘iscroll.js'实现的，接下来我以最最简便的方式教给大家~~
实现步骤
一、准备好iscroll.js库
到官网下载即可：
https://github.com/cubiq/iscroll
二、搭建页面结构

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沙发^#

发布于：2018-12-02 19:48

<!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 实例：下拉刷新，滚动翻页</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;
   top:0; left:0;
   width:100%;
   height:45px;
   line-height:45px;
   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;
   bottom:0; left:0;
   width:100%;
   height:48px;
   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:0;
   width:100%;
   background:#555;
   overflow:auto;
  }

  #scroller {
   position:relative;
  /* -webkit-touch-callout:none;*/
   -webkit-tap-highlight-color:rgba(0,0,0,0);

   float:left;
   width:100%;
   padding:0;
  }

  #scroller ul {
   position:relative;
   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;
  }

  #scroller li > a {
   display:block;
  }

  /**
   *
   * 下拉样式 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);
  }

</style>
</head>
<body>
<div id="header">
  <a href="../db.html#page2">iScroll实例：下拉刷新，滚动翻页</a>
</div>

<div id="wrapper">
  <div id="scroller">

   <div id="pullDown">
   <span class="pullDownIcon"></span><span class="pullDownLabel">下拉刷新...</span>
   </div>

   <ul id="thelist">
   <li>我是三冰 1</li>
   <li>我是三冰 2</li>
   <li>我是三冰 3</li>
   <li>我是三冰 4</li>
   <li>我是三冰 5</li>
   <li>我是三冰 6</li>
   <li>我是三冰 7</li>
   <li>我是三冰 8</li>
   <li>我是三冰 9</li>
   <li>我是三冰 10</li>
   <li>我是三冰 11</li>
   <li>我是三冰 12</li>
   <li>我是三冰 13</li>
   </ul>

   <div id="pullUp">
   <span class="pullUpIcon"></span><span class="pullUpLabel">上拉加载更多...</span>
   </div>

  </div>
</div>

<div id="footer"></div>
</body>
</html>

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板凳^#

发布于：2018-12-02 19:49

代码非常简单，无需多言，仅仅搭建一个静态结构而已~~
效果如下：

对照这个效果图看上面代码简直太easy，暂时与iscroll没有半毛钱关系，就是纯静态页面，此时你们唯一没有就是下面这个小图标，不用着急，文章最后会给到你的~~

二、完整Js代码

<script type="application/javascript" src="iscroll.js"></script>

<script type="text/javascript">

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 () { // <-- 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 = '添加三冰 ' + (++generatedCount);
   el.insertBefore(li, el.childNodes[0]);
  }

  myScroll.refresh(); //数据加载完成后，调用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}

/**
* 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 = '添加三冰 ' + (++generatedCount);
   el.appendChild(li, el.childNodes[0]);
  }

  myScroll.refresh(); // 数据加载完成后，调用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}

/**
* 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', /* 重要样式 */
  useTransition: false, /* 此属性不知用意，本人从true改为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(); // Execute custom function (ajax call?)
   } else if (pullUpEl.className.match('flip')) {
   pullUpEl.className = 'loading';
   pullUpEl.querySelector('.pullUpLabel').innerHTML = '加载中...';
   pullUpAction(); // Execute custom function (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);

</script>

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地板^#

发布于：2018-12-02 19:50

这么多代码看啊，不用着急，挑几个重点给你说说：
1）onRefresh函数是指页面刷新或调用refresh()函数会触发此函数，里面代码中主要做【一些重置样式和文字】的处理。
2）onScrollMove函数是指拖拽页面，不松手的时候会触发此函数，里面代码中主要做【箭头有个旋转效果和松手提示】的处理。
3）onScrollEnd函数是指松开手，停止拖拽的时候会触发的函数，里面代码中主要做【刷新数据和一些加载动画效果】的处理。
4）topOffset属性主要是可以隐藏一个高度，正好把下拉刷新给隐藏掉
5）函数pullDownAction和pullUpAction中，我是自己用createElement函数造数据，但是真实开发中，这里可以换成Ajax请求服务器数据即可
看看现在的效果如何：

现在数据什么的都能刷新了，只差那么一点点，如果下拉和上拉的时候，加载的小图标有个动画效果那就超级“完美”了：
既然是要来点动画效果，肯定是用最新的CSS3技术呀，废话不多说，直接贴完整代码了：

<!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 实例：下拉刷新，滚动翻页</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;
   top:0; left:0;
   width:100%;
   height:45px;
   line-height:45px;
   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;
   bottom:0; left:0;
   width:100%;
   height:48px;
   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:0;
   width:100%;
   background:#555;
   overflow:auto;
  }

  #scroller {
   position:relative;
  /* -webkit-touch-callout:none;*/
   -webkit-tap-highlight-color:rgba(0,0,0,0);

   float:left;
   width:100%;
   padding:0;
  }

  #scroller ul {
   position:relative;
   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;
  }

  #scroller li > a {
   display:block;
  }

  /**
   *
   * 下拉样式 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);
  }

  /**
   * 动画效果css3代码
   */
  #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="../db.html#page2">iScroll实例：下拉刷新，滚动翻页</a>
</div>

<div id="wrapper">
  <div id="scroller">

   <div id="pullDown">
   <span class="pullDownIcon"></span><span class="pullDownLabel">下拉刷新...</span>
   </div>

   <ul id="thelist">
   <li>我是三冰 1</li>
   <li>我是三冰 2</li>
   <li>我是三冰 3</li>
   <li>我是三冰 4</li>
   <li>我是三冰 5</li>
   <li>我是三冰 6</li>
   <li>我是三冰 7</li>
   <li>我是三冰 8</li>
   <li>我是三冰 9</li>
   <li>我是三冰 10</li>
   <li>我是三冰 11</li>
   <li>我是三冰 12</li>
   <li>我是三冰 13</li>
   </ul>

   <div id="pullUp">
   <span class="pullUpIcon"></span><span class="pullUpLabel">上拉加载更多...</span>
   </div>

  </div>
</div>

<div id="footer"></div>

<script type="application/javascript" src="iscroll.js"></script>

<script type="text/javascript">

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 () { // <-- 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 = '添加三冰 ' + (++generatedCount);
   el.insertBefore(li, el.childNodes[0]);
  }

  myScroll.refresh(); //数据加载完成后，调用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}

/**
* 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 = '添加三冰 ' + (++generatedCount);
   el.appendChild(li, el.childNodes[0]);
  }

  myScroll.refresh(); // 数据加载完成后，调用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}

/**
* 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', /* 重要样式 */
  useTransition: false, /* 此属性不知用意，本人从true改为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(); // Execute custom function (ajax call?)
   } else if (pullUpEl.className.match('flip')) {
   pullUpEl.className = 'loading';
   pullUpEl.querySelector('.pullUpLabel').innerHTML = '加载中...';
   pullUpAction(); // Execute custom function (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);

</script>
</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。

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gogogo 管理员 UID25 粉丝0 关注0 发帖数1377 加关注写私信	4楼^# 发布于：2018-12-02 19:50 转自：https://www.jb51.net/article/98394.htm
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基于iscroll.js实现下拉刷新和上拉加载效果

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