基于iscroll.js实现下拉刷新和上拉加载效果

2019-11-19 18:48:20

字体：大中小

来源：转载

供稿：网友

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

<!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>

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>

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武林网。

上一篇：Jquery循环截取字符串的方法(多出的字符串处理成"...")

下一篇：正则表达式,替换所有HTML标签的简单实例