编程 Javascript

基于iscroll.js实现下拉刷新和上拉加载效果

Posted in Javascript onNovember 28, 2016

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：

基于iscroll.js实现下拉刷新和上拉加载效果

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~~

基于iscroll.js实现下拉刷新和上拉加载效果

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：

基于iscroll.js实现下拉刷新和上拉加载效果

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三水点靠木。

基于iscroll.js实现下拉刷新和上拉加载效果

- Author -

我就是三冰

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐

Javascript - HTML的request类

Jan 09 Javascript

图片格式的JavaScript和CSS速查手册

Aug 20 Javascript

Ajax，UTF-8还是GB2312 eval 还是execScript

Nov 13 Javascript

『jQuery』.html(),.text()和.val()的概述及使用

Apr 22 Javascript

JS对select控件option选项的增删改查示例代码

Oct 21 Javascript

jquery实现点击文字可编辑并修改保存至数据库

Apr 15 Javascript

jQuery CSS()方法改变现有的CSS样式

Aug 20 Javascript

javascript去掉代码里面的注释

Jul 24 Javascript

jQuery Ajax实现跨域请求

Jan 21 Javascript

jQuery中用on绑定事件时需注意的事项

Mar 19 Javascript

详解基于mpvue微信小程序下载远程图片到本地解决思路

May 16 Javascript

JQuery插件tablesorter表格排序实现过程解析

May 28 jQuery

正则表达式,替换所有HTML标签的简单实例

Nov 28 #Javascript

基于slideout.js实现移动端侧边栏滑动特效

Nov 28 #Javascript

js实现右键菜单功能

Nov 28 #Javascript

Javascript 判断两个IP是否在同一网段实例代码

Nov 28 #Javascript

详解JS-- 浮点数运算处理

Nov 28 #Javascript

实现隔行换色效果的两种方式【实用】

Nov 27 #Javascript

javascript实现无法关闭的弹框

Nov 27 #Javascript