zoukankan html css js c++ java

基于iscroll.js实现下拉刷新和上拉加载特效

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：

这里写图片描述

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;
            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;
            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;
            100%;
            background:#555;
            overflow:auto;
        }

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

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

        #scroller ul {
            position:relative;
            list-style:none;
            padding:0;
            margin:0;
            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;
            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：

这里写图片描述

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~~

这里写图片描述

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>

这么多代码看毛啊，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：

这里写图片描述

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：

这里写图片描述

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;
            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;
            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;
            100%;
            background:#555;
            overflow:auto;
        }

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

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

        #scroller ul {
            position:relative;
            list-style:none;
            padding:0;
            margin:0;
            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;
            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>

所有资料下载地址：
把资料上传github太麻烦，上传csdn审核都要好几天，不如来点最老土的办法，我把上面源码资料放在web学习交流QQ群中：237053693

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原文地址：https://www.cnblogs.com/libin-1/p/6099083.html