現在已經不是純Android獨霸天下的時代了,H5嵌入Android的Hybrid混合開發是大勢所趨。今天給大家帶來的就是移動端中常見的“上拉刷新,下拉加載”特效,這個特效將會基於H5來實現。
先看下運行效果:

是不是有點小小的‘雞凍' ,它就是由我們今天要介紹的主人公‘iscroll.js'實現的,接下來我以最最簡便的方式教給大家~~
實現步驟
一、准備好iscroll.js庫
到官網下載即可:
https://github.com/cubiq/iscroll
二、搭建頁面結構
<!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 實例:下拉刷新,滾動翻頁</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;
}
/**
*
* 下拉樣式 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實例:下拉刷新,滾動翻頁</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">上拉加載更多...</span>
</div>
</div>
</div>
<div id="footer"></div>
</body>
</html>
代碼非常簡單,無需多言,僅僅搭建一個靜態結構而已~~
效果如下:

對照這個效果圖看上面代碼簡直太easy,暫時與iscroll沒有半毛錢關系,就是純靜態頁面,此時你們唯一沒有就是下面這個小圖標,不用著急,文章最後會給到你的~~

二、完整Js代碼
<script type="application/javascript" src="iscroll.js"></script>
<script type="text/javascript">
var myScroll,
pullDownEl, pullDownOffset,
pullUpEl, pullUpOffset,
generatedCount = 0;
/**
* 下拉刷新 (自定義實現此方法)
* myScroll.refresh(); // 數據加載完成後,調用界面更新方法
*/
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(); //數據加載完成後,調用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}
/**
* 滾動翻頁 (自定義實現此方法)
* myScroll.refresh(); // 數據加載完成後,調用界面更新方法
*/
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(); // 數據加載完成後,調用界面更新方法 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', /* 重要樣式 */
useTransition: false, /* 此屬性不知用意,本人從true改為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 = '上拉加載更多...';
}
},
onScrollMove: function () {
if (this.y > 5 && !pullDownEl.className.match('flip')) {
pullDownEl.className = 'flip';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '松手開始更新...';
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 = '松手開始更新...';
this.maxScrollY = this.maxScrollY;
} else if (this.y > (this.maxScrollY + 5) && pullUpEl.className.match('flip')) {
pullUpEl.className = '';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '上拉加載更多...';
this.maxScrollY = pullUpOffset;
}
},
onScrollEnd: function () {
if (pullDownEl.className.match('flip')) {
pullDownEl.className = 'loading';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '加載中...';
pullDownAction(); // Execute custom function (ajax call?)
} else if (pullUpEl.className.match('flip')) {
pullUpEl.className = 'loading';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '加載中...';
pullUpAction(); // Execute custom function (ajax call?)
}
}
});
setTimeout(function () { document.getElementById('wrapper').style.left = '0'; }, 800);
}
//初始化綁定iScroll控件
document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);
document.addEventListener('DOMContentLoaded', loaded, false);
</script>
這麼多代碼看啊,不用著急,挑幾個重點給你說說:
1)onRefresh函數是指頁面刷新或調用refresh()函數會觸發此函數,裡面代碼中主要做【一些重置樣式和文字】的處理。
2)onScrollMove函數是指拖拽頁面,不松手的時候會觸發此函數,裡面代碼中主要做【箭頭有個旋轉效果和松手提示】的處理。
3)onScrollEnd函數是指松開手,停止拖拽的時候會觸發的函數,裡面代碼中主要做【刷新數據和一些加載動畫效果】的處理。
4)topOffset屬性主要是可以隱藏一個高度,正好把下拉刷新給隱藏掉
5)函數pullDownAction和pullUpAction中,我是自己用createElement函數造數據,但是真實開發中,這裡可以換成Ajax請求服務器數據即可
看看現在的效果如何:

現在數據什麼的都能刷新了,只差那麼一點點,如果下拉和上拉的時候,加載的小圖標有個動畫效果那就超級“完美”了:
既然是要來點動畫效果,肯定是用最新的CSS3技術呀,廢話不多說,直接貼完整代碼了:
<!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 實例:下拉刷新,滾動翻頁</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;
}
/**
*
* 下拉樣式 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);
}
/**
* 動畫效果css3代碼
*/
#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實例:下拉刷新,滾動翻頁</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">上拉加載更多...</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 (自定義實現此方法)
* myScroll.refresh(); // 數據加載完成後,調用界面更新方法
*/
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(); //數據加載完成後,調用界面更新方法 Remember to refresh when contents are loaded (ie: on ajax completion)
}, 1000); // <-- Simulate network congestion, remove setTimeout from production!
}
/**
* 滾動翻頁 (自定義實現此方法)
* myScroll.refresh(); // 數據加載完成後,調用界面更新方法
*/
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(); // 數據加載完成後,調用界面更新方法 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', /* 重要樣式 */
useTransition: false, /* 此屬性不知用意,本人從true改為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 = '上拉加載更多...';
}
},
onScrollMove: function () {
if (this.y > 5 && !pullDownEl.className.match('flip')) {
pullDownEl.className = 'flip';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '松手開始更新...';
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 = '松手開始更新...';
this.maxScrollY = this.maxScrollY;
} else if (this.y > (this.maxScrollY + 5) && pullUpEl.className.match('flip')) {
pullUpEl.className = '';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '上拉加載更多...';
this.maxScrollY = pullUpOffset;
}
},
onScrollEnd: function () {
if (pullDownEl.className.match('flip')) {
pullDownEl.className = 'loading';
pullDownEl.querySelector('.pullDownLabel').innerHTML = '加載中...';
pullDownAction(); // Execute custom function (ajax call?)
} else if (pullUpEl.className.match('flip')) {
pullUpEl.className = 'loading';
pullUpEl.querySelector('.pullUpLabel').innerHTML = '加載中...';
pullUpAction(); // Execute custom function (ajax call?)
}
}
});
setTimeout(function () { document.getElementById('wrapper').style.left = '0'; }, 800);
}
//初始化綁定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內容,希望對大家的學習有所幫助,也希望大家多多支持。