現(xiàn)在已經(jīng)不是純Android獨(dú)霸天下的時(shí)代了，H5嵌入Android的Hybrid混合開(kāi)發(fā)是大勢(shì)所趨。今天給大家?guī)?lái)的就是移動(dòng)端中常見(jiàn)的“上拉刷新，下拉加載”特效，這個(gè)特效將會(huì)基于H5來(lái)實(shí)現(xiàn)。
先看下運(yùn)行效果：
是不是有點(diǎn)小小的‘雞凍' ，它就是由我們今天要介紹的主人公‘iscroll.js'實(shí)現(xiàn)的，接下來(lái)我以最最簡(jiǎn)便的方式教給大家~~
實(shí)現(xiàn)步驟
一、準(zhǔn)備好iscroll.js庫(kù)
到官網(wǎng)下載即可：
https://github.com/cubiq/iscroll
二、搭建頁(yè)面結(jié)構(gòu)
<!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(shí)例：下拉刷新，滾動(dòng)翻頁(yè)</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(shí)例：下拉刷新，滾動(dòng)翻頁(yè)</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(jiǎn)單，無(wú)需多言，僅僅搭建一個(gè)靜態(tài)結(jié)構(gòu)而已~~
效果如下：
對(duì)照這個(gè)效果圖看上面代碼簡(jiǎn)直太easy，暫時(shí)與iscroll沒(méi)有半毛錢關(guān)系，就是純靜態(tài)頁(yè)面，此時(shí)你們唯一沒(méi)有就是下面這個(gè)小圖標(biāo)，不用著急，文章最后會(huì)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(shí)現(xiàn)此方法） * myScroll.refresh(); // 數(shù)據(jù)加載完成后，調(diào)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(shù)據(jù)加載完成后，調(diào)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(dòng)翻頁(yè) （自定義實(shí)現(xiàn)此方法） * myScroll.refresh(); // 數(shù)據(jù)加載完成后，調(diào)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(shù)據(jù)加載完成后，調(diào)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(kāi)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(kāi)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>這么多代碼看啊，不用著急，挑幾個(gè)重點(diǎn)給你說(shuō)說(shuō)：
1）onRefresh函數(shù)是指頁(yè)面刷新或調(diào)用refresh()函數(shù)會(huì)觸發(fā)此函數(shù)，里面代碼中主要做【一些重置樣式和文字】的處理。
2）onScrollMove函數(shù)是指拖拽頁(yè)面，不松手的時(shí)候會(huì)觸發(fā)此函數(shù)，里面代碼中主要做【箭頭有個(gè)旋轉(zhuǎn)效果和松手提示】的處理。
3）onScrollEnd函數(shù)是指松開(kāi)手，停止拖拽的時(shí)候會(huì)觸發(fā)的函數(shù)，里面代碼中主要做【刷新數(shù)據(jù)和一些加載動(dòng)畫效果】的處理。
4）topOffset屬性主要是可以隱藏一個(gè)高度，正好把下拉刷新給隱藏掉
5）函數(shù)pullDownAction和pullUpAction中，我是自己用createElement函數(shù)造數(shù)據(jù)，但是真實(shí)開(kāi)發(fā)中，這里可以換成Ajax請(qǐng)求服務(wù)器數(shù)據(jù)即可
看看現(xiàn)在的效果如何：
現(xiàn)在數(shù)據(jù)什么的都能刷新了，只差那么一點(diǎn)點(diǎn)，如果下拉和上拉的時(shí)候，加載的小圖標(biāo)有個(gè)動(dòng)畫效果那就超級(jí)“完美”了：
既然是要來(lái)點(diǎn)動(dòng)畫效果，肯定是用最新的CSS3技術(shù)呀，廢話不多說(shuō)，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(shí)例：下拉刷新，滾動(dòng)翻頁(yè)</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(dòng)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(shí)例：下拉刷新，滾動(dòng)翻頁(yè)</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(shí)現(xiàn)此方法） * myScroll.refresh(); // 數(shù)據(jù)加載完成后，調(diào)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(shù)據(jù)加載完成后，調(diào)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(dòng)翻頁(yè) （自定義實(shí)現(xiàn)此方法） * myScroll.refresh(); // 數(shù)據(jù)加載完成后，調(diào)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(shù)據(jù)加載完成后，調(diào)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(kāi)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(kāi)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?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持武林網(wǎng)。
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