基於iscroll.js實現下拉刷新和上拉加載特效

時間 2019-11-12

標籤基於 iscroll.js iscroll 實現下拉刷新加載特效欄目 JavaScript 简体版

原文原文鏈接

如今已經不是純Android獨霸天下的時代了，H5嵌入Android的Hybrid混合開發是大勢所趨。今天給你們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。javascript

先看下運行效果：css

是否是有點小小的‘雞凍’ ，它就是由咱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你們~~html

實現步驟

1、準備好iscroll.js庫java

到官網下載便可：
https://github.com/cubiq/iscrollandroid

2、搭建頁面結構css3

<!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>

代碼很是簡單，無需多言，僅僅搭建一個靜態結構而已~~git

效果以下：github

對照這個效果圖看上面代碼簡直太easy，暫時與iscroll沒有半毛錢關係，就是純靜態頁面，此時大家惟一沒有就是下面這個小圖標，不用着急，文章最後會給到你的~~web

2、完整Js代碼ajax

<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改成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 = '鬆手開始更新...'; 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 = '鬆手開始更新...'; 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>

這麼多代碼看毛啊，不用着急，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，裏面代碼中主要作【一些重置樣式和文字】的處理。

2）onScrollMove函數是指拖拽頁面，不鬆手的時候會觸發此函數，裏面代碼中主要作【箭頭有個旋轉效果和鬆手提示】的處理。

3）onScrollEnd函數是指鬆開手，中止拖拽的時候會觸發的函數，裏面代碼中主要作【刷新數據和一些加載動畫效果】的處理。

4）topOffset屬性主要是能夠隱藏一個高度，正好把下拉刷新給隱藏掉

5）函數pullDownAction和pullUpAction中，我是本身用createElement函數造數據，可是真實開發中，這裏能夠換成Ajax請求服務器數據便可

看看如今的效果如何：

如今數據什麼的都能刷新了，只差那麼一點點，若是下拉和上拉的時候，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，確定是用最新的CSS3技術呀，廢話很少說，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改成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 = '鬆手開始更新...'; 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 = '鬆手開始更新...'; 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>

全部資料下載地址：
把資料上傳github太麻煩，上傳csdn審覈都要好幾天，不如來點最老土的辦法，我把上面源碼資料放在web學習交流QQ羣中：237053693

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