原文網址：http://www.cnblogs.com/theroad/p/5397229.html
使用js框架是PhotoSwipe。

PhotoSwipe是一個圖片放大插件，兼容pc和移動端，經歷過多個版本的迭代且一直在不斷更新，踩過的坑不知凡幾，在移動端有著巨大的優勢。
1、可控制多種風格如：
標題、分享、全屏按鈕，點擊事件、是否加入字幕，背景透明等。
2、可支持移動端觸摸手勢兼容pc端
所有的基本手勢支持：滑動下一個或上一個，拖動平移、縮放、放大或關閉，點擊切換控件，雙擊放大或縮放。
3、分享
默認的UI有一個按鈕，分享鏈接。默認的鏈接是facebook，推特和Pinterest，但你可以通過API設置分享類型。
4、用戶界面
用戶界面是完全從核心腳本分離。完全可以自定義界面。默認photoswipe UI是響應式的，桌面、平板電腦和移動設備完全可以使用。

5、更多功能等你發現。

官網：http://photoswipe.com/

github：https://github.com/dimsemenov/photoswipe

如何使用？
1、在官網下載PhotoSwipe，在頁面中引入

<link rel="stylesheet prefetch" href="css/photoswipe.css"> <link rel="stylesheet prefetch" href="css/default-skin/default-skin.css"> <script src="js/photoswipe.js"></script> <script src="js/photoswipe-ui-default.min.js"></script>

注：prefetch規定應該對目標文檔進行緩存。

2、頁面中必須加入以下代碼結構（此結構是插件圖片瀏覽必須代碼，作者并沒有集成到js中，所以使用者必須手動加入自己的網頁中）：

<!-- Root element of PhotoSwipe. Must have class pswp. --> <div class="pswp" tabindex="-1" role="dialog" aria-hidden="true"><!-- Background of PhotoSwipe. It's a separate element as animating opacity is faster than rgba(). --><div class="pswp__bg"></div><!-- Slides wrapper with overflow:hidden. --><div class="pswp__scroll-wrap"><!-- Container that holds slides. PhotoSwipe keeps only 3 of them in the DOM to save memory.Don't modify these 3 pswp__item elements, data is added later on. --><div class="pswp__container"><div class="pswp__item"></div><div class="pswp__item"></div><div class="pswp__item"></div></div><!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. --><div class="pswp__ui pswp__ui--hidden"><div class="pswp__top-bar"><!-- Controls are self-explanatory. Order can be changed. --><div class="pswp__counter"></div><button class="pswp__button pswp__button--close" title="Close (Esc)"></button><button class="pswp__button pswp__button--share" title="Share"></button><button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button><button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button><!-- element will get class pswp__preloader--active when preloader is running --><div class="pswp__preloader"><div class="pswp__preloader__icn"><div class="pswp__preloader__cut"><div class="pswp__preloader__donut"></div></div></div></div></div><div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap"><div class="pswp__share-tooltip"></div> </div><button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)"></button><button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)"></button><div class="pswp__caption"><div class="pswp__caption__center"></div></div></div></div></div>

3、需要瀏覽的圖片加入photoswipe結構代碼，這里需要注意的是
data-pswp-uid在每個相冊中必須是唯一的，data-size是指定放大時圖片顯示的寬和高，若指定的寬高與圖片不符會導致顯示的圖片變形；目前還沒找到去掉
data-size的辦法，但然有時間可以找下替代辦法。

<!--data-pswp-uid在每個相冊中必須是唯一的，data-size指定放大時圖片顯示的寬和高--> <div class="my-gallery" data-pswp-uid="1"><figure><a href="img/m3.jpg" data-size="670x712"><img src="img/th1.jpg"></a></figure> </div>

4、加入js代碼，此代碼作者也沒有集成到photoswipe框架中，需要自己手動加入網頁里

<script type="text/javascript">var initPhotoSwipeFromDOM = function(gallerySelector) {// 解析來自DOM元素幻燈片數據（URL，標題，大小...）// (children of gallerySelector)var parseThumbnailElements = function(el) {var thumbElements = el.childNodes,numNodes = thumbElements.length,items = [],figureEl,linkEl,size,item;for(var i = 0; i < numNodes; i++) {figureEl = thumbElements[i]; // <figure> element// 僅包括元素節點if(figureEl.nodeType !== 1) {continue;} 25 linkEl = figureEl.children[0]; // <a> elementsize = linkEl.getAttribute('data-size').split('x');// 創建幻燈片對象item = {src: linkEl.getAttribute('href'),w: parseInt(size[0], 10),h: parseInt(size[1], 10)};if(figureEl.children.length > 1) {// <figcaption> contentitem.title = figureEl.children[1].innerHTML; }if(linkEl.children.length > 0) {// <img> 縮略圖節點, 檢索縮略圖網址item.msrc = linkEl.children[0].getAttribute('src');} item.el = figureEl; // 保存鏈接元素 for getThumbBoundsFnitems.push(item);}return items;};// 查找最近的父節點var closest = function closest(el, fn) {return el && ( fn(el) ? el : closest(el.parentNode, fn) );};// 當用戶點擊縮略圖觸發var onThumbnailsClick = function(e) {e = e || window.event;e.preventDefault ? e.preventDefault() : e.returnValue = false;var eTarget = e.target || e.srcElement;// find root element of slidevar clickedListItem = closest(eTarget, function(el) {return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');});if(!clickedListItem) {return;}// find index of clicked item by looping through all child nodes// alternatively, you may define index via data- attributevar clickedGallery = clickedListItem.parentNode,childNodes = clickedListItem.parentNode.childNodes,numChildNodes = childNodes.length,nodeIndex = 0,index;for (var i = 0; i < numChildNodes; i++) {if(childNodes[i].nodeType !== 1) { continue; }if(childNodes[i] === clickedListItem) {index = nodeIndex;break;}nodeIndex++;}if(index >= 0) {// open PhotoSwipe if valid index foundopenPhotoSwipe( index, clickedGallery );}return false;};// parse picture index and gallery index from URL (#&pid=1&gid=2)var photoswipeParseHash = function() {var hash = window.location.hash.substring(1),params = {};if(hash.length < 5) {return params;}var vars = hash.split('&');for (var i = 0; i < vars.length; i++) {if(!vars[i]) {continue;}var pair = vars[i].split('='); if(pair.length < 2) {continue;} params[pair[0]] = pair[1];}if(params.gid) {params.gid = parseInt(params.gid, 10);}return params;};var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {var pswpElement = document.querySelectorAll('.pswp')[0],gallery,options,items;items = parseThumbnailElements(galleryElement);// 這里可以定義參數options = {barsSize: { top: 100,bottom: 100}, fullscreenEl : false, // 是否支持全屏按鈕shareButtons: [{id:'wechat', label:'分享微信', url:'#'},{id:'weibo', label:'新浪微博', url:'#'},{id:'download', label:'保存圖片', url:'{{raw_image_url}}', download:true}], // 分享按鈕// define gallery index (for URL)galleryUID: galleryElement.getAttribute('data-pswp-uid'),getThumbBoundsFn: function(index) {// See Options -> getThumbBoundsFn section of documentation for more infovar thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnailpageYScroll = window.pageYOffset || document.documentElement.scrollTop,rect = thumbnail.getBoundingClientRect(); return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};}};// PhotoSwipe opened from URLif(fromURL) {if(options.galleryPIDs) {// parse real index when custom PIDs are used for(var j = 0; j < items.length; j++) {if(items[j].pid == index) {options.index = j;break;}}} else {// in URL indexes start from 1options.index = parseInt(index, 10) - 1;}} else {options.index = parseInt(index, 10);}// exit if index not foundif( isNaN(options.index) ) {return;}if(disableAnimation) {options.showAnimationDuration = 0;}// Pass data to PhotoSwipe and initialize itgallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);gallery.init();};// loop through all gallery elements and bind eventsvar galleryElements = document.querySelectorAll( gallerySelector );for(var i = 0, l = galleryElements.length; i < l; i++) {galleryElements[i].setAttribute('data-pswp-uid', i+1);galleryElements[i].onclick = onThumbnailsClick;}// Parse URL and open gallery if it contains #&pid=3&gid=1var hashData = photoswipeParseHash();if(hashData.pid && hashData.gid) {openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1 ], true, true );}};// execute above functioninitPhotoSwipeFromDOM('.my-gallery'); </script>

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