移动web HTML5使用photoswipe模仿微信朋友圈图片放大浏览
先来几张效果图:
点击其中一张照片可放大,可支持图片文字描述:
同时支持分享功能:
支持手势放大缩小
使用js框架是PhotoSwipe。
PhotoSwipe是一个图片放大插件,兼容pc和移动端,经历过多个版本的迭代且一直在不断更新,踩过的坑不知凡几,在移动端有着巨大的优势。
1、可控制多种风格如:
标题、分享、全屏按钮,点击事件、是否加入字幕,背景透明等。
2、可支持移动端触摸手势兼容pc端
所有的基本手势支持:滑动下一个或上一个,拖动平移、缩放、放大或关闭,点击切换控件,双击放大或缩放。
3、分享
默认的UI有一个按钮,分享链接。默认的链接是facebook,推特和Pinterest,但你可以通过API设置分享类型。
4、用户界面
用户界面是完全从核心脚本分离。完全可以自定义界面。默认photoswipe UI是响应式的,桌面、平板电脑和移动设备完全可以使用。
5、更多功能等你发现。
官网:http://photoswipe.com/
github:https://github.com/dimsemenov/photoswipe
如何使用?
1、在官网下载PhotoSwipe,在页面中引入
<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>
2、页面中必须加入以下代码结构(此结构是插件图片浏览必须代码,作者并没有集成到js中,所以使用者必须手动加入自己的网页中):
<!-- 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、需要浏览的图片加入photoswipe结构代码,这里需要注意的是
data-pswp-uid在每个相册中必须是唯一的,data-size是指定放大时图片显示的宽和高,若指定的宽高与图片不符会导致显示的图片变形;目前还没找到去掉
data-size的办法,但然有时间可以找下替代办法。
<!--data-pswp-uid在每个相册中必须是唯一的,data-size指定放大时图片显示的宽和高--> <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代码,此代码作者也没有集成到photoswipe框架中,需要自己手动加入网页里
1 <script type="text/javascript"> 2 var initPhotoSwipeFromDOM = function(gallerySelector) { 3 4 // 解析来自DOM元素幻灯片数据(URL,标题,大小...) 5 // (children of gallerySelector) 6 var parseThumbnailElements = function(el) { 7 var thumbElements = el.childNodes, 8 numNodes = thumbElements.length, 9 items = [], 10 figureEl, 11 linkEl, 12 size, 13 item; 15 16 for(var i = 0; i < numNodes; i++) { 17 18 figureEl = thumbElements[i]; // <figure> element 19 20 // 仅包括元素节点 21 if(figureEl.nodeType !== 1) { 22 continue; 23 } 25 linkEl = figureEl.children[0]; // <a> element 26 27 size = linkEl.getAttribute('data-size').split('x'); 28 29 // 创建幻灯片对象 30 item = { 31 src: linkEl.getAttribute('href'), 32 w: parseInt(size[0], 10), 33 h: parseInt(size[1], 10) 34 }; 35 36 37 38 if(figureEl.children.length > 1) { 39 // <figcaption> content 40 item.title = figureEl.children[1].innerHTML; 41 } 42 43 if(linkEl.children.length > 0) { 44 // <img> 缩略图节点, 检索缩略图网址 45 item.msrc = linkEl.children[0].getAttribute('src'); 46 } 47 48 item.el = figureEl; // 保存链接元素 for getThumbBoundsFn 49 items.push(item); 50 } 51 52 return items; 53 }; 54 55 // 查找最近的父节点 56 var closest = function closest(el, fn) { 57 return el && ( fn(el) ? el : closest(el.parentNode, fn) ); 58 }; 59 60 // 当用户点击缩略图触发 61 var onThumbnailsClick = function(e) { 62 e = e || window.event; 63 e.preventDefault ? e.preventDefault() : e.returnValue = false; 64 65 var eTarget = e.target || e.srcElement; 66 67 // find root element of slide 68 var clickedListItem = closest(eTarget, function(el) { 69 return (el.tagName && el.tagName.toUpperCase() === 'FIGURE'); 70 }); 71 72 if(!clickedListItem) { 73 return; 74 } 75 76 // find index of clicked item by looping through all child nodes 77 // alternatively, you may define index via data- attribute 78 var clickedGallery = clickedListItem.parentNode, 79 childNodes = clickedListItem.parentNode.childNodes, 80 numChildNodes = childNodes.length, 81 nodeIndex = 0, 82 index; 83 84 for (var i = 0; i < numChildNodes; i++) { 85 if(childNodes[i].nodeType !== 1) { 86 continue; 87 } 88 89 if(childNodes[i] === clickedListItem) { 90 index = nodeIndex; 91 break; 92 } 93 nodeIndex++; 94 } 95 96 97 98 if(index >= 0) { 99 // open PhotoSwipe if valid index found 100 openPhotoSwipe( index, clickedGallery ); 101 } 102 return false; 103 }; 104 105 // parse picture index and gallery index from URL (#&pid=1&gid=2) 106 var photoswipeParseHash = function() { 107 var hash = window.location.hash.substring(1), 108 params = {}; 109 110 if(hash.length < 5) { 111 return params; 112 } 113 114 var vars = hash.split('&'); 115 for (var i = 0; i < vars.length; i++) { 116 if(!vars[i]) { 117 continue; 118 } 119 var pair = vars[i].split('='); 120 if(pair.length < 2) { 121 continue; 122 } 123 params[pair[0]] = pair[1]; 124 } 125 126 if(params.gid) { 127 params.gid = parseInt(params.gid, 10); 128 } 129 130 return params; 131 }; 132 133 var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) { 134 var pswpElement = document.querySelectorAll('.pswp')[0], 135 gallery, 136 options, 137 items; 138 139 items = parseThumbnailElements(galleryElement); 140 141 // 这里可以定义参数 142 options = { 143 barsSize: { 144 top: 100, 145 bottom: 100 146 }, 147 fullscreenEl : false, // 是否支持全屏按钮 148 shareButtons: [ 149 {id:'wechat', label:'分享微信', url:'#'}, 150 {id:'weibo', label:'新浪微博', url:'#'}, 151 {id:'download', label:'保存图片', url:'{{raw_image_url}}', download:true} 152 ], // 分享按钮 153 154 // define gallery index (for URL) 155 galleryUID: galleryElement.getAttribute('data-pswp-uid'), 156 157 getThumbBoundsFn: function(index) { 158 // See Options -> getThumbBoundsFn section of documentation for more info 159 var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail 160 pageYScroll = window.pageYOffset || document.documentElement.scrollTop, 161 rect = thumbnail.getBoundingClientRect(); 162 163 return {x:rect.left, y:rect.top + pageYScroll, w:rect.width}; 164 } 165 166 }; 167 168 // PhotoSwipe opened from URL 169 if(fromURL) { 170 if(options.galleryPIDs) { 171 // parse real index when custom PIDs are used 172 for(var j = 0; j < items.length; j++) { 173 if(items[j].pid == index) { 174 options.index = j; 175 break; 176 } 177 } 178 } else { 179 // in URL indexes start from 1 180 options.index = parseInt(index, 10) - 1; 181 } 182 } else { 183 options.index = parseInt(index, 10); 184 } 185 186 // exit if index not found 187 if( isNaN(options.index) ) { 188 return; 189 } 190 191 if(disableAnimation) { 192 options.showAnimationDuration = 0; 193 } 194 195 // Pass data to PhotoSwipe and initialize it 196 gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options); 197 gallery.init(); 198 }; 199 200 // loop through all gallery elements and bind events 201 var galleryElements = document.querySelectorAll( gallerySelector ); 202 203 for(var i = 0, l = galleryElements.length; i < l; i++) { 204 galleryElements[i].setAttribute('data-pswp-uid', i+1); 205 galleryElements[i].onclick = onThumbnailsClick; 206 } 207 208 // Parse URL and open gallery if it contains #&pid=3&gid=1 209 var hashData = photoswipeParseHash(); 210 if(hashData.pid && hashData.gid) { 211 openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1 ], true, true ); 212 } 213 }; 214 215 // execute above function 216 initPhotoSwipeFromDOM('.my-gallery'); 217 </script>
加入以上代码即可完成一个图片浏览功能、相册、画廊
为了方便大家直观了解,我做了一个demo出来:
PhotoSwipe4.1.1Demo:http://download.csdn.net/detail/cq371356447/9494081
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