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>
View Code

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

 

posted @ 2016-04-17 22:52  在路上的愚人  阅读(103762)  评论(21编辑  收藏  举报