python 2.7 Django 1.6.1 photoswipe
对于前端的照片存储，已经在前一篇博文中进行展示，使用的是dropzone.js的包，图片存储的作用就是为了数据的再调用，所以在此片进行上次图片的前端展示，因为我是个前端萌新，所以方法比较稚嫩，希望观众老爷不要嘲笑，多多指教咯。
如何上传图片并保存请看：dropzone拖拽图片上传并保存到本地
样式的选择和调试请参考这里，非常好用—photoswipe教程事例
html
<!-- 开辟图片展示空间 --> <div class="my-gallery" itemscope id="img_show" style="overflow-x: hidden;height:290px;"></div> <!-- 引入js包和css样式 --> <script type="text/javascript" src="/media/PhotoSwipe-master/dist/photoswipe.min.js"></script> <script src="/media/PhotoSwipe-master/dist/photoswipe-ui-default.min.js"></script> <link rel="stylesheet" href="/media/PhotoSwipe-master/dist/photoswipe.css"> <link rel="stylesheet" href="/media/PhotoSwipe-master/dist/default-skin/default-skin.css"> <!-- 官方教程中的代码 --> <!-- 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 slides in 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> <!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR --> <!-- 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> //根据官方教程，这里的style不管写在哪都可以调用，因为class名字比较独特吧 <style> .my-gallery { width: 100%; float: left; } .my-gallery img { width: 100%; height: auto; } .my-gallery figure { display: block; float: left; margin: 0 5px 5px 0; width: 150px; } .my-gallery figcaption { display: none; } </style>javascript
<script> //官方的其中一种样式 var initPhotoSwipeFromDOM = function(gallerySelector) { // parse slide data (url, title, size ...) from DOM elements // (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 // include only element nodes if(figureEl.nodeType !== 1) { continue; } linkEl = figureEl.children[0]; // <a> element size = linkEl.getAttribute('data-size').split('x'); // create slide object item = { src: linkEl.getAttribute('href'), w: parseInt(size[0], 10), h: parseInt(size[1], 10) }; if(figureEl.children.length > 1) { // <figcaption> content item.title = figureEl.children[1].innerHTML; } if(linkEl.children.length > 0) { // <img> thumbnail element, retrieving thumbnail url item.msrc = linkEl.children[0].getAttribute('src'); } item.el = figureEl; // save link to element for getThumbBoundsFn items.push(item); } return items; }; // find nearest parent element var closest = function closest(el, fn) { return el && ( fn(el) ? el : closest(el.parentNode, fn) ); }; // triggers when user clicks on thumbnail 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 slide var 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- attribute var 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 found openPhotoSwipe( 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); // define options (if needed) options = { // define gallery index (for URL) galleryUID: galleryElement.getAttribute('data-pswp-uid'), getThumbBoundsFn: function(index) { // See Options -> getThumbBoundsFn section of documentation for more info var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail pageYScroll = window.pageYOffset || document.documentElement.scrollTop, rect = thumbnail.getBoundingClientRect(); return {x:rect.left, y:rect.top + pageYScroll, w:rect.width}; } }; // PhotoSwipe opened from URL if(fromURL) { if(options.galleryPIDs) { // parse real index when custom PIDs are used // http://photoswipe.com/documentation/faq.html#custom-pid-in-url for(var j = 0; j < items.length; j++) { if(items[j].pid == index) { options.index = j; break; } } } else { // in URL indexes start from 1 options.index = parseInt(index, 10) - 1; } } else { options.index = parseInt(index, 10); } // exit if index not found if( isNaN(options.index) ) { return; } if(disableAnimation) { options.showAnimationDuration = 0; } // Pass data to PhotoSwipe and initialize it gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options); gallery.init(); }; // loop through all gallery elements and bind events var 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=1 var hashData = photoswipeParseHash(); if(hashData.pid && hashData.gid) { openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1 ], true, true ); } }; // execute above function initPhotoSwipeFromDOM('.my-gallery'); //这里开始是自己需要写的代码，页面一开始就进行加载 window.onload=img_result(); function img_result(){ var loc = location.href; var n1 = loc.length;//地址的总长度 var n2 = loc.indexOf("=");//取得=号的位置 var order_id = decodeURI(loc.substr(n2+1, n1-n2));//从=号后面的内容 console.log("执行了2"); //根据url写的映射，进入enter这个app然后调用get_case3这个函数进行处理 $.get('/enter/get_case3/', { //前台获取order_id传入后台当做参数 'order_id':order_id, }, //从view.py中的方法可知，产生的data形式是一个list，list元素是dict，里面藏着对应dui'y'n该编号下的图片路径 function(data){ if(data[0]==""){ console.log("为空") } else{ var j=0 // console.log("dropzone") var html_string=''; var aa = data.length; console.log(aa); for(var i=0;i<data.length;i++){ // 获取存在服务器本地文件夹中的图片路径 var newimg = '/media/'+data[i]["img"] console.log(newimg) html_string+='<figure itemprop="associatedMedia" style="height:200px"><a href="'+newimg+'" itemprop="contentUrl" data-size="640x1136" ><img src="'+newimg+'" itemprop="thumbnail" alt="Image description" id="img1_1"/></a><figcaption itemprop="caption description"></figcaption></figure>'; j=j+1; } //比较弱的方法，就是构造html的字符串组，然后添加到id为img_show的空间中 $("#img_show").append(html_string); } }, 'json' ); </script>urls.py
这里构成的是一种前端映射到view的函数比如说，网页的后缀变成了get_case3了，映射的处理的函数指的就是后面的get_case3(完全可以写的不一样，只要找对映射关系就可以了)
urlpatterns = patterns('enter.views', url(r"^get_case3/","get_case3"), )view.py
def get_case3(request): order_id = request.GET.get("order_id","") conn= MySQLdb.connect( host=你的host主机, port = 端口号, user='root', passwd=密码, db =数据库名字, ) cur = conn.cursor() conn.set_character_set('utf8') cur.execute('SET NAMES utf8;') cur.execute('SET CHARACTER SET utf8;') cur.execute('SET character_set_connection=utf8;') # 选择出标号对应的所需要的图 cur.execute("select img from enter_img where order_id='"+order_id+"'") server_info_advance=cur.fetchall() advance_info2=[] for data3 in server_info_advance: dict_result={} dict_result["img"]=data3[0] advance_info2.append(dict_result) advance_info3=[] if len(advance_info2)<100: # return advance_info2 else: return advance_info3model的表现形式
# 数据库名字叫做enter_img +-----+----------+-------------------------------------+ | id | order_id | img | +-----+----------+-------------------------------------+ | 460 | 1234 | upload/1491036872.27WechatIMG2.png | +-----+----------+-------------------------------------+这里回顾下过程，整个流程在于在前端触发一个带返回的id号，之后将这个id号代入后台进行数据库的索引，之后再从后台构造好传递到前端，前端在进行图片展示，photoswipe这个js包的作用就是完成图片比较酷炫展示的作用，其中要注意的是图片尺寸的选择，后续有空需要把自动获取尺寸的代码构造出来，目前如果不是非本分辨率的图片，放大后将呈现出很差的体验效果，后续可能会对图片上传时，对图片尺寸的进行获取和存值，这样再进行调出的时候，效果就会好很多。–来自自学前端三个礼拜的小白的心声
可以参考这里，直接把包导出即可进行本地调试
步骤：右下角export-export.zip ,然后下载到本地愉快的双击index.html即可
关于为啥我把上传图片和展示图片分成两篇来写，，，，，因为，，我懒啊，哈哈哈哈，不闹，片段剥离，有利于重复利用，嗯，就是酱紫
解决问题毕竟还是需要进行复盘和记录，这样对以后的发展和回顾有非常大的益处，构造方法上的选择需要接轨目前主要的方法，对于前后台脱离的团队，需要进行标准的数据传输，前端妹子们可不管后台怎么构造方法，她们只要进行前端页面展示就可以了(然而ui，美工，后台都tm是我写0.0)，后续等我有空闲下来的时间，把整个构建构建工程和app的过程都仔细写一下，从整个项目中剥离出来让纯正小白也可以一下子学会，目前只能当为自己的学习笔记，如果思想对你有所帮助，我也很高兴。共勉
