移動端圖片縮放（包括滑動查看）

上一篇文章中的移動端圖片縮放是不包括同時左右滑動查看圖片，可是有些場景須要咱們去實現相似於微信朋友圈的點擊查看圖片的效果。

弊端：photoswipe暫時只能實現iOS端長按出現保存圖片到本地的功能，可是在安卓上卻沒有辦法，暫時還未發現解決，後續會找辦法。若是有找到解決辦法的帥哥美女，能夠留言告訴我一下嗎，謝謝！

 

所須要引入的樣式和js能夠到這裏下載，也可簡單查看頁面展現：

連接：https://pan.baidu.com/s/1y1kqfBVyER8_ldSgHpcgVQ
提取碼：8q0p

 

style樣式：

* {margin: 0;padding: 0;}
.clearfix::before, .clearfix::after {
display: block;
content: '';
visibility: hidden;
height: 100%;
clear: both;
}
body {padding-top: 2%;}
.my-gallery {width:80%;margin: 0 auto;}
.my-gallery .img-dv {width:100%;margin-bottom: 1%;}
.my-gallery .img-dv a {display:block;width:100%;text-align: center}
.my-gallery .img-dv a img {width:100%;}
.pswp__caption{display: none;}

body體代碼：

<!--若是有多個data-pswp-uid 它的值是不能重複的-->
<div class="my-gallery" data-pswp-uid="1">
<figure>
<div class="img-dv"><a href="img/img1.png" data-size=""><img src="img/img1.png"></a></div>
<figcaption style="display:none;">在這裏可增長圖片描述</figcaption>
</figure>
<figure>
<div class="img-dv"><a href="img/img2.png" data-size=""><img src="img/img2.png"></a></div>
<figcaption style="display:none;">在這裏可增長圖片描述2</figcaption>
</figure>
<figure>
<div class="img-dv"><a href="img/img3.png" data-size=""><img src="img/img3.png"></a></div>
<figcaption style="display:none;">在這裏可增長圖片描述3</figcaption>
</figure>
<figure>
<div class="img-dv"><a href="img/img4.png" data-size=""><img src="img/img4.png"></a></div>
<figcaption style="display:none;">在這裏可增長圖片描述4</figcaption>
</figure>
<figure>
<div class="img-dv"><a href="img/img5.png" data-size=""><img src="img/img5.png"></a></div>
<figcaption style="display:none;">在這裏可增長圖片描述5在這裏可增長圖片描述5在這裏可增長圖片描述5</figcaption>
</figure>
</div>

<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">
<div class="pswp__bg"></div>
<div class="pswp__scroll-wrap">
<div class="pswp__container">
<div class="pswp__item"></div>
<div class="pswp__item"></div>
<div class="pswp__item"></div>
</div>
<div class="pswp__ui pswp__ui--hidden">
<div class="pswp__top-bar">
<div class="pswp__counter"></div>
<button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
<button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>
<button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>
<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>

 

script代碼：

$(function(){ imgs();// 根據不一樣屏幕分辨率設置放大以後的圖片寬高 }) // 根據不一樣屏幕分辨率設置放大以後的圖片寬高 function imgs(){ var img_list = $(".img-dv img"); var widthN = document.body.clientWidth;//放在圖片以後的寬度 for(var i=0;i<img_list.length;i++){ var widthO = $(img_list[i]).width(); var heightO = $(img_list[i]).height(); var heightN = parseInt(widthN*heightO/widthO); var data_size = widthN+"x"+heightN $(img_list[i]).parent().attr("data-size",data_size); if(i==img_list.length-1){ photoSwiperInit();//初始化圖片縮放和滑動查看 } } } function photoSwiperInit(){ var initPhotoSwipeFromDOM = function(gallerySelector) { // 解析來自DOM元素幻燈片數據（URL，標題，大小...） var parseThumbnailElements = function(el) { var thumbElements = el.childNodes, numNodes = thumbElements.length, items = [], figureEl, linkEl, size, item, divEl; for(var i = 0; i < numNodes; i++) { figureEl = thumbElements[i]; // <figure> element // 僅包括元素節點 if(figureEl.nodeType !== 1) { continue; } divEl = figureEl.children[0]; linkEl = divEl.children[0]; // <a> element size = linkEl.getAttribute('data-size').split('x'); // 建立幻燈片對象 item = { src: linkEl.getAttribute('href'), w: parseInt(size[0], 10), h: parseInt(size[1], 10) }; if(figureEl.children.length > 1) { item.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; // 保存連接元素 for getThumbBoundsFn items.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; var clickedListItem = closest(eTarget, function(el) { return (el.tagName && el.tagName.toUpperCase() === 'FIGURE'); }); if(!clickedListItem) { return; } 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) { openPhotoSwipe( index, clickedGallery ); } return false; }; 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); // 這裏能夠定義參數 options = { barsSize: { top: 100, bottom: 100 }, fullscreenEl : false, tapToClose: true,//能夠進行點擊關閉當前圖片 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} ], galleryUID: galleryElement.getAttribute('data-pswp-uid'), getThumbBoundsFn: function(index) { var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail pageYScroll = window.pageYOffset || document.documentElement.scrollTop, rect = thumbnail.getBoundingClientRect(); console.log(thumbnail) return {x:rect.left, y:rect.top + pageYScroll, w:rect.width}; } }; if(fromURL) { if(options.galleryPIDs) { for(var j = 0; j < items.length; j++) { if(items[j].pid == index) { options.index = j; break; } } } else { options.index = parseInt(index, 10) - 1; } } else { options.index = parseInt(index, 10); } if( isNaN(options.index) ) { return; } if(disableAnimation) { options.showAnimationDuration = 0; } gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options); gallery.init(); }; 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; } var hashData = photoswipeParseHash(); if(hashData.pid && hashData.gid) { openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1 ], true, true ); } }; initPhotoSwipeFromDOM('.my-gallery'); }