PhotoSwipe 图片浏览插件使用方法

一、简介

PhotoSwipe 是专为移动触摸设备设计的相册/画廊.兼容所有iPhone、iPad、黑莓6+,以及桌面浏览器.底层实现基于HTML/CSS/JavaScript,是一款免费开源的相册产品。

官方网站：http://photoswipe.com/ 
源码下载：https://github.com/dimsemenov/photoswipe 
国内CDN：http://www.bootcdn.cn/photoswipe/

二、使用

1、新建html页面，如果是移动端看的话，需要在页面头部插入视口说明：

<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no">

2、引入 photoswipe.css、default-skin.css 文件，引入 photoswipe.js、photoswipe-ui-default.js 文件。

<link href="http://cdn.bootcss.com/photoswipe/4.1.1/photoswipe.css" rel="stylesheet">
<link href="http://cdn.bootcss.com/photoswipe/4.1.1/default-skin/default-skin.css" rel="stylesheet">
<script src="http://cdn.bootcss.com/photoswipe/4.1.1/photoswipe.js"></script>
<script src="http://cdn.bootcss.com/photoswipe/4.1.1/photoswipe-ui-default.js"></script>

3、必要的HTML结构

<div class="repairImgList lightgallery" data-pswp-uid="1" id="PhotoSwipe-demo">
	<figure>
		<div>
			<a href="http://192.168.0.99:9090/wyglFile/images/overhaul/03d1150a24a74e87ba89f689f1c374a7-20160328110004.jpg" data-size="640x1136"><img src="http://192.168.0.99:9090/wyglFile/images/overhaul/03d1150a24a74e87ba89f689f1c374a7-20160328110004.jpg"></a>
		</div>
	</figure>
	<figure>
		<div>
			<a href="http://192.168.0.99:9090/wyglFile/images/overhaul/03d1150a24a74e87ba89f689f1c374a7-20160328110004.jpg" data-size="640x1136"><img src="http://192.168.0.99:9090/wyglFile/images/overhaul/03d1150a24a74e87ba89f689f1c374a7-20160328110004.jpg"></a>
		</div>
	</figure>
</div>

4、必要的启动代码

<!-- 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 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>
				<!-- 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>

这部分代码是相册组成的基本代码，由于PhotoSwipe没有集成到JS里面，所以需要手动的添加到body内，当然也可以采用JS方式把HTML代码拼接进去，我这里已经接好了，见下面JS：

var gelleryHtml = "";
gelleryHtml += "<div id='gallery' class='pswp' tabindex='-1' role='dialog' aria-hidden='true'>";
gelleryHtml += "<div class='pswp__bg'></div>";
gelleryHtml += "<div class='pswp__scroll-wrap'>";
gelleryHtml += "<div class='pswp__container'>";
gelleryHtml += "<div class='pswp__item'></div>";
gelleryHtml += "<div class='pswp__item'></div>";
gelleryHtml += "<div class='pswp__item'></div>";
gelleryHtml += "</div>";
gelleryHtml += "<div class='pswp__ui pswp__ui--hidden'>";
gelleryHtml += "<div class='pswp__top-bar'>";
gelleryHtml += "<div class='pswp__counter'></div>";
gelleryHtml += "<button class='pswp__button pswp__button--close' title='Close (Esc)'></button>";
gelleryHtml += "<button class='pswp__button pswp__button--share' title='Share' style='display:none'></button>";
gelleryHtml += "<button class='pswp__button pswp__button--fs' title='Toggle fullscreen'></button>";
gelleryHtml += "<button class='pswp__button pswp__button--zoom' title='Zoom in/out'></button>";
gelleryHtml += "<div class='pswp__preloader'>";
gelleryHtml += "<div class='pswp__preloader__icn'>";
gelleryHtml += "<div class='pswp__preloader__cut'>";
gelleryHtml += "<div class='pswp__preloader__donut'></div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "<div class='pswp__share-modal pswp__share-modal--hidden pswp__single-tap'>";
gelleryHtml += "<div class='pswp__share-tooltip'>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "<button class='pswp__button pswp__button--arrow--left' title='Previous (arrow left)'></button>";
gelleryHtml += "<button class='pswp__button pswp__button--arrow--right' title='Next (arrow right)'></button>";
gelleryHtml += "<div class='pswp__caption'>";
gelleryHtml += "<div class='pswp__caption__center'>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
gelleryHtml += "</div>";
$(function() {
	$('body').append(gelleryHtml);
})

5、最后，加上必要的启动代码：

var initPhotoSwipeFromDOM = function(gallerySelector) {

    // 解析来自DOM元素幻灯片数据（URL，标题，大小...）
    // (children of gallerySelector)
    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

            // 仅包括元素节点
            if (figureEl.nodeType !== 1) {
                continue;
            }
            divEl = figureEl.children[0];
            linkEl = divEl.children[0]; // <a> element

            size = linkEl.getAttribute('data-size').split('x');

            // 创建幻灯片对象
            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> 缩略图节点, 检索缩略图网址
                item.msrc = linkEl.children[0].getAttribute('src');
            }

            item.el = figureEl; // 保存链接元素 for getThumbBoundsFn
            items.push(item);
        }

        return items;
    };

    // 查找最近的父节点
    var closest = function closest(el, fn) {
        return el && (fn(el) ? el : closest(el.parentNode, fn));
    };

    // 当用户点击缩略图触发
    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);

        // 这里可以定义参数
        options = {
            barsSize: {
                top: 100,
                bottom: 100
            },
            fullscreenEl: false,
            shareButtons: [{
                id: 'wechat',
                label: '分享微信',
                url: '#'
            }, {
                id: 'weibo',
                label: '新浪微博',
                url: '#'
            }, {
                id: 'download',
                label: '保存图片',
                url: '{{raw_image_url}}',
                download: true
            }],

            // 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 
                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);
    }
};

三、DEMO展示及下载

点击下载