• 移动端的图片放大


    <!doctype html>
    <html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
        <meta name="apple-mobile-web-app-capable" content="yes">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>photoswipe的使用</title>
        <link href="https://cdn.bootcss.com/photoswipe/4.1.3/photoswipe.css" rel="stylesheet">
        <link href="https://cdn.bootcss.com/photoswipe/4.1.3/default-skin/default-skin.css" rel="stylesheet">
        <script src="https://cdn.bootcss.com/photoswipe/4.1.3/photoswipe.js"></script>
        <script src="https://cdn.bootcss.com/photoswipe/4.1.3/photoswipe-ui-default.min.js"></script>
        <style>
            * {
                margin: 0;
                padding: 0;
            }
    
            .clearfix::before,
            .clearfix::after {
                display: block;
                content: '';
                visibility: hidden;
                height: 100%;
                clear: both;
            }
    
            body {
                padding-top: 2%;
            }
    
            .my-gallery {
                width: 96%;
                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%;
            }
        </style>
    </head>
    <body>
        <!--如果有多个data-pswp-uid 它的值是不能重复的-->
        <div class="my-gallery" data-pswp-uid="1">
            <figure>
                <div class="img-dv"><a href="./startPage/20190501.png" data-size="1920x1080"><img src="./startPage/20190501.png"></a></div>
                <figcaption style="display:none;">在这里可增加图片描述</figcaption>
            </figure>
            <figure>
                <div class="img-dv"><a href="./startPage/20190502.png" data-size="1920x1080"><img src="./startPage/20190502.png"></a></div>
                <figcaption style="display:none;">在这里可增加图片描述2</figcaption>
            </figure>
            <figure>
                <div class="img-dv"><a href="./startPage/20190503.png" data-size="1920x1080"><img src="./startPage/20190503.png"></a></div>
                <figcaption style="display:none;">在这里可增加图片描述3</figcaption>
            </figure>
            <figure>
                <div class="img-dv"><a href="./startPage/20190504.png" data-size="1920x1080"><img src="./startPage/20190504.png"></a></div>
                <figcaption style="display:none;">在这里可增加图片描述4</figcaption>
            </figure>
            <figure>
                <div class="img-dv"><a href="./startPage/20190505.png" data-size="1920x1080"><img src="./startPage/20190505.png"></a></div>
                <figcaption style="display:none;">在这里可增加图片描述5在这里可增加图片描述5在这里可增加图片描述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&#45;&#45;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>
                        <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>
    </body>
    <script type="text/javascript">
        var initPhotoSwipeFromDOM = function (gallerySelector) {
            // 解析来自DOM元素幻灯片数据(URL,标题,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
                    // 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) {
                        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;
                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);
                // 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
                        }
                    ],
                    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();
                        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');
    </script>
    </html>
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  • 原文地址:https://www.cnblogs.com/bao2333/p/10819558.html
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