移动端的图片放大

其他 2019-05-06 14:58:05 阅读次数: 0 
<!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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