移动端使用photoswipe实现图片放大

姚智

2023-12-01

PhotoSwipe插件官方网站 http://www.photoswipe.com/

页面中需要引入如下文件：photoswipe.css，default-skin.css，photoswipe.js，photoswipe-ui-default.min.js

html部分

这段代码用于显示放大图片

html部分

<div class="my-gallery" data-pswp-uid="1">
     <figure>
         <div class="img-dv"><a href="img/img1-big.jpg" data-size="1920x1080"><img src="img/img1.jpg"></a></div>
         <figcaption style="display:none;">在这里可增加图片描述</figcaption>
     </figure>
</div>

完整代码

<!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 rel="stylesheet prefetch" href="css/photoswipe.css">
<link rel="stylesheet prefetch" href="css/default-skin/default-skin.css">
<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>

<div class="my-gallery" data-pswp-uid="1">
<figure>
<div class="img-dv"><a href="img/img1-big.jpg" data-size="1920x1080"><img src="img/img1.jpg"></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="img/img2-big.jpg" data-size="1920x1080"><img src="img/img2.jpg"></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="img/img3-big.jpg" data-size="1920x1080"><img src="img/img3.jpg"></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="img/img4-big.jpg" data-size="1920x1080"><img src="img/img4.jpg"></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="img/img5-big.jpg" data-size="1920x1080"><img src="img/img5.jpg"></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--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 src="js/photoswipe.js"></script>
<script src="js/photoswipe-ui-default.min.js"></script>
<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 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>

如果页面有定位的div，注意层级，不然图片点击不是全屏。

移动端使用photoswipe实现图片放大

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