找到了3款图片预览插件进行了比较， 主要是用在移动端
Viewer 官网
Viewer 支持手机端和PC端， 有JQuery版本和js版本， 手势放大缩小不太好用，他是固定比例的
photoswipe 官网
photoswipe 支持手机端和PC端, github有1.5K star， 这个配置很复杂，在移动端体验上不太好。
mui 官网
mui 一个前端框架，图片预览支持手机端和PC端, github接近7.3k star。 使用感觉后比前2个好用, mui是基于移动端框架的，更接近原生
mui demo 我已经详细写了注释了，应该很好理解
或者扫一扫下面二维码
下面是html, 遇到了一个坑，就是所有a标签阻止了默认事件无法跳转。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>图片预览支持手机端PC端</title>
<meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1,user-scalable=no, minimum-scale=1.0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<link href="https://cdn.bootcss.com/mui/3.4.0/css/mui.min.css" rel="stylesheet">
<style>
/* 自己定义的css */
* {
margin: 0;
padding: 0;
}
img {
width: 100%
}
/*
* 下面这些样式不包含在mui里面，可以根据你的需求是改, 必须
*/
.mui-preview-image.mui-fullscreen {
position: fixed;
z-index: 20;
background-color: #000;
}
.mui-preview-header,
.mui-preview-footer {
position: absolute;
width: 100%;
left: 0;
z-index: 10;
}
.mui-preview-header {
height: 44px;
top: 0;
}
.mui-preview-footer {
height: 50px;
bottom: 0px;
}
.mui-preview-header .mui-preview-indicator {
display: block;
line-height: 25px;
color: #fff;
text-align: center;
margin: 15px auto 4;
width: 70px;
background-color: rgba(0, 0, 0, 0.4);
border-radius: 12px;
font-size: 16px;
}
.mui-preview-image {
display: none;
-webkit-animation-duration: 0.5s;
animation-duration: 0.5s;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
}
.mui-preview-image.mui-preview-in {
-webkit-animation-name: fadeIn;
animation-name: fadeIn;
}
.mui-preview-image.mui-preview-out {
background: none;
-webkit-animation-name: fadeOut;
animation-name: fadeOut;
}
.mui-preview-image.mui-preview-out .mui-preview-header,
.mui-preview-image.mui-preview-out .mui-preview-footer {
display: none;
}
.mui-zoom-scroller {
position: absolute;
display: -webkit-box;
display: -webkit-flex;
display: flex;
-webkit-box-align: center;
-webkit-align-items: center;
align-items: center;
-webkit-box-pack: center;
-webkit-justify-content: center;
justify-content: center;
left: 0;
right: 0;
bottom: 0;
top: 0;
width: 100%;
height: 100%;
margin: 0;
-webkit-backface-visibility: hidden;
}
.mui-zoom {
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d;
}
.mui-slider .mui-slider-group .mui-slider-item img {
width: auto;
height: auto;
max-width: 100%;
max-height: 100%;
}
.mui-android-4-1 .mui-slider .mui-slider-group .mui-slider-item img {
width: 100%;
}
.mui-android-4-1 .mui-slider.mui-preview-image .mui-slider-group .mui-slider-item {
display: inline-table;
}
.mui-android-4-1 .mui-slider.mui-preview-image .mui-zoom-scroller img {
display: table-cell;
vertical-align: middle;
}
.mui-preview-loading {
position: absolute;
width: 100%;
height: 100%;
top: 0;
left: 0;
display: none;
}
.mui-preview-loading.mui-active {
display: block;
}
.mui-preview-loading .mui-spinner-white {
position: absolute;
top: 50%;
left: 50%;
margin-left: -25px;
margin-top: -25px;
height: 50px;
width: 50px;
}
.mui-preview-image img.mui-transitioning {
-webkit-transition: -webkit-transform 0.5s ease, opacity 0.5s ease;
transition: transform 0.5s ease, opacity 0.5s ease;
}
@-webkit-keyframes fadeIn {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
@keyframes fadeIn {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
@-webkit-keyframes fadeOut {
0% {
opacity: 1;
}
100% {
opacity: 0;
}
}
@keyframes fadeOut {
0% {
opacity: 1;
}
100% {
opacity: 0;
}
}
.mui-content p img {
max-width: 100%;
height: auto;
}
</style>
</head>
<body>
<!--
把图片包含在 .mui-content 里面
data-preview-src="" 必须指定不管是否为空，意思是点击预览后图片的地址，他默认是src的图片， 做缩略图有用
data-preview-group="1" 代表组，同一个组当点击预览后可以滑动浏览下一张
-->
<div class="mui-content">
<img src="./images/2.jpg" data-preview-src="" data-preview-group="1" draggable="false">
<img src="./images/1.jpg" data-preview-src="" data-preview-group="1" draggable="false">
</div>
</body>
<!-- 引入mui核心库 -->
<script src="https://cdn.bootcss.com/mui/3.4.0/js/mui.min.js"></script>
<!-- 引入mui缩放插件 -->
<script src="./js/mui.zoom.js"></script>
<!-- 引入mui图片预览插件 -->
<script src="./js/mui.previewimage.js"></script>
<script>
// 只要执行这个就好了
mui.previewImage();
</script>
</html>
photoswipe
或者扫一扫二维码
html代码, 遇到一个坑是在SPA应用预览图片后会在URL追加参数#&gid=1&pid=1
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>photoswipe图片预览</title>
<link rel='stylesheet' href='./css/photoswipe.min.css?v=4.1.1'>
<link rel='stylesheet' href='./css/default-skin.min.css?v=4.1.1'>
<style>
* {
margin: 0;
padding: 0;
}
.my-gallery {
width: 100%;
float: left;
}
.my-gallery img {
width: 100%;
height: auto;
}
.my-gallery figure {
display: block;
float: left;
margin: 0 5px 5px 0;
width: 150px;
}
.my-gallery figcaption {
display: none;
}
</style>
</head>
<body>
<div class="my-gallery" itemscope itemtype="http://schema.org/ImageGallery">
<figure itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
<!-- data-size 是图片的大小必须填，不然有坑 -->
<!-- a链接是原图地址， img是小图地址 -->
<a href="./images/da.jpg" itemprop="contentUrl" data-size="1024x1024">
<img src="./images/xiao.jpg" itemprop="thumbnail">
</a>
</figure>
</div>
<!-- 这个就是点击后预览的组件，包括按钮什么的 -->
<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"></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>
</button>
<div class="pswp__caption">
<div class="pswp__caption__center">
</div>
</div>
</div>
</div>
</div>
<script src='./js/photoswipe.min.js?v=4.1.1'></script>
<script src='./js/photoswipe-ui-default.min.js?v=4.1.1'></script>
<script>
var initPhotoSwipeFromDOM = function(gallerySelector) {
var parseThumbnailElements = function(el) {
var thumbElements = el.childNodes,
numNodes = thumbElements.length,
items = [],
figureEl,
linkEl,
size,
item;
for(var i = 0; i < numNodes; i++) {
figureEl = thumbElements[i];
if(figureEl.nodeType !== 1) {
continue;
}
linkEl = figureEl.children[0];
size = linkEl.getAttribute('data-size').split('x');
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) {
item.msrc = linkEl.children[0].getAttribute('src');
}
item.el = figureEl;
items.push(item);
}
return items;
};
var closest = function closest(el, fn) {
return el && ( fn(el) ? el : closest(el.parentNode, fn) );
};
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);
options = {
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function(index) {
var thumbnail = items[index].el.getElementsByTagName('img')[0],
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 );
}
};
// 执行函数
initPhotoSwipeFromDOM('.my-gallery');
</script>
</body>
</html>
关于viewer.js