1、 viewer.js简介
Viewer.js 是一款强大的图片查看器。我们通过Viewer.js 在页面上添加强大的图片查看功能，同时，这款优秀的插件配置操作起来也非常的方便。
Viewer.js分为2个版本，js版本和jquery版本，下载地址分别为
纯JS版本：https://github.***/fengyuanchen/viewerjs
jQuery 版本：GitHub - fengyuanchen/jquery-viewer: A jQuery plugin wrapper for Viewer.js.、
网上看到有说jquery版本有bug，最后选用啦js版本，demo截图大概如下：
2、Viewer.js支持的功能
支持移动设备触摸事件
支持响应式
支持放大/缩小
支持旋转(类似微博的图片旋转)
支持水平/垂直翻转
支持图片移动
支持键盘
支持全屏幻灯片模式(可做屏保)
支持缩略图
支持标题显示
支持多种自定义事件
3、Viewer.js的API
| 名称 | 类型 | 默认值 | 说明 |
|---|---|---|---|
| inline | 布尔值 | false | 启用 inline 模式 |
| button | 布尔值 | true | 显示右上角关闭按钮(jQuery 版本无效) |
| navbar | 布尔值/整型 | true | 显示缩略图导航 |
| title | 布尔值/整型 | true | 显示当前图片的标题(现实 alt 属性及图片尺寸) |
| toolbar | 布尔值/整型 | true | 显示工具栏 |
| tooltip | 布尔值 | true | 显示缩放百分比 |
| movable | 布尔值 | true | 图片是否可移动 |
| zoomable | 布尔值 | true | 图片是否可缩放 |
| rotatable | 布尔值 | true | 图片是否可旋转 |
| scalable | 布尔值 | true | 图片是否可翻转 |
| transition | 布尔值 | true | 使用 CSS3 过度 |
| fullscreen | 布尔值 | true | 播放时是否全屏 |
| keyboard | 布尔值 | true | 是否支持键盘 |
| interval | 整型 | 5000 | 播放间隔，单位为毫秒 |
| zoomRatio | 浮点型 | 0.1 | 鼠标滚动时的缩放比例 |
| minZoomRatio | 浮点型 | 0.01 | 最小缩放比例 |
| maxZoomRatio | 数字 | 100 | 最大缩放比例 |
| zIndex | 数字 | 2015 | 设置图片查看器 modal 模式时的 z-index |
| zIndexInline | 数字 | 0 | 设置图片查看器 inline 模式时的 z-index |
| url | 字符串/函数 | src | 设置大图片的 url |
| build | 函数 | null | 回调函数，具体查看演示 |
| built | 函数 | null | 回调函数，具体查看演示 |
| show | 函数 | null | 回调函数，具体查看演示 |
| shown | 函数 | null | 回调函数，具体查看演示 |
| hide | 函数 | null | 回调函数，具体查看演示 |
| hidden | 函数 | null | 回调函数，具体查看演示 |
| view | 函数 | null | 回调函数，具体查看演示 |
| viewed | 函数 | null | 回调函数，具体查看演示 |
4 使用方法
4.1 引入方式
js，jquery版本,直接文件引入
javascript版：
<link rel="stylesheet" href="css/viewer.min.css">
<script src="js/viewer.min.js"></script>
jQuery版：
<link rel="stylesheet" href="css/viewer.min.css">
<script src="js/jquery.min.js"></script>
<script src="js/viewer.min.js"></script>
npm，直接install
npm install viewerjs
4.2 简单demo
这里为我用的是js版本，简单做了一个demo
html代码
<!doctype html>
<html lang="en" ng-app="pharosApp">
<head>
<meta charset="utf-8">
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />
<title>图片预览</title>
<link rel="stylesheet" href="viewer.min.css" />
<script src="jquery.min.js"></script>
<script type="text/javascript" src="viewer.min.js"></script>
<style>
#viewer {
padding: 2%;
}
#viewer img {
margin: 1%;
width: 22.5%;
height: 200px;
object-fit:fill;
}
</style>
<script>
function previewImg() {
var viewer = new Viewer(document.getElementById('viewer'), {
button: true,
inline: false,
zoomable: true,
title: true,
tooltip: true,
minZoomRatio: 0.5,
maxZoomRatio: 100,
movable: true,
interval: 2000,
navbar: true,
loading: true,
show: function () {
viewer.update();
}
});
$("body").on("click", ".viewer-container", function (e) {
viewer.hide()
});
$("body").on("click", ".viewer-canvas", function (e) {
e.stopPropagation();
});
$("body").on("click", ".viewer-footer", function (e) {
e.stopPropagation();
});
$("body").on("click", ".viewer-button", function (e) {
e.stopPropagation();
});
$("body").on("click", ".viewer-tooltip", function (e) {
e.stopPropagation();
});
$("body").on("click", ".viewer-player", function (e) {
e.stopPropagation();
});
}
</script>
</head>
<body>
<div id="viewer">
<img src="1.png" />
<img src="2.png" />
<img src="3.png" />
</div>
</body>
</html>
5.viewer.js源码，js版本
viewer.min.css
/*!
* Viewer.js v0.3.1
* https://github.***/fengyuanchen/viewerjs
*
* Copyright (c) 2015-2016 Fengyuan Chen
* Released under the MIT license
*
* Date: 2016-02-02T11:35:36.273Z
*/.viewer-container,.viewer-navbar{background-color:#000;overflow:hidden}.viewer-canvas,.viewer-container,.viewer-footer,.viewer-player{right:0;bottom:0;left:0}.viewer-button,.viewer-canvas,.viewer-container,.viewer-footer,.viewer-list,.viewer-navbar,.viewer-open,.viewer-title,.viewer-toolbar,.viewer-toolbar>li{overflow:hidden}.viewer-close:before,.viewer-flip-horizontal:before,.viewer-flip-vertical:before,.viewer-fullscreen-exit:before,.viewer-fullscreen:before,.viewer-next:before,.viewer-one-to-one:before,.viewer-play:before,.viewer-prev:before,.viewer-reset:before,.viewer-rotate-left:before,.viewer-rotate-right:before,.viewer-zoom-in:before,.viewer-zoom-out:before{font-size:0;line-height:0;display:block;width:20px;height:20px;color:transparent;background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAARgAAAAUCAYAAABWOyJDAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAALEgAACxIB0t1+/AAAABx0RVh0U29mdHdhcmUAQWRvYmUgRmlyZXdvcmtzIENTNui8sowAAAQPSURBVHic7Zs/iFxVFMa/0U2UaJGksUgnIVhYxVhpjDbZCBmLdAYECxsRFBTUamcXUiSNncgKQbSxsxH8gzAP3FU2jY0kKKJNiiiIghFlc***P4p3nPCdv3p9778vsLOcHB2bfveeb7955c3jvvNkBIMdxnD64a94GHMfZu3iBcRynN7zAOI7TG15gHCeeNUkr8zaxG2lbYDYsdgMbktBsP03jdQwljSXdtBhLOmtjowC9Mg9L+knSlcD8TNKpSA9lBpK2JF2VdDSR5n5J64m0qli399hNFMUlpshQii5jbXTbHGviB0nLNeNDSd9VO4A2UdB2fp+x0e***aXxWXGA2X0au/3HgN9P4LFCjIANOJdrLr0zzZ+BEpNYDwKbpnQMeAw4m8HjQtM6Z9qa917zPQwFr3M5KgA6J5rTJCdFZJj9/lyvGhsDvwFNVuV2MhhjrK6b9bFiE+j1r87eBl4HDwCF7/U/k+ofAX5b/EXBv5JoLMuILzf3Ap6Z3EzgdqHMCuF7hcQf4HDgeoHnc***cqdK/TvSDWffFXI/exICY/xZyqc6XLWF1UFZna4gJ7q8BsRvgd2/xXpo6P+D9dfT7PpECtA3***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***);background-repeat:no-repeat}.viewer-zoom-in:before{content:'Zoom 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0}.viewer-container{font-size:0;line-height:0;position:absolute;top:0;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;background-color:rgba(0,0,0,.5);direction:ltr!important;-ms-touch-action:none;touch-action:none;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none}.viewer-container ::-moz-selection,.viewer-container::-moz-selection{background-color:transparent}.viewer-container ::selection,.viewer-container::selection{background-color:transparent}.viewer-container img{display:block;width:100%;min-width:0!important;max-width:none!important;height:auto;min-height:0!important;max-height:none!important}.viewer-player,.viewer-tooltip{display:none;position:absolute}.viewer-canvas{position:absolute;top:0}.viewer-canvas>img{width:auto;max-width:90%!important;height:auto;margin:15px auto}.viewer-footer{position:absolute;text-align:center}.viewer-navbar{background-color:rgba(0,0,0,.5)}.viewer-list{-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;height:50px;margin:0;padding:1px 0}.viewer-list>li{font-size:0;line-height:0;float:left;overflow:hidden;width:30px;height:50px;cursor:pointer;opacity:.5;color:transparent;filter:alpha(opacity=50)}.viewer-list>li+li{margin-left:1px}.viewer-list>.viewer-active{opacity:1;filter:alpha(opacity=100)}.viewer-player{top:0;cursor:none;background-color:#000}.viewer-player>img{position:absolute;top:0;left:0}.viewer-toolbar{width:280px;margin:0 auto 5px;padding:3px 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viewer.min.js
/*!
* Viewer.js v0.3.1
* https://github.***/fengyuanchen/viewerjs
*
* Copyright (c) 2015-2016 Fengyuan Chen
* Released under the MIT license
*
* Date: 2016-02-02T11:35:52.542Z
*/
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