JQuery开发之Galleriffic图片插件介绍
▲图片一 Galleriffic图片画廊插件
Galleriffic的主要特点如下：
· Smart image preloading after the page is loaded
· Thumbnail navigation (with pagination)
· jQuery.history plugin integration to support bookmark-friendly URLs per-image
· Slideshow (with optional auto-updating url bookmarks)
· Keyboard navigation
· Events that allow for adding your own custom transition effects
· API for controlling the gallery with custom controls
· Support for image captions
· Flexible configuration
· Graceful degradation when javascript is not available
· Support for multiple galleries per page
下面，我们结合代码，来阐述Galleriffic的工作原理。
1. 下载最新版本的Galleriffic与jQuery。jQuery在1.3.2以上。
2. 在目标HTML代码中引入jQuery库与Galleriffic插件。两者的实现方式均为javascript。
<head>
...
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript" src="js/jquery.galleriffic.js"></script>
<!-- Optionally include jquery.history.js for history support -->
<script type="text/javascript" src="js/jquery.history.js"></script>
<script type="text/javascript" src="js/jquery.opacityrollover.js"></script>
...
</head>
3. 添加容器元素Div。值得注意的是，这里所有的Div都是可选的。用户可以根据自己的实际情况做出取舍。
<div id="controls"></div>
<div id="loading"></div>
<div id="slideshow"></div>
<div id="caption"></div>
<div id="thumbs">
... 这里用来放图片清单…(见步骤4)
</div>
4. 建立图片清单列表
<div id="thumbs">
<ul class="thumbs noscript">
<li>
<a class="thumb" name="optionalCustomIdentifier" href="path/to/slide" title="your image title">
<img src="path/to/thumbnail" alt="your image title again for graceful degradation" />
</a>
<div class="caption">
(这里用来放标题、描述等信息)
</div>
</li>
... (接下的就是类似上面的li代码，一个li元素包含一张图片)
</ul>
</div>
5. 初始化插件
var gallery = $('#gallery').galleriffic('#thumbs', {
delay: 3000 // 动画播放间隔时间
numThumbs: 20 // 所要显示的图片数目
preloadAhead: 40 // 设置为-1时预加载所有图片
enableTopPager: false,
enableBottomPager: true,
imageContainerSel: '', // 接下来的三个属性是作为容器的css名
controlsContainerSel: '', // The CSS selector for the element within which the slideshow controls should be rendered
captionContainerSel: '', // The CSS selector for the element within which the captions should be rendered
loadingContainerSel: '', // The CSS selector for the element within which should be shown when an image is loading
renderSSControls: true, // 是否显示播放与暂停按钮
renderNavControls: true, // 是否显示前进后退按钮
playLinkText: 'Play',
pauseLinkText: 'Pause',
prevLinkText: 'Previous',
nextLinkText: 'Next',
nextPageLinkText: 'Next ›',
prevPageLinkText: '‹ Prev',
enableHistory: false, // Specifies whether the url's hash and the browser's history cache should update when the current slideshow image changes
autoStart: false, // 是否自动播放
onChange: undefined, // 接下来是插件的回调函数
onTransitionOut: undefined, // accepts a delegate like such: function(callback) { ... }
onTransitionIn: undefined, // accepts a delegate like such: function() { ... }
onPageTransitionOut: undefined, // accepts a delegate like such: function(callback) { ... }
onPageTransitionIn: undefined // accepts a delegate like such: function() { ... }
});