Widget扩展一般用于页面组件的扩展，在页面根据需要输出不同的内容，下面介绍一下ThinkPHP中Widget的两种写法及调用
写法一：
ArticlWidget.class.php文件：
class ArticleWidget extends Widget {
/**
*
* @param array $data
* @return type
* 调用方法：{:W('ArticleList',array('cid'=>25,'limit'=>5))}
* cid为分类id，limit为调用数量
*/
public function render($data) {
$Article = M('Article');
$articleMap["cid"] = $data["cid"];
$data["articleList"] = $Article->where($articleMap)->order('id desc')->limit($data["limit"])->select();
foreach ($articleList as $key => $value) {
if ($value["thumbnail"] == "") {
$data["articleList"][$key]["thumbnail"] = '/Public/Img/Common/noThumbnail.jpg';
}
}
return $this->renderFile('articleList', $data);
}
}
模板文件articleList.html在Lib/Widget/Article目录下
<volist name="articleList" id="articleList_vo">
<li>
<a href="__APP__/Channel/articleDetail/code/article/id/{$articleList_vo.id}" title="{$articleList_vo.title}">{$articleList_vo.title}</a>
</li>
</volist>
写法二：
class ArticleWidget extends Action {
/**
*
* @param array $data
* @return type
* 调用方法：{:R('Article/articleList',array('cid'=>25,'limit'=>5),'Widget')}
* cid为分类id，limit为调用数量
*/
public function articleList($cid, $limit) {
$Article = M('Article');
$articleMap["cid"] = $cid;
$data = $Article->where($articleMap)->order('id desc')->limit($limit)->select();
foreach ($data as $key => $value) {
if ($value["thumbnail"] == "") {
$data[$key]["thumbnail"] = '/Public/Img/Common/noThumbnail.jpg';
}
}
$this->assign('articleList', $data);
$this->display('Widget:articleList');
}
}
模板文件articleList.html，内容同写法一，但放在Tpl/风格名/Widget/目录下
如果模板文件放在ArticleWiget.class.php文件所在目录的Article文件夹下，则写法如下：
$this->display(dirname(__FILE__) . '/Article/articleList.html');
