yii框架使用分页的方法分析

$criteria = new CDbCriteria();   //new cdbcriteria数据库
$criteria->id = 'id ASC';      //排序规则
$count = Exchange::model()->count($criteria);
$pager = new CPagination($count);
$pager->pageSize=30;
$pager->applyLimit($criteria);
$categoryInfo = Category::model()->findAll($criteria); //根据条件查询

$criteria = new CDbCriteria();
$criteria->order = 'id ASC';
$criteria->addCondition('status=1');   //根据条件查询
$criteria->addCondition('exchange_status=0');
$count = Exchange::model()->count($criteria);
$pager = new CPagination($count);
$pager->pageSize=30;
$pager->applyLimit($criteria); 
$exchangeInfo = Exchange::model()->findAll($criteria);

array("pages" => $pager)

$this->widget('CLinkPager',array(
        'header'=>'',
        'firstPageLabel' => '首页',
        'lastPageLabel' => '末页',
        'prevPageLabel' => '上一页',
        'nextPageLabel' => '下一页',
        'pages' => $pages,
        'maxButtonCount'=>8,
     )
 );