<catalog_category_layered translate="label">

            <label>Catalog Category (Anchor)</label>

            <reference name="left">

                <block type="catalog/layer_view" name="catalog.leftnav" after="currency" template="catalog/layer/view.phtml"/>

            </reference>

            <reference name="content">

                <block type="catalog/category_view" name="category.products" template="catalog/category/view.phtml">

                    <span style="color:#cc0000;"><block type="catalog/product_list" name="product_list" template="catalog/product/list.phtml">

                        <block type="catalog/product_list_toolbar" name="product_list_toolbar" template="catalog/product/list/toolbar.phtml">

                            <block type="page/html_pager" name="product_list_toolbar_pager"/>

                        </block></span>

                        <action method="addColumnCountLayoutDepend"><layout>empty</layout><count>6</count></action>

                        <action method="addColumnCountLayoutDepend"><layout>one_column</layout><count>5</count></action>

                        <action method="addColumnCountLayoutDepend"><layout>two_columns_left</layout><count>4</count></action>

                        <action method="addColumnCountLayoutDepend"><layout>two_columns_right</layout><count>4</count></action>

                        <action method="addColumnCountLayoutDepend"><layout>three_columns</layout><count>3</count></action>

                       <span style="color:#cc0000;"> <action method="setToolbarBlockName"><name>product_list_toolbar</name></action></span>

                    <span style="color:#cc0000;"></block></span>

                </block>

            </reference>

        </catalog_category_layered>  

    <span style="color: rgb(204, 0, 0); "> <action method="setToolbarBlockName"><name>product_list_toolbar</name></action></span>  

    protected function _beforeToHtml()

        {

           <span style="color:#000099;"> $toolbar = $this->getToolbarBlock();//实例化ToolbarBlock</span>  

            // called prepare sortable parameters

           <span style="color:#000099;"> $collection = $this->_getProductCollection();//获取产品集合

    </span>        // use sortable parameters

            if ($orders = $this->getAvailableOrders()) {

                $toolbar->setAvailableOrders($orders);

            }

            if ($sort = $this->getSortBy()) {

                $toolbar->setDefaultOrder($sort);

            }

            if ($dir = $this->getDefaultDirection()) {

                $toolbar->setDefaultDirection($dir);

            }

            if ($modes = $this->getModes()) {

                $toolbar->setModes($modes);

            }  

            <span style="color:#000099;">// set collection to toolbar and apply sort

            $toolbar->setCollection($collection);//用ToolbarBlock实例对产品集合排序和分页</span>  

          <span style="color:#3333ff;">  $this->setChild('toolbar', $toolbar);//设置ToolbarBlock实例为当前Block的Child，在显示的时候会有用</span>  

            Mage::dispatchEvent('catalog_block_product_list_collection', array(

                'collection' => $this->_getProductCollection()

            ));  

            $this->_getProductCollection()->load();  

            return parent::_beforeToHtml();

        }  

    <span style="color:#000099;">$toolbar->setCollection($collection);</span>  

    public function setCollection($collection)

        {

            $this->_collection = $collection;//对象引用  

           <span style="color:#009900;"> $this->_collection->setCurPage($this->getCurrentPage());  

            // we need to set pagination only if passed value integer and more that 0

            $limit = (int)$this->getLimit();

            if ($limit) {

                $this->_collection->setPageSize($limit);

            }//分页功能</span>

            <span style="color:#3333ff;">if ($this->getCurrentOrder()) {

                $this->_collection->setOrder($this->getCurrentOrder(), $this->getCurrentDirection());

            }//排序功能</span>

            return $this;

        }  

    <?php echo $this->getToolbarHtml() ?>  

    public function getToolbarHtml()

        {

            return $this->getChildHtml('toolbar');//显示它的Child Block 与_beforeToHtml()中的$this->setChild('toolbar', $toolbar);相对应

        }