新建MAGENTO的运费方式

在我们网站开发过程中常常会遇到各种运费的问题，怎样快速添加一个简单的运费规则呢，下面是快速建立运费规则的一些步骤。
模板文件路径:

app

• code
  • local
    • Tang
      • MyCarrier
        • Model
          • Carrier.php
        • etc
          • config.xml
          • system.xml
• etc
  • modules
    • Tang.xml
      Carrier.php文件中的内容：

<?php
class Tang_MyCarrier_Model_Carrier
extends Mage_Shipping_Model_Carrier_Abstract
implements Mage_Shipping_Model_Carrier_Interface
{
protected $_code = 'tang_mycarrier';

public function collectRates(Mage_Shipping_Model_Rate_Request $request)
{
    $rate = Mage::getModel('shipping/rate_result_method');
    /* @var $rate Mage_Shipping_Model_Rate_Result_Method */

    $rate->setCarrier($this->_code);
    /**
     * getConfigData(config_key) returns the configuration value for the
     * carriers/[carrier_code]/[config_key]
     */
    $rate->setCarrierTitle($this->getConfigData('title'));

    $rate->setMethod('tang_mycarrier');
    $rate->setMethodTitle('tang_mycarrier');

    $rate->setPrice(58.00);
    $rate->setCost(0);

    return $rate;
}

public function getAllowedMethods()
{
    return array('tang_mycarrier' => $this->getConfigData('name'));
}

}
etc.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<config>
<modules>
<Tang_MyCarrier>
<module>0.0.1</module>
</Tang_MyCarrier>
</modules>
<global>
<models>
<tang_mycarrier>
<class>tang_MyCarrier_Model</class>
</tang_mycarrier>
</models>
</global>

<default>
<carriers>
<tang_mycarrier>
<active>1</active>

<model>tang_mycarrier/carrier</model>

<title>Smashing Magazine Carrier</title>

<sort_order>10</sort_order>

<sallowspecific>0</sallowspecific>
</tang_mycarrier>
</carriers>
</default>
</config>
system.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<config>
<sections>
<carriers translate="label" module="shipping">
<groups>
<tang_mycarrier translate="label">
<label>国际物流</label>
<frontend_type>text</frontend_type>
<sort_order>2</sort_order>
<show_in_default>1</show_in_default>
<show_in_website>1</show_in_website>
<show_in_store>1</show_in_store>
<fields>

                        This shipping carrier abstract checks
                        this value to determine whether
                        the carrier should be shown.
                    -->
                    <active translate="label">
                        <label>Enabled</label>
                        <frontend_type>select</frontend_type>
                        <source_model>adminhtml/system_config_source_yesno</source_model>
                        <sort_order>1</sort_order>
                        <show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>0</show_in_store>
                    </active>
                    <!--
                        This value can be used to specify a
                        custom title for our method.
                    -->
                    <title translate="label">
                        <label>Title</label>
                        <frontend_type>text</frontend_type>
                        <sort_order>2</sort_order>
                        <show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>1</show_in_store>
                    </title>
                    <!--
                        The sort order is used in Magento
                        to determine what order the carrier
                        will appear in relative to the
                        other carriers available.
                    -->
                    <sort_order translate="label">
                        <label>Sort Order</label>
                        <frontend_type>text</frontend_type>
                        <sort_order>100</sort_order>
                        <show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>0</show_in_store>
                    </sort_order>
                    <!--
                        This value is used to specify whether
                        the carrier is available only for
                        specific countries or all countries
                        available in the current Magento
                        installation.
                    -->
                    <sallowspecific translate="label">
                        <label>Ship to Applicable Countries</label>
                        <frontend_type>select</frontend_type>
                        <sort_order>90</sort_order>
                        <frontend_class>shipping-applicable-country</frontend_class>
                        <source_model>adminhtml/system_config_source_shipping_allspecificcountries</source_model>
                        <show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>0</show_in_store>
                    </sallowspecific>
                    <!--
                        If 'specific countries' is chosen
                        in the previous option, then this field
                        allows the administrator to specify
                        which specific countries this carrier
                        should be available for.
                    -->
                    <specificcountry translate="label">
                        <label>Ship to Specific Countries</label>
                        <frontend_type>multiselect</frontend_type>
                        <sort_order>91</sort_order>
                        <source_model>adminhtml/system_config_source_country</source_model>
                        <show_in_default>1</show_in_default>
                        <show_in_website>1</show_in_website>
                        <show_in_store>0</show_in_store>
                        <can_be_empty>1</can_be_empty>
                    </specificcountry>
                </fields>
            </tang_mycarrier>
        </groups>
    </carriers>
</sections>

</config>
Tang_MyCarrier.xml文件

<?xml version="1.0"?>
<config>
<modules>
<Tang_MyCarrier>
<active>true</active>
<codePool>local</codePool>
<depends>
<Mage_Shipping />
</depends>
</Tang_MyCarrier>
</modules>
</config>