在我的第一个模块中，Prestashop的前台没有变化

PrestaShop的第一天。使用PrestaShop教程中的PrestaShop1.6：创建PrestaShop模块我创建了一个模块（mymodule）。

但是我在前台没有看到什么特别的东西我的模块列在模块列表中。已安装并遵循教程。但前面仍然没有变化（缓存也被清除）。

''css''mymodule.css

div#mymodule_block_home p {
  font-size: 150%;
  font-style:italic;
}

''views''templates''hook''mymodule.tpl

<!-- Block mymodule -->
<div id="mymodule_block_home" class="block">
  <h4>Welcome!</h4>
  <div class="block_content">
    <p>Hello,
       {if isset($my_module_name) && $my_module_name}
           {$my_module_name}
       {else}
           World
       {/if}
       !       
    </p>   
    <ul>
      <li><a href="{$my_module_link}" title="Click this link">Click me!</a></li>
    </ul>
  </div>
</div>
<!-- /Block mymodule -->

''mymodule.php

<?php   
/*This checks for the existence of an always-existing PrestaShop constant (its version number), and if it does not exist, it stops the module from loading. The sole purpose of this is to prevent malicious visitors to load this file directly.*/
if (!defined('_PS_VERSION_'))
  exit;
class MyModule extends Module
{  public function __construct()
  {
    $this->name = 'mymodule';
    $this->tab = 'front_office_features';
    $this->version = '1.0.0';
    $this->author = 'Firstname Lastname';
    $this->need_instance = 0;
    $this->ps_versions_compliancy = array('min' => '1.6', 'max' => _PS_VERSION_); 
    $this->bootstrap = true;
 
    parent::__construct();
 
    $this->displayName = $this->l('My module');
    $this->description = $this->l('Description of my module.');
 
    $this->confirmUninstall = $this->l('Are you sure you want to uninstall?');
 
    if (!Configuration::get('MYMODULE_NAME'))      
      $this->warning = $this->l('No name provided');
  }
 
  public function install()
  {   if (Shop::isFeatureActive())
        Shop::setContext(Shop::CONTEXT_ALL);
      return parent::install() &&
      $this->registerHook('leftColumn') &&
      $this->registerHook('header') &&
      Configuration::updateValue('MYMODULE_NAME', 'my friend');
  }
   
  public function uninstall()
  {
      if (!parent::uninstall() ||
        !Configuration::deleteByName('MYMODULE_NAME')
      )
        return false;
      return true;
  }
 
  public function getContent()
  {
    $output = null;
 
    if (Tools::isSubmit('submit'.$this->name))
    {
        $my_module_name = strval(Tools::getValue('MYMODULE_NAME'));
        if (!$my_module_name
          || empty($my_module_name)
          || !Validate::isGenericName($my_module_name))
            $output .= $this->displayError($this->l('Invalid Configuration value'));
        else
        {
            Configuration::updateValue('MYMODULE_NAME', $my_module_name);
            $output .= $this->displayConfirmation($this->l('Settings updated'));
        }
    }
    return $output.$this->displayForm();
  }
  public function displayForm()
  {
    // Get default language
    $default_lang = (int)Configuration::get('PS_LANG_DEFAULT');
     
    // Init Fields form array
    $fields_form[0]['form'] = array(
        'legend' => array(
            'title' => $this->l('Settings'),
        ),
        'input' => array(
            array(
                'type' => 'text',
                'label' => $this->l('Configuration value'),
                'name' => 'MYMODULE_NAME',
                'size' => 20,
                'required' => true
            )
        ),
        'submit' => array(
            'title' => $this->l('Save'),
            'class' => 'button'
        )
    );
     
    $helper = new HelperForm();
     
    // Module, token and currentIndex
    $helper->module = $this;
    $helper->name_controller = $this->name;
    $helper->token = Tools::getAdminTokenLite('AdminModules');
    $helper->currentIndex = AdminController::$currentIndex.'&configure='.$this->name;
     
    // Language
    $helper->default_form_language = $default_lang;
    $helper->allow_employee_form_lang = $default_lang;
     
    // Title and toolbar
    $helper->title = $this->displayName;
    $helper->show_toolbar = true;        // false -> remove toolbar
    $helper->toolbar_scroll = true;      // yes - > Toolbar is always visible on the top of the screen.
    $helper->submit_action = 'submit'.$this->name;
    $helper->toolbar_btn = array(
        'save' =>
        array(
            'desc' => $this->l('Save'),
            'href' => AdminController::$currentIndex.'&configure='.$this->name.'&save'.$this->name.
            '&token='.Tools::getAdminTokenLite('AdminModules'),
        ),
        'back' => array(
            'href' => AdminController::$currentIndex.'&token='.Tools::getAdminTokenLite('AdminModules'),
            'desc' => $this->l('Back to list')
        )
    );
     
    // Load current value
    $helper->fields_value['MYMODULE_NAME'] = Configuration::get('MYMODULE_NAME');
     
    return $helper->generateForm($fields_form);
  }
  public function hookDisplayLeftColumn($params)
  {
    $this->context->smarty->assign(
      array(
          'my_module_name' => Configuration::get('MYMODULE_NAME'),
          'my_module_link' => $this->context->link->getModuleLink('mymodule', 'display')
      )
  );
    return $this->display(__FILE__, 'mymodule.tpl');
  }
   
  public function hookDisplayRightColumn($params)
  {
    return $this->hookDisplayLeftColumn($params);
  }
   
  public function hookDisplayHeader()
  {
    $this->context->controller->addCSS($this->_path.'css/mymodule.css', 'all');
  }   
}

现在，我可以在后台看到我的模块的配置选项。前面还是没什么不同。

正在等待您的帮助。谢谢