Codeigniter动态导航 [英] Codeigniter dynamic navigation

问题描述

我是Codeigniter的新手.我正在尝试使用mysql数据库编写应用程序. 在我的网站上，我想将菜单用作:

I am a newbie with codeigniter. I am trying to write an application using mysql database. In my site I want to use menu as :

+Homepage
+About
+Services
  +Education services
  +neurofeedback
  +biofeedback

我需要一些信息来理解.我将页面控制器用作主页控制器:

I need some information to understand. I use pages controller as main pages controller:

<?php 

class Pages extends CI_Controller {

        public function view($page = 'home')
        {$this->load->view('templates/header', $data);
        $this->load->view('pages/'.$page, $data);
        $this->load->view('templates/footer', $data);

我的问题是:

1)菜单控制器必须在页面控制器内编码还是单独编码?

1) where the menu controller must be coded inside pages controller or seperate one?

2)我如何从数据库中制作菜单控制器?

2) how can i make the menu controller from database ?

3)如何与菜单ID和页面ID建立联系?

3) How can i make relation with the menu id and the page id?

我做了很多研究，但我需要更多的了解.

I made lots of research but i need a little bit more understanding .

谢谢您的帮助.

正如您所说，我已经使用了MY_Controller.

Edit : I have used MY_Controller as you say .

这是我的页面控制器:

class Home extends MY_Controller {
         function __construct() {
    parent::__construct();
  }

        public function view($page = 'home')
        {
         $this->load->helper('text');
            $data['records']= $this->services_model->getAll();
            if ( ! file_exists('application/views/pages/'.$page.'.php'))
            {
                // Whoops, we don't have a page for that!
                show_404();
            }

            $data['title'] = ucfirst($page); // Capitalize the first letter


            $this->load->view('pages/'.$page, $data);


        }

}

推荐答案

菜单控制器必须在页面控制器内部编码还是单独编码?

where the menu controller must be coded inside pages controller or seperate one?

假设您有一个模板，所有页面都必须遵循该模板，建议您这样做.

Assuming that you have a template that must be followed by all pages, I suggest you to do this.

1.创建一个基本控制器

在./application/core/文件夹中，创建一个名为MY_Controller的文件

In the ./application/core/ folder, create a file called MY_Controller

class MY_Controller extends CI_Controller {

  protected $data = array();

  function __construct() {
    parent::__construct();
  }

  function render_page($view) {
    //do this to don't repeat in all controllers...
    $this->load->view('templates/header', $this->data);
    //menu_data must contain the structure of the menu...
    //you can populate it from database or helper
    $this->load->view('templates/menu', $menu_data);
    $this->load->view($view, $this->data);
    $this->load->view('templates/footer', $this->data);
  }

}

2.在每个页面上创建一个控制器，并使用MY_Controller代替CI_Controller

class Homepage extends MY_Controller {
  function __construct() {
    parent::__construct();
  }

  function index() {
    //define data that the view can access
    $this->data['someDataToView'] = 'Some data';
    $this->render_page('pages/homepage');
  }

}

如何从数据库中制作菜单控制器?

how can i make the menu controller from database?

好吧，您将没有菜单的控制器，而是一个视图.

Well, you will not have a controller for the menu, but a view instead.

菜单的可能性

1. 为菜单创建一个视图，在MY_Controller中从数据库中加载记录，在render_page()中加载该视图；
2. 创建菜单视图，创建 Helper 函数，该函数定义菜单结构并在MY_Controller中使用，将视图加载到render_page();

1. Create a view for the menu, load the records from the database in MY_Controller, load the view in render_page();
2. Create a view for the menu, create a Helper function that defines the menu structure and use in MY_Controller, load the view in render_page();

菜单模板示例(根据您的情况进行调整):

./application/views/templates/menu.php

./application/views/templates/menu.php

<ul>
<?php foreach($menus as $menu): ?>
  <li><a href='<?php print $menu["url"] ?>'><?php print $menu["title"] ?></a></li>
<?php endforeach; ?>
</ul>

修改

鉴于您的Home控制器，我认为该错误在于您的file_exists检查中.请参阅我更改的Home控制器:

Given your Home controller, I think the error is in your file_exists check. See the Home controller that I change:

class Home extends MY_Controller {
  function __construct() {
    parent::__construct();
  }

   public function view($page = 'home') {
     $this->load->helper('text');
     //always use $this->data
     $this->data['records']= $this->services_model->getAll();
     if ( ! file_exists(APPPATH.'views/pages/'.$page.'.php'))
     {
       //check the content of APPPATH.'views/pages/'.$page.'.php'
       // Whoops, we don't have a page for that!
       show_404();
     }

     $this->data['title'] = ucfirst($page); // Capitalize the first letter

     //if you use the MY_Controller, check the render_page function...
     //$this->load->view('pages/'.$page, $data);
     $this->render_page('pages/'.$page)
   }
}

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