Codeigniter将数据传递到嵌套视图

Question

I have done very much research on this topic but I cannot find how i can do this. I am trying to add data to the $data parameter in a view that is being called from the controller of another view. However, any data i add to the subview via the subcontroller cannot be accessed by the subview . However, when I try to pass data to the subview via the client view, it works just fine. Most of the fixes on SO seem to reference just calling the $key in $data['key'] rather than $data so that doesn't seem really relevant here...

I have two classes:

• welcome.php - a page
• welcomemenu.php - a set of controls intended to be loaded into welcome.php

Here is my Client Controller (the page that it's on, welcome.php ), which stores the return val from subview $welcomemenu in its own $data array...:

<?php

class Welcome extends CI_Controller {

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

    function index() {
        //echo 'this is the Welcome index function';
        $data['clienttestdata'] = 'data from welcome.php!';
        $data['welcomemenu'] = $this->load->view('welcome/welcomemenu', $data, true);

        $this->load->helper('url');
        $this->load->view('templates/header');
        $this->load->view('pages/welcome', $data);
        $this->load->view('templates/footer');

    }
}

And here is the client view ("welcome_view.php" - seems simple enough. The $welcomemenu var is where I put the returns from my component class...):

    <section id="allWelcomeContent" class="mainBody">
        <header id="mainPageHdr" class=mainPageHdr>
            <!-- other stuff from my header -->
        </header>
        <!-- this is where i want to put the welcome menu... -->
        <section id="mainWelcomeContent" class="mainContent">
            <div>
                <?php echo $welcomemenu;?>
            </div>
        </section>
    </section>

And here is the Controller for my sub-component welcomemenu.php :

<?php

class Welcomemenu extends CI_Controller {

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

    public function index() {
        $data['menu_items'] = array('About', 'Portfolio', 'Resume', 'Fun', 'Blog'); 
        $data['testdata'] = 'data from welcomemenu.php!';

        $this->load->view('welcome/welcomemenu', $data);
    }
}

And lastly: Here is the sub-view that is supposed to get data from its own controller, but cannot, even though it can take data from a calling client (ie, the $clienttestdata shows up fine but $testdata doesn't)!

<section>
<!-- TODO:  make this element repeatable so content can load from controller and/or model. -->
<div id="divMenuItems">
    <?php echo $clienttestdata;?>
    <?php echo $testdata;?>
</div>
</section>

Still i couldn't find any proper solution. if anyone then please give me

Answer 1

When you're including the welcomemenu partial in your Welcome/index method, you have to remember that the view does not go through its own controller. Instead, its contents are returned as a string and stored as a parameter. It gets all of its own parameters through the ones you send to it via $data :

$data['welcomemenu'] = $this->load->view('welcome/welcomemenu', $data, true);

This view will thus have access to everything in $data so far - nothing extra is added through the Welcomemenu controller. So, in the above case, it will have:

array
(
   'clienttestdata' => 'data from welcome.php!'
)

If you add the parameters you need to $data (as $data['testdata'] ), your sub-view will have what it needs.