我似乎无法从codeigniter中的视图中加载视图

时间:2015-05-18 06:16:55

标签: php codeigniter

我正在尝试在CodeIgniter中为我的应用程序开发一个小部件系统。我有一个模板列的数据库表,我循环。从该循环中,然后我遍历该列的小部件表。一旦加载了窗口小部件的数据库信息,我就需要确定为当前窗口小部件加载了哪个文件,并将其添加为窗口小部件的主体。加载的视图文件存储在小部件数组中的body变量中。

问题是在加载主视图文件之前显示窗口小部件内容。窗口小部件的内容需要位于主视图文件中。我做错了什么?

我的控制器:

$widget_types = $this->widget->type_array();

        foreach($columns as $column){

            $column_results[$column['column_id']] = $column;

            $widgets = $this->widget->retrieve($column['column_id']);

          foreach($widgets as $widget){

            $widgets[$widget['id']]['body'] = $this->load->view('widgets/'.$widget_types[$widget['type']]['view'], array('widget' => $widget));

          }

            $column_results[$column['column_id']]['widgets'] = $widgets;


        }

        $data['column_results'] = $column_results;

        $this->load->view('index_body', $data);

小部件模型:

<?php

class Widget extends MY_Model {

    var $info = array();
    var $error = NULL;

    function __construct(){
        parent::__construct();
        $this->error = NULL;
    }

    function get_info($widget_id){

        $this->db->from('template_widgets')->where('widget_id', $widget_id)->limit(1);
        if($query = $this->db->get()){

            if($query->num_rows() > 0){

                $widget = $query->row_array();

                $info = array(
                    'id' => $widget['widget_id'],
                    'title' => $widget['title'],
                    'column_id' => $widget['column_id'],
                    'position' => $widget['position'],
                    'options' => unserialize($widget['options']),
                    'type' => $widget['type']
                );

                $this->info = $info;

            }

        }

    }

    function retrieve($column_id){

        $widget_results = array();

        $this->db->from('template_widgets')->where('column_id', $column_id)->order_by('position', 'asc');
        if($query = $this->db->get()){

            if($query->num_rows() > 0){

                foreach($query->result_array() as $widget){

                    if(empty($widget_results[$widget['widget_id']])){

                        $this->get_info($widget['widget_id']);
                        if($this->error == NULL){

                            $widget_results[$widget['widget_id']] = $this->info;

                        }

                    }

                }

            }

        }

        return $widget_results;

    }

    function type_array($type = ''){

        $widget_types = array(
            0 => array(
                'name' => 'Category Feed',
                'view' => 'category_feed'
            ),
            1 => array(
                'name' => 'Members Feed',
                'view' => 'members_feed'
            ),
            2 => array(
                'name' => 'Events Feed',
                'view' => 'events_feed'
            ),
            3 => array(
                'name' => 'Category List',
                'view' => 'category_list'
            ),
            4 => array(
                'name' => 'Testimonials',
                'view' => 'Testimonials'
            ),
            5 => array(
                'name' => 'Events Calendar',
                'view' => 'events_calendar'
            ),
            6 => array(
                'name' => 'Content',
                'view' => 'content'
            ),
            7 => array(
                'name' => 'Statistics Feed',
                'view' => 'statistics_feed'
            )
        );

        return ($type == '') ? $widget_types : $widget_types[(int) $type];

    }

}

小部件视图文件的示例:

<?php

$str = '';

$CI =& get_instance();
$CI->load->model('member');
$members = $CI->member->result_array($widget['options']['max_results'], $widget['options']['order_column']);

foreach($members as $member){

    if($widget['options']['display_method'] == '1'){

        $str .= 
            '<div class="col-sm-6 col-md-4">
                <div class="thumbnail">
                    '.img(array('src' => attachment_url($member['avatar']['file_name']), 'width' => '192', 'height' => '108', 'border' => '0', 'alt' => 'Article Thumbnail', 'class' => 'img-thumbnail')).'
                    <div class="caption">
                        <h4>'.anchor('members/'.url_title($member['display_name']).'/'.$member['id'], $member['display_name']).'</h4>
                        <p>Joined on '.$member['date_joined'].'</p>
                    </div>
                </div>
            </div>
            ';

    } else {

        $str .=
            '<div class="media">
                <div class="media-left">
                    '.img(array('src' => attachment_url($member['avatar']['file_name']), 'width' => '192', 'height' => '108', 'border' => '0', 'align' => 'left', 'alt' => 'Article Thumbnail', 'class' => 'img-thumbnail')).'
                </div>
                <div class="media-body">
                    <div class="media-heading">
                        <h4>'.anchor('articles/'.url_title($member['display_name']).'/'.$member['id'], $member['display_name']).'</h4>
                        <p>Joined on '.$member['date_joined'].'</p>
                    </div>
                </div>
            </div>
            ';

    }

}

echo $str;

索引正文视图文件:

<?php

$CI =& get_instance();

$str = '
        <div class="container">
            <section id="content">
                <div class="row">
                    ';

if(count($column_results) > 0){

    foreach($column_results as $id => $column){

        $str .=     '<div class="col-md-'.$column['width'].'">
                        ';

        if(count($column['widgets']) > 0){

            foreach($column['widgets'] as $id => $widget){

                $str .= '<div class="panel panel-default">
                            <div class="panel-heading">
                                <h3>'.$widget['title'].'</h3>
                            </div>
                            <div class="panel-body">
                                '.$widget['body'].'
                            </div>
                        </div>
                    ';

            }

        }

        $str .= '</div>
            ';
    }

}

$str .= '</div>
    </section>
</div>
';

echo $str;

2 个答案:

答案 0 :(得分:0)

所以不必在变量中加载视图,我不得不使用输出缓冲区,然后将我的视图加载到ob内容中,如此...

ob_start();
$this->load->view('inner_view_file', array());
$output = ob_get_contents();
ob_end_clean();

$data['inner_view'] = $output;
$this->load->view('outer_view_file', $data);

完美无缺。有点不整洁,但完成工作。

答案 1 :(得分:0)

使用输出缓冲区提供的答案是codeigniter在后台执行此操作的方式,唯一的区别是您重复可能会对性能产生影响的过程。最简单的解决方案是使用:

$data['inner_view'] = $this->load->view('inner_view_file', array(), TRUE);

传递TRUE作为第3个参数告诉codeigniter您不想输出视图文件并且您希望以字符串形式返回。

<强> NB

在您的视图文件中,您应该能够访问$this而不是$CI = &get_instance();

最后,即使创建小部件的方式没有那么大的错误,也许值得研究使用HMVC和codeigniter。