在wordpress上显示字段标签

Question

我尝试在我的wordpress网站上显示我的Cover图像，标题，PDF和PDF描述，但是没有运气。只有标题出现在网站上。谢谢

//Start the bulletin function to list all items
function bulletin_func( $atts ) {
    $args = array(
        'post_type' => 'focus-bulletin',    //  The custom post type we want to query and display posts from
        'posts_per_page' => -1              // -1 = all posts
    );
    query_posts($args);                     // Query the post type set in the args array

    if ( have_posts() ) : 
        while ( have_posts() ) : 
            the_post();                     // WP post loop to init post data

            ?>
            <div class="bulletin-wrapper">
            <?php

            echo types_render_field("cover-image",
                                    array( "alt" => get_the_title(), 
                                          "width" => '100%', 
                                          "height" => 'auto', 
                                          "proportional" => "false" 
                                         ));
            echo get_the_title();
            echo types_render_field("issue-pdf");
            echo types_render_field("issue-description");

            ?>
            </div>                           
            <?php

        endwhile;
        wp_reset_query();
    endif;
}

add_shortcode( 'bulletin', 'bulletin_func' );
//End the bulletin function to list all items