我使用此代码在主站点中的帖子上循环：

<?php
$sites = wp_get_sites();
foreach($sites as $site) :
    // Only subsites
        // Connect to new multisite
        switch_to_blog($site[\'blog_id\']);
        $case_args = array(
            \'post_type\'        => \'downloads\',
            \'posts_per_page\'   => 1,
            \'orderby\'          => \'date\',
            \'order\'            => \'DESC\',
            );
        $latest_cases = new WP_Query($case_args);
        if ( $latest_cases->have_posts() ) : ?>

<?php the_title(); ?>

<?php endwhile; ?>
<?php endif; ?>
<?php wp_reset_query();
// Quit multisite connection
restore_current_blog();
endforeach; 
?>