您可以向the_posts 如果存在快捷码，则挂起，如果存在，则仅将样式排入队列：

function check_for_shortcode($posts) {
    if ( empty($posts) )
        return $posts;

    $found = false;

    foreach ($posts as $post) {
        if ( stripos($post->post_content, \'[CHANGE_TO_YOUR_SHORT_CODE\') )
            $found = true;
            break;
        }

    if ($found){
        $url = get_bloginfo( \'template_directory\' );
        wp_enqueue_style( \'my_login_Stylesheet\',$url.\'/my_login_Stylesheet.css\' );

    }
    return $posts;
}
add_action(\'the_posts\', \'check_for_shortcode\');