加载脚本只是为了在admin中自定义帖子类型

$args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true,
    'query_var' => true,
    //'menu_icon' => get_stylesheet_directory_uri() . '/article16.png',
    'rewrite' => true,
    'capability_type' => 'post',
    'hierarchical' => false,
    'menu_position' => 4,
    'taxonomies' => array('post_tag','category'),
    'supports' => array('title','editor','comments','trackbacks','revisions','custom-fields','page-attributes','thumbnail', 'excerpt', 'tags')
  ); 

register_post_type( 'portfolio' , $args );

add_action("admin_init", "admin_init");
function admin_init(){ // add_meta_box( $id, $title, $callback, $page, $context, $priority ); 
  add_meta_box("media", "Media Type", "media", "portfolio", "side", "high");
  add_meta_box("map_meta", "Mapping Info", "map_meta", "portfolio", "normal", "high");
}

add_action( 'admin_print_scripts-post-new.php', 'portfolio_admin_script', 11 );
add_action( 'admin_print_scripts-post.php', 'portfolio_admin_script', 11 );

function portfolio_admin_script() {
    global $post_type;
    if( 'portfolio' == $post_type )
    wp_enqueue_script( 'portfolio-admin-script', get_stylesheet_directory_uri() . '/admin.js' );
}

// Enter custom JS TO ADMIN AREA

add_action( 'admin_print_scripts-post-new.php', 'banner_admin_script', 11 );
add_action( 'admin_print_scripts-post.php', 'banner_admin_script', 11 );

function banner_admin_script() {
    global $post_type;
    if ( $post_type == 'banner' )
        wp_enqueue_script( 'portfolio-admin-script', plugins_url( '/js/admin.js', 
            __FILE__), '', '', true ); // "TRUE" - ADDS JS TO FOOTER
}