Wordpress:custom_post_type图片上传

有人能帮我添加一个图像字段吗正在上载。此处是我当前的代码!

    add_action('init', 'pictures_portofolio');

function pictures_portofolio() {
    $args = array(
        'label' => __('Bilder'),
        'singular_label' => __('Bilder'),
        'public' => true,
        'show_ui' => true,
        'capability_type' => 'post',
        'hierarchical' => false,
        'rewrite' => true,
        'supports' => array(false)
    );

    register_post_type( 'Bilder' , $args );
}


add_action("admin_init", "admin_init");
add_action('save_post', 'save_the_post');

function admin_init(){
    register_taxonomy("catalog", array("product"), array("hierarchical" => true, "label" => "Kategorien", "singular_label" => "Kategorien", "rewrite" => true));  

}


function save_the_post(){
    global $post;
    //update_post_meta($post->ID, "price", $_POST["price"]);
}