我检查了存储库中的代码，这个特定函数没有ID参数，这意味着它只获取当前显示的帖子/页面的CF。

快速解决方案是：

$my_page = get_page_by_path( \'my-page\' );
$meta_values = get_post_meta($my_page->ID, \'custom-field-name\', true);

肮脏的解决方案：

$custom_image = types_render_field("photo", array("alt"=>"Product image","width"=>"300","height"=>"200","proportional"=>"true");
if($custom_image) {
    // this page has a custom photo. Print it.
    print $custom_image;
} else {
   // this page don\'t have a photo, therefore we output the photo of the default page
   $id = 1; // the id of the default page
   $post = get_post($id);
   setup_postdata($post);
   print types_render_field("photo", array("alt"=>"Product image","width"=>"300","height"=>"200","proportional"=>"true");
   wp_reset_postdata();
}

不知道从什么时候开始，但你可以通过post id 作为一个论据

<?php 
$postid = get_the_ID();
echo(types_render_field("photo", array("post_id"=>"$postid","alt"=>"Product image", "width"=>"300","height"=>"200","proportional"=>"true"))); 
?>