您可以使用get_{$adjacent}_post_where 滤器

基本上，我们所做的就是将查询中的“查找已发布的帖子”部分替换为“查找已发布或未来的帖子”。

/**
 * Amend the \'WHERE\' clause in the SQL query to find an adjacent post
 *
 * @param required string $where  The default \'WHERE\' clause in the query
 * @param boolean $in_same_term   Whether or not the adjacent post should be in the same taxonomy term (not required here)
 * @param array $excluded_terms   The ID\'s of terms that should be excluded (not required here)
 * @return string                 The updated, custom \'WHERE\' clause
 */
add_filter(\'get_previous_post_where\', \'my_add_future_posts_to_nav\', 3, 99);
add_filter(\'get_next_post_where\', \'my_add_future_posts_to_nav\', 3, 99);
function my_add_future_posts_to_nav($where, $in_same_term, $excluded_terms){

    return str_replace("p.post_status = \'publish\'", "p.post_status IN (\'publish\', \'future\')", $where);

}