Wordpress 向acf_form（）添加分类术语

我使用高级自定义字段中的acf_form（）函数，允许用户通过我的WordPress站点上的前端表单创建帖子

我无法理解的是如何在创建这些帖子时将自定义分类法中的分类法术语添加到这些帖子中

这是我到目前为止的代码，它可以很好地创建帖子

acf_form(array(
    'post_id'       => $submission_id,
    'post_title'    => true,
    'post_content'  => false,
    'new_post'      => array(
        'post_type'     => '2017-submission',
        'post_status'   => 'publish',
    ),
    'submit_value' => __("Save", 'acf'),
));

这里有一些类似于我期望的工作。第8行和第9行组成

acf_form(array(
    'post_id'       => $submission_id,
    'post_title'    => true,
    'post_content'  => false,
    'new_post'      => array(
        'post_type'     => '2017-submission',
        'post_status'   => 'publish', 
        'key' => 'project-category', // This is made up and does not work
        'value' => 'housing', // This is made up and does not work
    ),
    'submit_value' => __("Save", 'acf'),
));