我有一个部分解决方案，我可以添加一个图像裁剪上传到主题定制页面。我还没有弄清楚如何将其连接到acf。

function add_my_media_controls($wp_customize) {

$wp_customize->add_section( \'theme_banner_image\', array(
    \'title\'         => __( \'Banner Image\', \'theme_banner_image\' ),
    \'priority\'      => 35,
) );

$wp_customize->add_setting(\'banner_image\', array(
\'type\' => \'theme_mod\',
\'capability\' => \'edit_theme_options\',
\'sanitize_callback\' => \'absint\'
));

$wp_customize->add_control(new WP_Customize_Cropped_Image_Control($wp_customize, \'banner_image\', array(
    \'section\' => \'theme_banner_image\',
    \'label\' => \'Banner Image\',
    \'width\' => 2000,
    \'height\' => 1200
)));
}
add_action(\'customize_register\', \'add_my_media_controls\');