我也遇到了同样的问题，通过谷歌搜索，我找到了以下解决方案：

// Add the selective part
$wp_customize->selective_refresh->add_partial( \'your_theme_second_logo\', array(
    \'selector\' => \'#yourID\', // You can also select a css class
) );

添加自定义设置后，需要告诉WordPress要通过选择性刷新管理哪些设置。

例如，我想在主徽标旁边添加第二个徽标，因此我添加了以下代码：

/* Customizer fields */
function your_theme_customizer_settings($wp_customize) {

// Add a setting to upload partners logo, right next to our logo
$wp_customize->add_setting(\'your_theme_second_logo\');

// Add the field informations
$wp_customize->add_control( 
    new WP_Customize_Image_Control( 
        $wp_customize, 
        \'your_theme_second_logo\',
        array(
            \'label\' => __(\'Upload second \', \'textdomain\'),
            \'description\' => __( \'Some description\', \'textdomain\'),
            \'section\' => \'title_tagline\',
            \'settings\' => \'your_theme_second_logo\',
        ) 
    ) 
);

// Add the selective part
$wp_customize->selective_refresh->add_partial( \'your_theme_second_logo\', array(
    \'selector\' => \'#yourID\', // You can also select a css class
) );

}

// Customizer action
add_action(\'customize_register\', \'your_theme_customizer_settings\');

完成所有后端部分后，需要移动到前端。为了在字段为空的情况下有一个可见的编辑按钮（在这种情况下，没有选择图片），您需要将字段包装到一些包装器中。我使用了一个span包装器yourID 身份证件

<span id="yourID">
<?php /* Partner logo */

    $headPartner = get_theme_mod( \'your_theme_second_logo\' ); 

    if ( !empty($headPartner) ) {

        echo \'<img src="\' . $headPartner . \'" alt="Your Partner">\';

    }

?>
</span>