所以，在整个搜索之后，我找到了解决方案。添加新设置并添加新控件。在控件内部，添加新

add_action( \'customize_register\', \'custom_logo_uploader\' );
function custom_logo_uploader($wp_customize) {

    $wp_customize->add_section( \'upload_custom_logo\', array(
        \'title\'          => \'Logo\',
        \'description\'    => \'Display a custom logo?\',
        \'priority\'       => 25,
    ) );

    $wp_customize->add_setting( \'custom_logo\', array(
        \'default\'        => \'\',
    ) );

    $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, \'custom_logo\', array(
        \'label\'   => \'Custom logo\',
        \'section\' => \'upload_custom_logo\',
        \'settings\'   => \'custom_logo\',
    ) ) );

    $wp_customize->add_setting( \'custom_logo2\', array(
        \'default\'        => \'\',
    ) );

    $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, \'custom_logo2\', array(
        \'label\'   => \'Custom logo\',
        \'section\' => \'upload_custom_logo\', // put the name of whatever section you want to add your settings
        \'settings\'   => \'custom_logo2\',
    ) ) );
}