在 WooCommerce 购物车页面中添加费用的自定义复选框

基于在 Woocommerce 结帐页面中显示添加费用的复选框答案代码 我正在尝试将使用情况更改为购物车页面，而不是根据客户请求更改结账页面。

到目前为止，我设法在购物车页面上显示自定义费用复选框并触发 Ajax。

但购物车总数不会更新。 如果有人可以帮助编写代码或为我指明正确的方向？

// Display the custom checkbox field in cart

add_action( 'woocommerce_cart_totals_before_order_total', 'fee_installment_checkbox_field', 20 );
function fee_installment_checkbox_field(){
    echo '<tr class="packing-select"><th>Priority Dispatch</th><td>';

    woocommerce_form_field( 'priority_fee', array(
        'type'          => 'checkbox',
        'class'         => array('installment-fee form-row-wide'),
        'label'         => __(' $20.00'),
        'placeholder'   => __(''),
    ), WC()->session->get('priority_fee') ? '1' : '' );

    echo '<div class="tooltip">?
  <span class="tooltiptext">By selecting this option... </span>
</div></td>';
}

// jQuery - Ajax script
add_action( 'wp_footer', 'woo_add_cart_fee' );
function woo_add_cart_fee() {
    // Only on Checkout
    if(  ! is_wc_endpoint_url() ) :

    if( WC()->session->__isset('priority_fee') )
        WC()->session->__unset('priority_fee')
    ?>
    <script type="text/javascript">
    jQuery( function($){
        //if (typeof wc_add_to_cart_params  === 'undefined')
          //  return false;

        $('tr.packing-select').on('change', 'input[name=priority_fee]', function(){
            console.log('tests');
            var fee = $(this).prop('checked') === true ? '1' : '';
            
            

            $.ajax({
                type: 'POST',
                //url: wc_add_to_cart_params.ajax_url,
                data: {
                    'action': 'priority_fee',
                    'priority_fee': fee,
                },
                success: function (response) {
                    $('body').trigger('added_to_cart');
                },
            });
        });
    });
    </script>
    <?php
    endif;
    
}


// Get Ajax request and saving to WC session
add_action( 'wp_ajax_priority_fee', 'get_priority_fee' );
add_action( 'wp_ajax_nopriv_priority_fee', 'get_priority_fee' );
function get_priority_fee() {
    if ( isset($_POST['priority_fee']) ) {
        WC()->session->set('priority_fee', ($_POST['priority_fee'] ? true : false) );
    }
    die();
}


// Add a custom calculated fee conditionally
add_action( 'woocommerce_cart_calculate_fees', 'set_priority_fee' );
function set_priority_fee( $cart ){
    if ( is_admin() && ! defined('DOING_AJAX') )
        return;

    if ( did_action('woocommerce_cart_calculate_fees') >= 2 )
        return;

    if ( 1 == WC()->session->get('priority_fee') ) {
        $items_count = WC()->cart->get_cart_contents_count();
        $fee_label   = sprintf( __( "PRIORITY DISPATCH %s %s" ), '&times;', $items_count );
        $fee_amount  = 20;
        WC()->cart->add_fee( $fee_label, $fee_amount );
    }
}

add_filter( 'woocommerce_form_field' , 'remove_optional_txt_from_installment_checkbox', 10, 4 );
function remove_optional_txt_from_installment_checkbox( $field, $key, $args, $value ) {
    // Only on checkout page for Order notes field
    if( 'priority_fee' === $key ) {
        $optional = '&nbsp;<span class="optional">(' . esc_html__( 'optional', 'woocommerce' ) . ')</span>';
        $field = str_replace( $optional, '', $field );
    }
    return $field;
}

另外，这是应该这样做的方式，还是有更简单的方法来做到这一点？

您的代码中有一些错误。另外，在购物车页面上，jQuery 事件和 Ajax 行为有点不同，因此需要一些更改：

// Display the checkout field in cart page totals section
add_action( 'woocommerce_cart_totals_before_order_total', 'display_priority_fee_checkbox_field', 20 );
function display_priority_fee_checkbox_field(){
    echo '<tr class="installment-section">
    <th>'.__("Priority Dispatch").'</th><td>';

    woocommerce_form_field( 'priority_fee', array(
        'type'          => 'checkbox',
        'class'         => array('form-row-wide'),
        'label'         => __(' $20.00'),
    ), WC()->session->get('priority_fee') ? '1' : '' );

    echo '<div class="tooltip">?
    <span class="tooltiptext">'.__("By selecting this option... ").'</span>
    </div></td>';
}

// Remove "(optional)" text from the field
add_filter( 'woocommerce_form_field' , 'remove_optional_txt_from_priority_fee_checkbox', 10, 4 );
function remove_optional_txt_from_priority_fee_checkbox( $field, $key, $args, $value ) {
    // Only on checkout page for Order notes field
    if( 'priority_fee' === $key ) {
        $optional = '&nbsp;<span class="optional">(' . esc_html__( 'optional', 'woocommerce' ) . ')</span>';
        $field = str_replace( $optional, '', $field );
    }
    return $field;
}

// jQuery :: Ajax script
add_action( 'wp_footer', 'priority_fee_js_script' );
function priority_fee_js_script() {
    // On Order received page, remove the wc session variable if it exist
    if ( is_wc_endpoint_url('order-received')
        && WC()->session->__isset('priority_fee') ) :

        WC()->session->__unset('priority_fee');

    // On Cart page: jQuert script
    elseif ( is_cart() ) :

    ?>
    <script type="text/javascript">
    jQuery( function($){
        if (typeof woocommerce_params === 'undefined')
            return false;

        var c = 'input[name=priority_fee]';

        $(document.body).on( 'click change', c, function(){
            console.log('click');
            var fee = $(c).is(':checked') ? '1' : '';

            $.ajax({
                type: 'POST',
                url: woocommerce_params.ajax_url,
                data: {
                    'action': 'priority_fee',
                    'priority_fee': fee,
                },
                success: function (response) {
                    setTimeout(function(){
                        $(document.body).trigger('added_to_cart');
                    }, 500);
                },
            });
        });
    });
    </script>
    <?php
    endif;
}

// Get Ajax request and saving to WC session
add_action( 'wp_ajax_priority_fee', 'priority_fee_ajax_receiver' );
add_action( 'wp_ajax_nopriv_priority_fee', 'priority_fee_ajax_receiver' );
function priority_fee_ajax_receiver() {
    if ( isset($_POST['priority_fee']) ) {
        $priority_fee = $_POST['priority_fee'] ? true : false;
        // Set to a WC Session variable
        WC()->session->set('priority_fee', $priority_fee );

        echo $priority_fee ? '1' : '0';
        die();
    }
}

// Add a custom calculated fee conditionally
add_action( 'woocommerce_cart_calculate_fees', 'set_priority_fee' );
function set_priority_fee( $cart ){
    if ( is_admin() && ! defined('DOING_AJAX') )
        return;

    if ( WC()->session->get('priority_fee') ) {
        $item_count  = $cart->get_cart_contents_count();
        $fee_label   = sprintf( __( "PRIORITY DISPATCH %s" ), '&times; ' . $item_count );
        $fee_amount  = 20 * $item_count;
        $cart->add_fee( $fee_label, $fee_amount );
    }
}

代码位于活动子主题（或活动主题）的functions.php 文件中。经过测试并有效。