我请求你的帮助，我已经好几个小时没出来了。
我在Woocommerce商店页面上设置了数量选择器，自动将商品放入购物车和/或将其删除。
我有一个大问题，当我在0，我按下-数字是负的，我要确保它不能低于0。
非常感谢!
Function.php
// Remove Add To cart Button
remove_action('woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 10);
// Add our Quanity Input
add_action('woocommerce_after_shop_loop_item', 'QTY');
function QTY()
{
global $product;
?>
<div class="shopAddToCart">
<button value="-" class="minus2" >-</button>
<input type="text"
disabled="disabled"
size="2"
value="<?php echo (Check_if_product_in_cart($product->get_id())) ? Check_if_product_in_cart($product->get_id())['QTY'] : 0;
?>"
id="count"
data-product-id= "<?php echo $product->get_id() ?>"
data-in-cart="<?php echo (Check_if_product_in_cart($product->get_id())) ? Check_if_product_in_cart($product->get_id())['in_cart'] : 0;
?>"
data-in-cart-qty="<?php echo (Check_if_product_in_cart($product->get_id())) ? Check_if_product_in_cart($product->get_id())['QTY'] : 0;
?>"
class="quantity qty qty-botton"
max_value = "<?php echo ($product->get_max_purchase_quantity() == -1) ? 1000 : $product->get_max_purchase_quantity(); ?>"
min_value = <?php echo $product->get_min_purchase_quantity(); ?>
>
<button type="button" value="+" class="plus2" >+</button>
</div>
<?php
}
//Check if Product in Cart Already
function Check_if_product_in_cart($product_ids)
{
foreach (WC()->cart->get_cart() as $cart_item):
$items_id = $cart_item['product_id'];
$QTY = $cart_item['quantity'];
// for a unique product ID (integer or string value)
if ($product_ids == $items_id):
return ['in_cart' => true, 'QTY' => $QTY];
endif;
endforeach;
}
//Add Event Handler To update QTY
add_action('wc_ajax_update_qty', 'update_qty');
function update_qty()
{
ob_start();
$product_id = absint($_POST['product_id']);
$product = wc_get_product($product_id);
$quantity = $_POST['quantity'];
foreach (WC()->cart->get_cart() as $cart_item_key => $cart_item):
if ($cart_item['product_id'] == $product_id) {
WC()->cart->set_quantity($cart_item_key, $quantity, true);
}
endforeach;
wp_send_json('done');
}
*.js jQuery on Footer
jQuery(document).ready(function ($) {
"use strict";
// Add Event Listner on the Plush button
$('.plus2').click(function () {
if (parseInt($(this).prev().val()) < parseInt($(this).prev().attr('max_value'))) {
$(this).prev().val(+$(this).prev().val() + 1);
var currentqty = parseInt($(this).prev().attr('data-in-cart-qty')) + 1;
var id = $(this).prev().attr('data-product-id');
var data = {
product_id: id,
quantity: 1
};
$(this).prev().attr('data-in-cart-qty', currentqty);
$(this).parent().addClass('loading');
$.post(wc_add_to_cart_params.wc_ajax_url.toString().replace('%%endpoint%%', 'add_to_cart'), data, function (response) {
if (!response) {
return;
}
if (response) {
var url = woocommerce_params.wc_ajax_url;
url = url.replace("%%endpoint%%", "get_refreshed_fragments");
$.post(url, function (data, status) {
$(".woocommerce.widget_shopping_cart").html(data.fragments["div.widget_shopping_cart_content"]);
if (data.fragments) {
jQuery.each(data.fragments, function (key, value) {
jQuery(key).replaceWith(value);
});
}
jQuery("body").trigger("wc_fragments_refreshed");
});
$('.plus2').parent().removeClass('loading');
}
});
}
});
$('.minus2').click(function () {
$(this).next().val(+$(this).next().val() - 1);
var currentqty = parseInt($(this).next().val());
var id = $(this).next().attr('data-product-id');
var data = {
product_id: id,
quantity: currentqty
};
$(this).parent().addClass('loading');
$.post(wc_add_to_cart_params.wc_ajax_url.toString().replace('%%endpoint%%', 'update_qty'), data, function (response) {
if (!response) {
return;
}
if (response) {
var url = woocommerce_params.wc_ajax_url;
url = url.replace("%%endpoint%%", "get_refreshed_fragments");
$.post(url, function (data, status) {
$(".woocommerce.widget_shopping_cart").html(data.fragments["div.widget_shopping_cart_content"]);
if (data.fragments) {
jQuery.each(data.fragments, function (key, value) {
jQuery(key).replaceWith(value);
});
}
jQuery("body").trigger("wc_fragments_refreshed");
});
$('.plus2').parent().removeClass('loading');
}
});
});
});
只需在运行前添加一个检查:
$(this).next().val(+$(this).next().val() - 1);
将变成:
if ( $(this).next().val() > 0 ) {
$(this).next().val(+$(this).next().val() - 1);
}
还要注意，您对每个产品的每个数量输入使用相同的id。id属性值在页面中应该是唯一的.
您可以在添加到购物车表单的数量字段中找到一些添加加减按钮的方法(您可以从中获得灵感):
- Woocommerce 3自定义加减数量按钮
- WooCommerce加减按钮
- WooCommerce: Add to Cart Plus &/ul>
感谢Vincenzo Di Gaetano。
我是这样解决的:
$('.minus2').click(function () {
var $minus2 = $(this);
var oldValue = $minus2.parent().find("input").val();
if (oldValue > 0) {
$(this).next().val(+$(this).next().val() - 1);
.....