你没有在主题文件中这样做是对的，你也有正确的想法，把它放进你的functions.php. 尝试下面所示的方法，它更符合您的实际需要，因此请选择适合您的情况的方法。

Code:

    //remove add to cart buttons
    add_action( \'init\', \'wpse124288_wc_remove_add_to_cart_buttons\' );
    function wpse124288_wc_remove_add_to_cart_buttons() {
        //add to cart button loop
        remove_action( \'woocommerce_after_shop_loop_item\', \'woocommerce_template_loop_add_to_cart\', 10 );
        //add to cart button single product
        remove_action( \'woocommerce_single_product_summary\', \'woocommerce_template_single_add_to_cart\', 30 );
    }

    //(re)add add to cart buttons
    add_action( \'init\', \'wpse124288_wc_readd_add_to_cart_buttons\' );
    function wpse124288_wc_readd_add_to_cart_buttons() {
        //add to cart button loop
        add_action( \'woocommerce_after_shop_loop_item\', \'woocommerce_template_loop_add_to_cart\', 10 );
        //add to cart button single product
        add_action( \'woocommerce_single_product_summary\', \'woocommerce_template_single_add_to_cart\', 30 );
    }