以前我从控制器向视图发送一个值，并且成功地获得了该值。现在我想使用JSON数据发送两个值。

控制器

$batch_wise_stock =  sprintf('%0.2f',(!empty($pur_product_batch->purchase_qty)?$pur_product_batch->purchase_qty:0)-(!empty($sellt_prod_batch->sale_qty)?$sellt_prod_batch->sale_qty:0));
    $batch_wise_rate = $pur_product_batch->rate;
   
    $json_product[] = array('qty'=>$batch_wise_stock,'rate'=>$batch_wise_rate);
           echo json_encode($json_product);

** AJAX 技术**

$.ajax( {
        url: base_url + "invoice/invoice/batchwise_productprice",
        method: 'post',
        dataType: "json",
        data: {
        prod_id: prod_id,
        batch_no:batch_no,
        csrf_test_name:csrf_test_name,
        },
        success: function( data ) {
            var obj = jQuery.parseJSON(data);
            console.log(obj);
            if (parseInt(data) >= 0) {
                $(".available_quantity_" + sl).val(data.toFixed(2,2));
            }else{
                var message = "You can Sale maximum " + available_quantity + " Items";
                toastr["error"](message);
                $("#total_qntt_" + sl).val('');
                var quantity = 0;
                $("#total_price_" + sl).val(0);
                for(var i=0;i<taxnumber;i++){
                    $("#all_tax"+i+"_" + sl).val(0);
                    
                }
            }
           
        }
      });

错误

Uncaught SyntaxError: JSON.parse: unexpected character at line 1 column 2 of the JSON data