修改上报检测所时，图片为空的情况

extend/Detection/Wy.php

@@ -117,6 +117,7 @@ class Wy extends Base
         $oss = new Oss();
 
         $pics = [];
+        if (!empty($order_detection['detection_pic'])){
             $detection_pics = explode(',',$order_detection['detection_pic']);
             foreach ($detection_pics as $key => $value){
                 // 去除用户签名图片第一个/ oss不识别
@@ -136,6 +137,8 @@ class Wy extends Base
                 $pics[$key]['pictureName'] = "检测管图片"; // 图片名称
                 $pics[$key]['pictureInfo'] = $pic; // 对图片进行base64后的编码
             }
+        }
+
 
         // 获取签名
         $sign = $this->getSign();